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(Mirror.co.uk)   No need to panic for this asteroid, it's only going to miss the earth by a measly 15,000 miles on February 15   (mirror.co.uk) divider line 135
    More: Scary, disasters, University of New South Wales, space rocks  
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9510 clicks; posted to Main » on 07 Feb 2013 at 3:58 PM (1 year ago)   |  Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



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2013-02-07 02:07:20 PM
I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.
 
2013-02-07 02:09:53 PM
The asteroid is no problem

/but that alien invasion force hiding behind it is
 
2013-02-07 02:16:24 PM
Just get Bruce Willis. He'll save us.
 
2013-02-07 02:16:40 PM
2dboy.com
 
2013-02-07 02:24:22 PM

SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.


ROFL
the fact that you even ASK this question is a sign that the understanding of science in the world ... well most people are dumb.

1) "take out the moon" - let's break that down
a) take out = moon magically disappeared, no fragments. poof tides caused by the moon would go away. there would possibly be some residual oscillation, but that would quickly dampen. Quakes caused by this would probably not be an issue. life requiring the tides to survive would suffer. life requiring moonlight for breeding and what no would suffer.
but this would be the best case

b) take out = blow to pieces. well ... this would take a HUGE asteroid moving at a large delta-V. which we would already have seen and know was coming decades in advance. but going with the case
the pieces would SHATTER. some would go up and out, some would come down, some would form an AWESOME asteroid belt/ring around the earth for a rather long time. Satellites would become a thing of the past, along with the space station.

BUT, the pieces which rained down? well we would be farked. even a small percent hitting the earth would royally fark us.

2) the same tiny asteroid missing us but hitting the moon.
MEH
a) there would be moonquakes, which would have no impact on us
b) there would be ejecta, some of which would rain down on the earth, but we are talking much smaller pieces, smaller than the impacting asteroid, and in the end, meh
c) this would only be a problem for us if the impact was on the near side of the moon. if it were on the dark side of the moon, there would be the ringing of many alarms

tl;dr
nothing would happen to us
 
2013-02-07 02:27:21 PM
It is estimated that there are more than a million near-Earth asteroids smaller than 100 meters
If it were to hit Earth in the distant future, it is estimated that it would produce the equivalent of 2.5 of TNT. The has been estimated at 3−20 megatons. Asteroids about 50 meters in diameter are expected to impact Earth once every 1200 years or so.

so pretty much nothing. esp since this thing is tiny and would almost certainly hit the ocean. well about 66% chance of miss.
 
2013-02-07 02:29:17 PM

texdent: Just get Bruce Willis. He'll save us.


He's busy in Moscow.
 
2013-02-07 02:48:40 PM

SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.


Oh definitely.  But the potential for barbarians and sorcery looks pretty good.

3.bp.blogspot.com
 
2013-02-07 02:55:43 PM
sadventurez.files.wordpress.com
 
2013-02-07 02:58:08 PM
Why are people so obsessed with the end the world? It's too bad that your life sucks so much that you're praying for the end of the world but it's not going to happen. Not until the sun burns out and that's a period of time that neither you nor I can comprehend. So farking relax about the end of the world and if you're looking forward to it so much, just kill yourself and get it over with.
 
2013-02-07 02:59:27 PM

namatad: ROFL
the fact that you even ASK this question is a sign that the understanding of science in the world ... well most people are dumb.


i'm not that bright.  see my posts in the politics tab.
 
2013-02-07 03:14:31 PM
It has to get so close so They can drop off the assimilation pods.
 
2013-02-07 03:16:33 PM

Mugato: Why are people so obsessed with the end the world? It's too bad that your life sucks so much that you're praying for the end of the world but it's not going to happen. Not until the sun burns out and that's a period of time that neither you nor I can comprehend. So farking relax about the end of the world and if you're looking forward to it so much, just kill yourself and get it over with.


It is a virtual certainty that life on earth will be catastrophically devastated by an asteroid impact long before the sun burns out.

Assuming, of course, we don't bother to worry about such things and make no effort to plan for them.
 
2013-02-07 03:21:42 PM

Diogenes: Oh definitely. But the potential for barbarians and sorcery looks pretty good.



Thank you.

My first thought as well
 
2013-02-07 03:24:00 PM

Diogenes: SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.

Oh definitely.  But the potential for barbarians and sorcery looks pretty good.

[3.bp.blogspot.com image 425x744]



LORDS OF LIGHT!
 
2013-02-07 03:28:58 PM
Wait, wait, we all know from the movies that asteroids only threaten the Earth when there is black preside...

...I'll be in my bunker.
 
2013-02-07 03:43:38 PM
3) The moon gets knocked out of orbit by a large asteroid, towards the Earth, causing tidal catastrophe until its orbit decays and we are all farked
 
2013-02-07 04:00:12 PM
Prepping my purple blanket and white sneakers as we speak.
 
2013-02-07 04:00:16 PM

SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.


SlothB77

 
2013-02-07 04:01:28 PM

ChipNASA: SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.

SlothB77


Let's try that again....(got-damn-it)

SlothB77
i.imgur.com
 
2013-02-07 04:01:30 PM

Skywolf the Scribbler: 3) The moon gets knocked out of orbit by a large asteroid, towards the Earth, causing tidal catastrophe until its orbit decays and we are all farked


lawl
the energy required to knock the moon out of its orbit is literally astronomical.
1) the body would have to be moon-sized, which we know most/all of the moon sized objects in most of the solar system (within the orbit of say neptune). (dont get me started outside the orbit of pluto)
Think pool balls bouncing off of each other.
so never gonna happen

2) small body. the body would have to have enough momentum (mass times velocity) to be a significant fraction of the moons orbital momentum. Think trying to move your house with a grain of sand.
If the body is small enough, it would have to be moving so fast that it would shatter on impact and fracture the moon rather than "move" the moon.

and yet, people were worried that the world would end in 2012 .... LOL
 
2013-02-07 04:02:18 PM

SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.


Serious, not sure if.
 
2013-02-07 04:04:57 PM
namatad:

...

Your mother
 
2013-02-07 04:06:22 PM

namatad: SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.

ROFL
the fact that you even ASK this question is a sign that the understanding of science in the world ... well most people are dumb.

1) "take out the moon" - let's break that down
a) take out = moon magically disappeared, no fragments. poof tides caused by the moon would go away. there would possibly be some residual oscillation, but that would quickly dampen. Quakes caused by this would probably not be an issue. life requiring the tides to survive would suffer. life requiring moonlight for breeding and what no would suffer.
but this would be the best case

b) take out = blow to pieces. well ... this would take a HUGE asteroid moving at a large delta-V. which we would already have seen and know was coming decades in advance. but going with the case
the pieces would SHATTER. some would go up and out, some would come down, some would form an AWESOME asteroid belt/ring around the earth for a rather long time. Satellites would become a thing of the past, along with the space station.

BUT, the pieces which rained down? well we would be farked. even a small percent hitting the earth would royally fark us.

2) the same tiny asteroid missing us but hitting the moon.
MEH
a) there would be moonquakes, which would have no impact on us
b) there would be ejecta, some of which would rain down on the earth, but we are talking much smaller pieces, smaller than the impacting asteroid, and in the end, meh
c) this would only be a problem for us if the impact was on the near side of the moon. if it were on the dark side of the moon, there would be the ringing of many alarms

tl;dr
nothing would happen to us


Why call people dumb when you just totally ignored what you were writing?

"nothing would happen to us" was your final conclusion yet in the three scenarios, two would affect us in quite negative ways.  That is opposite of your conclusion "nothing would happen to us".

Just because someone may be less informed but have a beautiful, quizzical mind doesn't mean they are stupid, it means they are asking to be taught.
 
2013-02-07 04:06:46 PM

Skywolf the Scribbler: namatad:

...

Your mother


is dead and buried, but thanks for bringing her into the discusion
 
2013-02-07 04:07:50 PM
If we all die, it will because of all you fornicators having the sex on Valentine's Day.
 
2013-02-07 04:08:26 PM
That's it! I'm buying a military assault weapon to protect me & my family from asteroids!
 
2013-02-07 04:08:39 PM

Skywolf the Scribbler: 3) The moon gets knocked out of orbit by a large asteroid, towards the Earth, causing tidal catastrophe until its orbit decays and we are all farked


No. That isn't going to happen. There just aren't that many thing that are that big in the Solar System anymore.

upload.wikimedia.org

Sedna isn't coming by to party, either.
 
2013-02-07 04:09:57 PM
Cosmic horseshoes.
 
2013-02-07 04:10:36 PM

YixilTesiphon: Skywolf the Scribbler: 3) The moon gets knocked out of orbit by a large asteroid, towards the Earth, causing tidal catastrophe until its orbit decays and we are all farked

No. That isn't going to happen. There just aren't that many thing that are that big in the Solar System anymore.

[upload.wikimedia.org image 632x521]

Sedna isn't coming by to party, either.


You forgot to list your mom...
 
2013-02-07 04:11:35 PM
Didn't we have this thread last week?  And the week before that?
 
2013-02-07 04:11:54 PM

namatad: Skywolf the Scribbler: 3) The moon gets knocked out of orbit by a large asteroid, towards the Earth, causing tidal catastrophe until its orbit decays and we are all farked

lawl
the energy required to knock the moon out of its orbit is literally astronomical.
1) the body would have to be moon-sized, which we know most/all of the moon sized objects in most of the solar system (within the orbit of say neptune). (dont get me started outside the orbit of pluto)
Think pool balls bouncing off of each other.
so never gonna happen

2) small body. the body would have to have enough momentum (mass times velocity) to be a significant fraction of the moons orbital momentum. Think trying to move your house with a grain of sand.
If the body is small enough, it would have to be moving so fast that it would shatter on impact and fracture the moon rather than "move" the moon.

and yet, people were worried that the world would end in 2012 .... LOL




What if we blew up the moon?Link
 
2013-02-07 04:12:22 PM

WhoGAS: two would affect us in quite negative ways.


except that the likely hood of 1b happening is ~= zero
the chance of 2012 DA14 causing 1b is zero. (2012 DA14 is so tiny and moving so slow that it would have to hit a city directly to have an impact)
the chance of 2 happening and having an impact is tiny. the chance of  2012 DA14 hitting the moon and having any impact at all on the earth is zero.

/for all values of zero other than the pendant version of NOT ZERO JUST so close to zero to be functionally equiv, but you cant call it zero)
/but go ahead and argue that you mean affect as in if it is possible, no matter how vanishingly small
/strangely enough the dino-civilizations thought the same thing right beforechicxulub hit the earth.
 
2013-02-07 04:12:42 PM

namatad: 2) the same tiny asteroid missing us but hitting the moon.
MEH
a) there would be moonquakes, which would have no impact on us
b) there would be ejecta, some of which would rain down on the earth, but we are talking much smaller pieces, smaller than the impacting asteroid, and in the end, meh
c) this would only be a problem for us if the impact was on the near side of the moon. if it were on the dark side of the moon, there would be the ringing of many alarms


Okay, that just made my whole day.

Anyway, I have a long-standing argument with some 'smart' friends of mine about the moon breaking-up scene in the travesty that is the recent Time Machine movie. My argument was that not only could we NOT break the moon up using subterranean nuclear explosion, but even if we COULD rip the moon in half - it wouldn't break up. It would just pull itself back together again due to gravitational attraction. The amount of energy to move the moon much closer to the earth AND disperse huge chunks of it is simply not going to happen with 'nuclear weapons' of any scale.
 
2013-02-07 04:13:13 PM

SlothB77: I always hear about astronomers gauging the likelihood something will hit earth. What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too? Tides and such as.


i.imgur.com

No. In fact that would be awesome because that would give us Thundarr the Barbarian. As long as it cracks the moon open, it doesn't have to even hit it.
 
2013-02-07 04:14:32 PM

blatz514: Didn't we have this thread last week?  And the week before that?


stupid earth crossing asteroids. I predict that earth crossing asteroids in 2014 will replace mass shooting stories in 2013, just as shark sighting stories are in decline
 
2013-02-07 04:14:33 PM

namatad: WhoGAS: two would affect us in quite negative ways.

except that the likely hood of 1b happening is ~= zero
the chance of 2012 DA14 causing 1b is zero. (2012 DA14 is so tiny and moving so slow that it would have to hit a city directly to have an impact)
the chance of 2 happening and having an impact is tiny. the chance of  2012 DA14 hitting the moon and having any impact at all on the earth is zero.

/for all values of zero other than the pendant version of NOT ZERO JUST so close to zero to be functionally equiv, but you cant call it zero)
/but go ahead and argue that you mean affect as in if it is possible, no matter how vanishingly small
/strangely enough the dino-civilizations thought the same thing right beforechicxulub hit the earth.


Your resopnse has nothing to do with my post to you.
 
2013-02-07 04:14:53 PM

Diogenes: Oh definitely. But the potential for barbarians and sorcery looks pretty good.


From the depths of hell I shake my tiny fist at thee.
 
2013-02-07 04:15:03 PM

namatad: Skywolf the Scribbler: 3) The moon gets knocked out of orbit by a large asteroid, towards the Earth, causing tidal catastrophe until its orbit decays and we are all farked

lawl
the energy required to knock the moon out of its orbit is literally astronomical.
1) the body would have to be moon-sized, which we know most/all of the moon sized objects in most of the solar system (within the orbit of say neptune). (dont get me started outside the orbit of pluto)
Think pool balls bouncing off of each other.
so never gonna happen

2) small body. the body would have to have enough momentum (mass times velocity) to be a significant fraction of the moons orbital momentum. Think trying to move your house with a grain of sand.
If the body is small enough, it would have to be moving so fast that it would shatter on impact and fracture the moon rather than "move" the moon.

and yet, people were worried that the world would end in 2012 .... LOL


im1n.clkimg.com
 
2013-02-07 04:16:57 PM

Somacandra: Diogenes: Oh definitely. But the potential for barbarians and sorcery looks pretty good.

From the depths of hell I shake my tiny fist at thee.


A day late and a Mok short ;-)
 
2013-02-07 04:17:13 PM
img.photobucket.com
 
2013-02-07 04:18:13 PM
Go team Morlok!
 
2013-02-07 04:18:45 PM

SlothB77: namatad: ROFL
the fact that you even ASK this question is a sign that the understanding of science in the world ... well most people are dumb.

i'm not that bright.  see my posts in the politics tab.


Don't capitulate to that alien, his barely comprehensible post whould have been more effective if he kept it to one sentence: it would take a very big asteroid.  Not to mention that when he described the scenario of a really big asteroid slamming into the moon he went on to explain that yes, you're right, we would be screwed.
 
2013-02-07 04:18:56 PM
madgonad:
Okay, that just made my whole day.

:D

Anyway, I have a long-standing argument with some 'smart' friends of mine about the moon breaking-up scene in the travesty that is the recent Time Machine movie. My argument was that not only could we NOT break the moon up using subterranean nuclear explosion, but even if we COULD rip the moon in half - it wouldn't break up. It would just pull itself back together again due to gravitational attraction. The amount of energy to move the moon much closer to the earth AND disperse huge chunks of it is simply not going to happen with 'nuclear weapons' of any scale.

I agree with the travesty, but I LOVED the visual effect of looking up at the shattered moon and how it played out over time. It sounds like a question for the teaming millions over at The Straight Dope.
How much energy would be required to "split" or fragment the moon?? I am guessing that the answer would require a lot of zeros.
 
2013-02-07 04:19:21 PM
imgs.xkcd.com
 
2013-02-07 04:21:17 PM
3) The moon gets knocked out of orbit by a large asteroid, towards the Earth, causing tidal catastrophe until its orbit decays and we are all farked

Planetary bodies are not pool balls, they can not be knocked any which way. To cause the moon to have an orbit that decays and falls into earth you actually have to decrease its energy and speed it up. (Larger orbits require more energy but the body actually moves slower).  This means that the large asteroid would need to not only bounce off the moon, but take considerably more energy with it than it came in with. This is not likely.

A significantly large impact would increase the energy of the moon (as the moon is absorbing the kinetic energy of the asteroid), causing it to orbit further out. This would change its period and the timing of the tides. Also the tides would be smaller as the gravitational force from the moon would be smaller.
 
2013-02-07 04:21:52 PM

jehovahs witness protection: namatad: Skywolf the Scribbler: 3) The moon gets knocked out of orbit by a large asteroid, towards the Earth, causing tidal catastrophe until its orbit decays and we are all farked

lawl
the energy required to knock the moon out of its orbit is literally astronomical.
1) the body would have to be moon-sized, which we know most/all of the moon sized objects in most of the solar system (within the orbit of say neptune). (dont get me started outside the orbit of pluto)
Think pool balls bouncing off of each other.
so never gonna happen

2) small body. the body would have to have enough momentum (mass times velocity) to be a significant fraction of the moons orbital momentum. Think trying to move your house with a grain of sand.
If the body is small enough, it would have to be moving so fast that it would shatter on impact and fracture the moon rather than "move" the moon.

and yet, people were worried that the world would end in 2012 .... LOL

[im1n.clkimg.com image 480x200]


That is just space madness.
 
2013-02-07 04:22:18 PM

SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.


We know about anything big enough to do damage to the moon like that.  Honestly if we knew a smaller asteroid was going to hit the moon it would be something to train my telescope on and watch.  Most of the easily visible craters on the moon were caused by an asteroid at least 1000 meters across.
 
2013-02-07 04:23:40 PM

Mugato: Why are people so obsessed with the end the world? It's too bad that your life sucks so much that you're praying for the end of the world but it's not going to happen. Not until the sun burns out and that's a period of time that neither you nor I can comprehend. So farking relax about the end of the world and if you're looking forward to it so much, just kill yourself and get it over with.


I have no doubt the world will be here A LOT longer than the human race. So yeah good point.

As far as this asteroid goes, they keep revising the distance from earth down, so buckle up for a potetial show!
 
2013-02-07 04:24:25 PM

namatad: SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.

ROFL
the fact that you even ASK this question is a sign that the understanding of science in the world ... well most people are dumb.


Sometimes people honestly don't know. They could be ten years old, or never interested in the subject until now ... And if someone truly has a learning difficulty, it's not their fault.
 
2013-02-07 04:24:58 PM

namatad: WhoGAS: two would affect us in quite negative ways.

except that the likely hood of 1b happening is ~= zero
the chance of 2012 DA14 causing 1b is zero. (2012 DA14 is so tiny and moving so slow that it would have to hit a city directly to have an impact)
the chance of 2 happening and having an impact is tiny. the chance of  2012 DA14 hitting the moon and having any impact at all on the earth is zero.

/for all values of zero other than the pendant version of NOT ZERO JUST so close to zero to be functionally equiv, but you cant call it zero)
/but go ahead and argue that you mean affect as in if it is possible, no matter how vanishingly small
/strangely enough the dino-civilizations thought the same thing right beforechicxulub hit the earth.


So... you're saying there's a chance?
 
2013-02-07 04:26:03 PM

namatad: SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.

ROFL


[la snippa]

tl;dr
nothing would happen to us


But what if Omnipotus takes a bite out of the moon.


home.jps.net


/ M-O-O-N, that spells lunch.
 
2013-02-07 04:27:44 PM
It's effectively a wandering nuke. It can't end the world, but if everything lines up, it could sure ruin a city.

Depending on which city gets it, the world may be improved.

/don't blame me - it would be chalked up as an "act of God."
 
2013-02-07 04:28:58 PM

Diogenes: If we all die, it will because of all you fornicators having the sex on Valentine's Day.


Don't blame me, I've been married 23 years.
 
2013-02-07 04:29:26 PM
i877.photobucket.com
 
2013-02-07 04:29:41 PM
Wait until it hears my earth-shattering battle cry.
 
2013-02-07 04:30:00 PM
Everyone chill the fark out.  I got this

t3.gstatic.com
 
2013-02-07 04:30:33 PM
I'll just leave this here lol!
 
2013-02-07 04:30:44 PM
img688.imageshack.us
 
2013-02-07 04:30:52 PM

Diogenes: SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.

Oh definitely.  But the potential for barbarians and sorcery looks pretty good.

[3.bp.blogspot.com image 425x744]


Someone needs to make a live action Thundarr the Barbarian movie.
 
2013-02-07 04:31:45 PM
Oops, goddam unfetchable$#@!

cdnimg.visualizeus.com
 
2013-02-07 04:31:46 PM

AlwaysRightBoy: Diogenes: If we all die, it will because of all you fornicators having the sex on Valentine's Day.

Don't blame me, I've been married 23 years.


Married 23 years and your handle is "always right boy"? Somethings not adding up here.
 
2013-02-07 04:32:45 PM

namatad: Skywolf the Scribbler: 3) The moon gets knocked out of orbit by a large asteroid, towards the Earth, causing tidal catastrophe until its orbit decays and we are all farked

lawl
the energy required to knock the moon out of its orbit is literally astronomical.
1) the body would have to be moon-sized, which we know most/all of the moon sized objects in most of the solar system (within the orbit of say neptune). (dont get me started outside the orbit of pluto)
Think pool balls bouncing off of each other.
so never gonna happen

2) small body. the body would have to have enough momentum (mass times velocity) to be a significant fraction of the moons orbital momentum. Think trying to move your house with a grain of sand.
If the body is small enough, it would have to be moving so fast that it would shatter on impact and fracture the moon rather than "move" the moon.

and yet, people were worried that the world would end in 2012 .... LOL


That's based on the assumption that the object was the same density as the moon. If it were say a rogue brown dwarf, or burnt out black/white dwarf or a singularity it could be smaller than the earth or moon and yet have nearly the mass of our sun, or much much more. If that happened, we may not even know it was there until it started playing toss with the planets in the solar system.
 
2013-02-07 04:32:58 PM

namatad: SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.

ROFL
the fact that you even ASK this question is a sign that the understanding of science in the world ... well most people are dumb.

if it were on the dark side of the moon, there would be the ringing of many alarms

tl;dr
nothing would happen to us


dark side?

you mean the 'far side' that always faces away from earth but is alternately light and dark as it orbits the earth

upload.wikimedia.org
 
2013-02-07 04:33:22 PM
I should probably read threads before I post.  Wouldn't you agree, BunkoSquad?
 
2013-02-07 04:34:59 PM

NotARocketScientist: 3) The moon gets knocked out of orbit by a large asteroid, towards the Earth, causing tidal catastrophe until its orbit decays and we are all farked

Planetary bodies are not pool balls, they can not be knocked any which way. To cause the moon to have an orbit that decays and falls into earth you actually have to decrease its energy and speed it up. (Larger orbits require more energy but the body actually moves slower).  This means that the large asteroid would need to not only bounce off the moon, but take considerably more energy with it than it came in with. This is not likely.


You could also have deterioration of the moon's orbit caused by a black hole passing through the solar system's plane at near-right angles
 
2013-02-07 04:35:36 PM

Hobodeluxe: Diogenes: SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.

Oh definitely.  But the potential for barbarians and sorcery looks pretty good.

[3.bp.blogspot.com image 425x744]

Someone needs to make a live action Thundarr the Barbarian movie.


I think that would be cool.  But as with all those things, it risks ruining another cherished memory.

/debbie downer
 
2013-02-07 04:37:45 PM

namatad: SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.

ROFL
the fact that you even ASK this question is a sign that the understanding of science in the world ... well most people are dumb.

1) "take out the moon" - let's break that down
a) take out = moon magically disappeared, no fragments. poof tides caused by the moon would go away. there would possibly be some residual oscillation, but that would quickly dampen. Quakes caused by this would probably not be an issue. life requiring the tides to survive would suffer. life requiring moonlight for breeding and what no would suffer.
but this would be the best case

b) take out = blow to pieces. well ... this would take a HUGE asteroid moving at a large delta-V. which we would already have seen and know was coming decades in advance. but going with the case
the pieces would SHATTER. some would go up and out, some would come down, some would form an AWESOME asteroid belt/ring around the earth for a rather long time. Satellites would become a thing of the past, along with the space station.

BUT, the pieces which rained down? well we would be farked. even a small percent hitting the earth would royally fark us.

2) the same tiny asteroid missing us but hitting the moon.
MEH
a) there would be moonquakes, which would have no impact on us
b) there would be ejecta, some of which would rain down on the earth, but we are talking much smaller pieces, smaller than the impacting asteroid, and in the end, meh
c) this would only be a problem for us if the impact was on the near side of the moon. if it were on the dark side of the moon, there would be the ringing of many alarms

tl;dr
nothing would happen to us


I suppose that plenty of people here could ask scientific questions that you do not know the answer to, so by your very own reasoning you would be considered dumb, right?
 
2013-02-07 04:38:21 PM

VvonderJesus: [imgs.xkcd.com image 462x316]


I have never understood making fun of someone because they don't know something.  Especially if they are asking so they can learn.

Making fun of the deliberately uninformed, that's different.
 
2013-02-07 04:39:47 PM

SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.


People shouldn't have been so mean.
All of them have heard their teachers udder the words "there is no such thing as a dumb question". But this is Fark, so it is not a place to ask questions and not expect to get rude and demeaning remarks by people that are obviously geniuses that have nothing better to do than hang out in Fark looking to show off their big brains.

As simple search would have found *this* and other answers to your guestion.
 
2013-02-07 04:40:22 PM

aseras: That's based on the assumption that the object was the same density as the moon. If it were say a rogue brown dwarf, or burnt out black/white dwarf or a singularity it could be smaller than the earth or moon and yet have nearly the mass of our sun, or much much more. If that happened, we may not even know it was there until it started playing toss with the planets in the solar system.


true
but we know that there are no unknown, super-massive, objects within .... the solar system. the perturbations of orbits would be large enough for us to have detected already.

which leaves extra-solar objects ....
Time to rewatch When Worlds Collide
 
2013-02-07 04:41:17 PM

Cthulhu_is_my_homeboy: SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.

Serious, not sure if.



SlothB77: i'm not that bright. see my posts in the politics tab.

 
2013-02-07 04:41:18 PM

Mugato: Why are people so obsessed with the end the world? It's too bad that your life sucks so much that you're praying for the end of the world but it's not going to happen. Not until the sun burns out and that's a period of time that neither you nor I can comprehend. So farking relax about the end of the world and if you're looking forward to it so much, just kill yourself and get it over with.


Lookit....I just need to know if now is the time I take a dump on the boss' desk and tear through my remaining life savings on escorts and top-shelf bourbon.
 
2013-02-07 04:41:36 PM

SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.


The tides are the least of the problem.  If the moon broke apart it would likely rain down on the planet.  That wouldn't be any fun.  Even if it didn't the moon does far more than affect the tide.  It also keeps the planet spinning at the right rate, and keeps the plates from fusing together.

But that isn't what I came here to say.  This is what I came to say...

There is so much ignorance in that article it's laughable.  I'll just point out two things:
1.  We can't deflect an asteroid with a rocket of any kind.  We don't have guidance or meneuvering systems to navigate out to something like that.  Weapon's like that are not designed for space flight.
2.  We can't nuke the thing and blow it apart because even if that were possible, the peices would still rain down on earth, and they would then be radioactive.  Out of the frying pan, into the fire.
 
2013-02-07 04:41:56 PM

INeedAName: namatad: WhoGAS: two would affect us in quite negative ways.

except that the likely hood of 1b happening is ~= zero
the chance of 2012 DA14 causing 1b is zero. (2012 DA14 is so tiny and moving so slow that it would have to hit a city directly to have an impact)
the chance of 2 happening and having an impact is tiny. the chance of  2012 DA14 hitting the moon and having any impact at all on the earth is zero.

/for all values of zero other than the pendant version of NOT ZERO JUST so close to zero to be functionally equiv, but you cant call it zero)
/but go ahead and argue that you mean affect as in if it is possible, no matter how vanishingly small
/strangely enough the dino-civilizations thought the same thing right beforechicxulub hit the earth.

So... you're saying there's a chance?


On the politics tab, this would pass for a plausible explanation to 90%.
 
2013-02-07 04:42:47 PM

hp6sa: VvonderJesus: [imgs.xkcd.com image 462x316]

I have never understood making fun of someone because they don't know something.  Especially if they are asking so they can learn.

Making fun of the deliberately uninformed, that's different.


thetfs.ca
 
2013-02-07 04:44:39 PM
Don't freak out or anything, but I do volunteer work tutoring kids after school.  For example, last night I tutored a 7th grader in Earth Science.  The kid speaks English as a second language, but is getting the best grades he has ever gotten.  This is my first year tutoring him.

I swear to god I am not making this up.  (I re-learned what mitosis is.)
 
2013-02-07 04:46:36 PM

Mock26: I suppose that plenty of people here could ask scientific questions that you do not know the answer to, so by your very own reasoning you would be considered dumb, right?


yes

but, most people have played pool, or run into a wall, or been in a car accident, or pushed someone, or tried to block a rushing linesman. basic analogy can be used to guesstimate that moving the moon would require either a REALLY large object, really massive object, really fast object or some combination.

on the other hand, texas is banning the teaching of critical thinking in schools ...


Horsebolt McStabledoor: dark side?
you mean the 'far side' that always faces away from earth but is alternately light and dark as it orbits the earth


It was only added to make bad dark side of the moon reference. Now I have to listen to the album. YAY
 
2013-02-07 04:50:53 PM

Diogenes: SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.

Oh definitely.  But the potential for barbarians and sorcery looks pretty good.

[3.bp.blogspot.com image 425x744]


*damn you so much*
 
2013-02-07 04:55:20 PM
If everyone is done pointing out how stupid everyone is can I ask a question?

Anyone know if there will be anything viewable for this fly by?
 
2013-02-07 04:57:48 PM

crotchgrabber: If everyone is done pointing out how stupid everyone is can I ask a question?

Anyone know if there will be anything viewable for this fly by?


http://en.wikipedia.org/wiki/2012_DA14
 
2013-02-07 04:59:25 PM

Mugato: Why are people so obsessed with the end the world? It's too bad that your life sucks so much that you're praying for the end of the world but it's not going to happen. Not until the sun burns out and that's a period of time that neither you nor I can comprehend. So farking relax about the end of the world and if you're looking forward to it so much, just kill yourself and get it over with.


Well, the Earth will be around for another 5.5 billion years or so. However, humanity will be dead long before then. For instance, in about 1 billion years when the oceans boil away due to the sun getting warmer. Or in 600 million years when c3 photosynthesis will no longer be possible due to the sun's increasing luminosity. That is, assuming a Gamma Ray Burst or asteroid impact doesn't do us in by then.
 
2013-02-07 05:00:32 PM

MyToeHurts: As simple search would have found *this* and other answers to your guestion.


Interesting article, thanks. I would love to read something that details all the math involved, anyone have any good links?
 
2013-02-07 05:01:33 PM

OtherLittleGuy: texdent: Just get Bruce Willis. He'll save us.

He's busy in Moscow.


What about Ben Affleck? Is he busy?
 
2013-02-07 05:18:47 PM

namatad: It is estimated that there are more than a million near-Earth asteroids smaller than 100 meters
If it were to hit Earth in the distant future, it is estimated that it would produce the equivalent of 2.5 of TNT. The has been estimated at 3−20 megatons. Asteroids about 50 meters in diameter are expected to impact Earth once every 1200 years or so.

so pretty much nothing. esp since this thing is tiny and would almost certainly hit the ocean. well about 66% chance of miss.


it's estimated that you're a douche
 
2013-02-07 05:19:44 PM

SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.


Yes.

sarahsaysreadbooks.files.wordpress.com
 
2013-02-07 05:19:47 PM

BigLuca: NotARocketScientist: 3) The moon gets knocked out of orbit by a large asteroid, towards the Earth, causing tidal catastrophe until its orbit decays and we are all farked

Planetary bodies are not pool balls, they can not be knocked any which way. To cause the moon to have an orbit that decays and falls into earth you actually have to decrease its energy and speed it up. (Larger orbits require more energy but the body actually moves slower).  This means that the large asteroid would need to not only bounce off the moon, but take considerably more energy with it than it came in with. This is not likely.


You could also have deterioration of the moon's orbit caused by a black hole passing through the solar system's plane at near-right angles


Ow, my back.
 
2013-02-07 05:23:37 PM

hp6sa: VvonderJesus: [imgs.xkcd.com image 462x316]

I have never understood making fun of someone because they don't know something.  Especially if they are asking so they can learn.

Making fun of the deliberately uninformed, that's different.


Sure, but it takes a big man to admit he took a few college courses that were easy A's just so he could claim everyone else is stupid and mock naive questions.
 
2013-02-07 05:33:45 PM

namatad: ROFL
the fact that you even ASK this question is a sign that the understanding of science in the world ... well most people are dumb.....

b) take out = blow to pieces. well ... this would take a HUGE asteroid moving at a large delta-V. which we would already have seen and know was coming decades in advance.


Just because you had to write a smartass response to someone asking a simple question I'll point at that delta V is acceleration.  What you meant to say was velocity, v.  Acceleration has nothing to do with momentum, momentum is a function of mass and velocity.  You could have an object with a very high acceleration and a comparatively low momentum, or a momentum that is instantaneously zero even.
 
2013-02-07 05:37:54 PM

crotchgrabber: If everyone is done pointing out how stupid everyone is can I ask a question?

Anyone know if there will be anything viewable for this fly by?


That was a stupid pretty damn good question.

Unfortunately we won't be able to view it.
 
2013-02-07 05:47:29 PM

Diogenes: Somacandra: Diogenes: Oh definitely. But the potential for barbarians and sorcery looks pretty good.

From the depths of hell I shake my tiny fist at thee.

A day late and a Mok short ;-)


"a Mok! a Mok! a Mok!"

media.tumblr.com
 
2013-02-07 05:58:51 PM

Cognizer: Diogenes: Somacandra: Diogenes: Oh definitely. But the potential for barbarians and sorcery looks pretty good.

From the depths of hell I shake my tiny fist at thee.

A day late and a Mok short ;-)

"a Mok! a Mok! a Mok!"

[media.tumblr.com image 300x194]


ol' horsie was kinda cute back in the day
 
2013-02-07 06:02:35 PM

namatad: SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.

ROFL
the fact that you even ASK this question is a sign that the understanding of science in the world ... well most people are dumb.

1) "take out the moon" - let's break that down
a) take out = moon magically disappeared, no fragments. poof tides caused by the moon would go away. there would possibly be some residual oscillation, but that would quickly dampen. Quakes caused by this would probably not be an issue. life requiring the tides to survive would suffer. life requiring moonlight for breeding and what no would suffer.
but this would be the best case

b) take out = blow to pieces. well ... this would take a HUGE asteroid moving at a large delta-V. which we would already have seen and know was coming decades in advance. but going with the case
the pieces would SHATTER. some would go up and out, some would come down, some would form an AWESOME asteroid belt/ring around the earth for a rather long time. Satellites would become a thing of the past, along with the space station.

BUT, the pieces which rained down? well we would be farked. even a small percent hitting the earth would royally fark us.

2) the same tiny asteroid missing us but hitting the moon.
MEH
a) there would be moonquakes, which would have no impact on us
b) there would be ejecta, some of which would rain down on the earth, but we are talking much smaller pieces, smaller than the impacting asteroid, and in the end, meh
c) this would only be a problem for us if the impact was on the near side of the moon. if it were on the dark side of the moon, there would be the ringing of many alarms

tl;dr
nothing would happen to us


Yeah, but that's a persona that you put on.
 
2013-02-07 06:02:40 PM

namatad: c) this would only be a problem for us if the impact was on the near side of the moon. if it were on the dark side of the moon, there would be the ringing of many alarms


If an asteroid hit the far side of the moon, it might be a good opportunity to collect some lunar meteorites that we can be almost certain came from the far side of the moon.  None of the Apollo missions landed there, and so far as I know neither did the Russian sample-return mission.
 
2013-02-07 06:03:36 PM

SlothB77: Cthulhu_is_my_homeboy: SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.

Serious, not sure if.


SlothB77: i'm not that bright. see my posts in the politics tab.


Basically, the Moon is huuuuuuge compared to any asteroid that could come near Earth. When people talk about an asteroid hitting the earth and wiping us out, they're not talking about the planet being destroyed. The planet itself would barely even notice, it's just the thin film of trees and people and so on covering the surface that would be obliterated. The kind of asteroid involved is between "apartment building" and "small town" in terms of size. If that hit the moon you'd need a really good telescope to see the impact.
 
2013-02-07 06:04:51 PM

NotARocketScientist: 3) The moon gets knocked out of orbit by a large asteroid, towards the Earth, causing tidal catastrophe until its orbit decays and we are all farked

Planetary bodies are not pool balls, they can not be knocked any which way. To cause the moon to have an orbit that decays and falls into earth you actually have to decrease its energy and speed it up. (Larger orbits require more energy but the body actually moves slower)


Yes, the kinetic energy of the moon would have to decrease, but no, the moon would not have to be sped up. The moon would speed up naturally as it falls toward the earth, and then after it looped around the earth, it would start slowing down again.

This means that the large asteroid would need to not only bounce off the moon, but take considerably more energy with it than it came in with.

the slingshot effect allows bodies to transfer energy between them without having to actually hit each other. However, you can't really transfer a significant percentage of the moon's energy to the asteroid to cause the moon's orbit to change.

A significantly large impact would increase the energy of the moon (as the moon is absorbing the kinetic energy of the asteroid), causing it to orbit further out.
If the asteroid hits the moon in a "head on" collision, the kinetic energy of the moon would be decreased and be converted into heat.

This would change its period and the timing of the tides. Also the tides would be smaller as the gravitational force from the moon would be smaller.

If the moon orbited closer to earth, the tides would be stronger. F=G*m1*m2/r^2 and all that.
 
2013-02-07 06:05:19 PM

namatad: SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.

ROFL
the fact that you even ASK this question is a sign that the understanding of science in the world ... well most people are dumb.

1) "take out the moon" - let's break that down
a) take out = moon magically disappeared, no fragments. poof tides caused by the moon would go away. there would possibly be some residual oscillation, but that would quickly dampen. Quakes caused by this would probably not be an issue. life requiring the tides to survive would suffer. life requiring moonlight for breeding and what no would suffer.
but this would be the best case

b) take out = blow to pieces. well ... this would take a HUGE asteroid moving at a large delta-V. which we would already have seen and know was coming decades in advance. but going with the case
the pieces would SHATTER. some would go up and out, some would come down, some would form an AWESOME asteroid belt/ring around the earth for a rather long time. Satellites would become a thing of the past, along with the space station.

BUT, the pieces which rained down? well we would be farked. even a small percent hitting the earth would royally fark us.

2) the same tiny asteroid missing us but hitting the moon.
MEH
a) there would be moonquakes, which would have no impact on us
b) there would be ejecta, some of which would rain down on the earth, but we are talking much smaller pieces, smaller than the impacting asteroid, and in the end, meh
c) this would only be a problem for us if the impact was on the near side of the moon. if it were on the dark side of the moon, there would be the ringing of many alarms

tl;dr
nothing would happen to us


man, you're a condescending ass.
 
2013-02-07 06:10:29 PM

madgonad: namatad: 2) the same tiny asteroid missing us but hitting the moon.
MEH
a) there would be moonquakes, which would have no impact on us
b) there would be ejecta, some of which would rain down on the earth, but we are talking much smaller pieces, smaller than the impacting asteroid, and in the end, meh
c) this would only be a problem for us if the impact was on the near side of the moon. if it were on the dark side of the moon, there would be the ringing of many alarms

Okay, that just made my whole day.

Anyway, I have a long-standing argument with some 'smart' friends of mine about the moon breaking-up scene in the travesty that is the recent Time Machine movie. My argument was that not only could we NOT break the moon up using subterranean nuclear explosion, but even if we COULD rip the moon in half - it wouldn't break up. It would just pull itself back together again due to gravitational attraction. The amount of energy to move the moon much closer to the earth AND disperse huge chunks of it is simply not going to happen with 'nuclear weapons' of any scale.


This, with the proviso that the initial blast could accelerate fragments out of the moon's gravity well. The total gravity of the moon is the same for a solid body as it is for an aggregate collection of bodies.
 
2013-02-07 06:32:27 PM
oldfarthenry

That's it! I'm buying a military assault weapon to protect me & my family from asteroids!

Not to worry. Obamacare will take care of you.
 
2013-02-07 06:34:12 PM

namatad: SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.

ROFL
the fact that you even ASK this question is a sign that the understanding of science in the world ... well most people are dumb.

1) "take out the moon" - let's break that down
a) take out = moon magically disappeared, no fragments. poof tides caused by the moon would go away. there would possibly be some residual oscillation, but that would quickly dampen. Quakes caused by this would probably not be an issue. life requiring the tides to survive would suffer. life requiring moonlight for breeding and what no would suffer.
but this would be the best case

b) take out = blow to pieces. well ... this would take a HUGE asteroid moving at a large delta-V. which we would already have seen and know was coming decades in advance. but going with the case
the pieces would SHATTER. some would go up and out, some would come down, some would form an AWESOME asteroid belt/ring around the earth for a rather long time. Satellites would become a thing of the past, along with the space station.

BUT, the pieces which rained down? well we would be farked. even a small percent hitting the earth would royally fark us.

2) the same tiny asteroid missing us but hitting the moon.
MEH
a) there would be moonquakes, which would have no impact on us
b) there would be ejecta, some of which would rain down on the earth, but we are talking much smaller pieces, smaller than the impacting asteroid, and in the end, meh
c) this would only be a problem for us if the impact was on the near side of the moon. if it were on the dark side of the moon, there would be the ringing of many alarms

tl;dr
nothing would happen to us


There are no dumb questions just dumb answers.

Not everyone knows much about astrophysics - in fact most people don't. How much do you know about 7th century Chinese art? How would you feel if someone ridiculed you for asking a newbie question about 7th century Chinese art?
 
2013-02-07 06:34:25 PM

WhoGAS: namatad: SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.

ROFL
the fact that you even ASK this question is a sign that the understanding of science in the world ... well most people are dumb.

1) "take out the moon" - let's break that down
a) take out = moon magically disappeared, no fragments. poof tides caused by the moon would go away. there would possibly be some residual oscillation, but that would quickly dampen. Quakes caused by this would probably not be an issue. life requiring the tides to survive would suffer. life requiring moonlight for breeding and what no would suffer.
but this would be the best case

b) take out = blow to pieces. well ... this would take a HUGE asteroid moving at a large delta-V. which we would already have seen and know was coming decades in advance. but going with the case
the pieces would SHATTER. some would go up and out, some would come down, some would form an AWESOME asteroid belt/ring around the earth for a rather long time. Satellites would become a thing of the past, along with the space station.

BUT, the pieces which rained down? well we would be farked. even a small percent hitting the earth would royally fark us.

2) the same tiny asteroid missing us but hitting the moon.
MEH
a) there would be moonquakes, which would have no impact on us
b) there would be ejecta, some of which would rain down on the earth, but we are talking much smaller pieces, smaller than the impacting asteroid, and in the end, meh
c) this would only be a problem for us if the impact was on the near side of the moon. if it were on the dark side of the moon, there would be the ringing of many alarms

tl;dr
nothing would happen to us

Why call people dumb when you just totally ignored what you were writing?

"nothing would happen to us" was your final conclusion yet in the three scenarios, two ...


Do you have any idea how big the asteroid would have to be for that negative scenario?

It'd take something bigger than that comet that left nuclear in Jupiter.
 
2013-02-07 06:36:52 PM

VvonderJesus:


Thank you. It's really farking irritating hearing someone bemoan the state of education while simultaneously ridiculing someone for asking a question.
 
2013-02-07 06:44:26 PM

alwaysjaded: VvonderJesus:

Thank you. It's really farking irritating hearing someone bemoan the state of education while simultaneously ridiculing someone for asking a question.


Physics is rife with dicks who belittle the people around them for getting laid instead of doubling down on the calc homework. This doesn't make them all bad, but it's why I dropped my major and switched to liberal arts.
 
2013-02-07 06:48:02 PM
ftfa: A 45-metre lump of space rock with the destructive power of an H-bomb will narrowly miss Earth a week on Friday.

Just how many weeks will there be on Friday? Is this a time dilation effect?
 
2013-02-07 06:55:07 PM

namatad: if it were on the dark side of the moon


...
 
2013-02-07 07:08:04 PM

pciszek: namatad: c) this would only be a problem for us if the impact was on the near side of the moon. if it were on the dark side of the moon, there would be the ringing of many alarms

If an asteroid hit the far side of the moon, it might be a good opportunity to collect some lunar meteorites that we can be almost certain came from the far side of the moon.  None of the Apollo missions landed there, and so far as I know neither did the Russian sample-return mission.


That would be pretty cool. Of course, I probably wouldn't be able to buy any online because they'd all belong to NASA or something.
 
2013-02-07 07:15:02 PM
www.destinationhollywood.com

Day after Valentine's Day.  Bummer.
 
2013-02-07 07:55:05 PM

NotARocketScientist: 3) The moon gets knocked out of orbit by a large asteroid, towards the Earth, causing tidal catastrophe until its orbit decays and we are all farked

Planetary bodies are not pool balls, they can not be knocked any which way. To cause the moon to have an orbit that decays and falls into earth you actually have to decrease its energy and speed it up. (Larger orbits require more energy but the body actually moves slower).  This means that the large asteroid would need to not only bounce off the moon, but take considerably more energy with it than it came in with. This is not likely.

A significantly large impact would increase the energy of the moon (as the moon is absorbing the kinetic energy of the asteroid), causing it to orbit further out. This would change its period and the timing of the tides. Also the tides would be smaller as the gravitational force from the moon would be smaller.


www.sadgeezer.com
i1264.photobucket.com
 
2013-02-07 08:03:09 PM
Maybe if we all lean to the left,  it will smack us like a biatch, hit us hard, make us cry like a baby until we are vaporized....
it would solve a whole lot of problems
 
2013-02-07 08:09:17 PM

doglover: alwaysjaded: VvonderJesus:

Thank you. It's really farking irritating hearing someone bemoan the state of education while simultaneously ridiculing someone for asking a question.

Physics is rife with dicks who belittle the people around them for getting laid instead of doubling down on the calc homework. This doesn't make them all bad, but it's why I dropped my major and switched to liberal arts.


I would imagine. That xkcd really sums up how I feel. Curiosity is the starting point to intellect and when someone shows a spark, we can't snuff it out. There's too many willfully ignorant as it is.
 
2013-02-07 08:09:45 PM

namatad: crotchgrabber: If everyone is done pointing out how stupid everyone is can I ask a question?

Anyone know if there will be anything viewable for this fly by?

http://en.wikipedia.org/wiki/2012_DA14


When the ISS (international space station) passes over you can see it very clearly. However, it is about 250 miles 'up' and it is highly reflective and almost the size of a football field.

This rock is smaller, probably much lower albedo (less reflective) and at least 70x as far away as the ISS. It will also be moving pretty fast too. I highly doubt the naked eye could make it out, but a decent telescope in dark skies and good viewing could spot it - tracking it might be a pain though.

Think of it as spotting a zebra in your back yard versus spotting a tan dog in a field 2 miles away.
 
2013-02-07 08:21:27 PM
Space rock will pass beneath satellites and will be the nearest miss ever known

isleofran.com
its a near hit, a collision is a near miss
 
2013-02-07 08:27:10 PM

Diogenes: SlothB77: I always hear about astronomers gauging the likelihood something will hit earth.  What if something misses earth, but takes out our moon?  Wouldn't that be pretty bad for us too?  Tides and such as.

Oh definitely.  But the potential for barbarians and sorcery looks pretty good.

[3.bp.blogspot.com image 425x744]


AND SUPERSCIENCE!
 
2013-02-07 08:44:52 PM
COME ON YOU PUSSY ASTEROID!! HIT US!!
 
2013-02-07 08:58:28 PM
The impact sends out a shockwave around the globe, just like a stone thrown into a pool makes a circle of waves. But this wave rolls through the Earth's crust itself, causing death and destruction everywhere. There are massive earthquakes. Huge tsunamis. Volcanoes popping open. Millions die, cities are shaken into oblivion. On the opposite side of our planet, the waves of destruction slam into each other again, causing the earth's crust to tower up, forming a massive mountain-ridge within seconds.
 
2013-02-07 09:07:55 PM
It's Whacking Day.

a4.ec-images.myspacecdn.comspitandspirits.files.wordpress.com
 
2013-02-07 09:08:13 PM
I'm pretty sure you can experiment and try to 'take out' the moon with this program:  http://universesandbox.com .  Runs on Windows, can be bought through Steam. No math required, and you can try lots of things with it.

You can smash galaxies together too, it's fun!
 
2013-02-07 10:54:44 PM
The fact they just discovered this asteroid last year, coupled with the estimated 500,000 others in near earth orbit, suggests we are seriously farked.
 
2013-02-07 11:06:16 PM

Skywolf the Scribbler: 3) The moon gets knocked out of orbit by a large asteroid, towards the Earth, causing tidal catastrophe until its orbit decays and we are all farked


It would take a massive asteroid to knock the moon out of orbit.

I'd be more worried about the sun going supernova.
 
2013-02-07 11:07:56 PM

Private_Citizen: AlwaysRightBoy: Diogenes: If we all die, it will because of all you fornicators having the sex on Valentine's Day.

Don't blame me, I've been married 23 years.

Married 23 years and your handle is "always right boy"? Somethings not adding up here.


Please, just let him have this, okay?
 
2013-02-07 11:31:49 PM

Mister Peejay: Private_Citizen: AlwaysRightBoy: Diogenes: If we all die, it will because of all you fornicators having the sex on Valentine's Day.

Don't blame me, I've been married 23 years.

Married 23 years and your handle is "always right boy"? Somethings not adding up here.

Please, just let him have this, okay?


I'll have it as soon as I get home.

Just took the wife out for dinner and a concert at Carnegie Hall for her birthday.

/the Claude Debussy set was a lot better than the Chopin set
//Orchestra of St. Lukes
 
2013-02-08 12:22:40 AM
IT'S THE MOTHERSHIP!

Break out the KoolAid !
 
2013-02-08 12:59:57 AM

CowboyUpCowgirlDown: The fact they just discovered this asteroid last year, coupled with the estimated 500,000 others in near earth orbit, suggests we are seriously farked.


The article is about as precise as mud. 500,000 objects isn't that many considering the vastness of space within 0.983 and 1.3 astronomical units (the definition of "Near Earth")*. Also, if they're all small like this one, a Tunguska-like boom every thousand years or so isn't so bad (the Tunguska meteorite is estimated to have been twice as wide as this one). Also, just because they are "near" doesn't mean they all have the same probability of intersecting our orbit or even possibly colliding with Earth. And the largest ones are the easiest to see, and we believe we've already found just about all of those.

* The Oort Cloud (between 2000 and 50000 AU) is estimated to have trillions of objects. Space is big.
 
2013-02-08 01:01:13 AM

Skarekrough: Mugato: Why are people so obsessed with the end the world? It's too bad that your life sucks so much that you're praying for the end of the world but it's not going to happen. Not until the sun burns out and that's a period of time that neither you nor I can comprehend. So farking relax about the end of the world and if you're looking forward to it so much, just kill yourself and get it over with.

Lookit....I just need to know if now is the time I take a dump on the boss' desk and tear through my remaining life savings on escorts and top-shelf bourbon.


YES.

Yes it is, dammit ....... and take pictures.
 
2013-02-08 03:12:52 AM
"The mini asteroid will fly BENEATH satellites on February 15, missing us by 15,000 miles, the nearest ever known."
Which satellites would these be, and in what sense would it be beneath them?!
Is it suggesting somehow this rock is going to pass between an orbitting man made satellite and earth - cos if it is, those frkkers are not 15000 miles away!
 
2013-02-08 04:47:59 AM
so your saying i need a Valentine's date by friday or else i'm dying in the flood?

fark that i'm gonna stick to jerking off
 
2013-02-08 06:12:17 AM

WhoGAS: yet in the three scenarios, two would affect us in quite negative ways


Two would require asteroids far larger, traveling at speeds far faster than this one.  He said so, right here:

namatad: b) take out = blow to pieces. well ... this would take a HUGE asteroid moving at a large delta-V. which we would already have seen and know was coming decades in advance. but going with the case


So um...  there you go.
 
2013-02-08 06:47:30 AM

machoprogrammer: Well, the Earth will be around for another 5.5 billion years or so. However, humanity will be dead long before then. For instance, in about 1 billion years when the oceans boil away due to the sun getting warmer. Or in 600 million years when c3 photosynthesis will no longer be possible due to the sun's increasing luminosity. That is, assuming a Gamma Ray Burst or asteroid impact doesn't do us in by then.


Even sooner than that.  Carl Sagan liked to point out that in a million years, there won't be any humans regardless: we'll either have gone extinct, or have evolved into something else.

Humbling for sure.
 
2013-02-08 06:53:34 AM

namatad: but, most people have played pool, or run into a wall, or been in a car accident, or pushed someone, or tried to block a rushing linesman. basic analogy can be used to guesstimate that moving the moon would require either a REALLY large object, really massive object, really fast object or some combination.


And yet, the connection between everyday things like those and what seems like astronomical common sense is hard to come by, if for no other reason than the sheer difference in scale.

I'm a smart guy (I think).  I remember the eye-opening I received in Physics 101, when it was pointed out what the common phrase, "Every action has an equal and opposite reaction," really meant.  We were shown how when you push something, it pushes back.  We experience this effect every day of our lives, so it should be common sense, right?  But who really thinks of it like that?  Once it was spelled out for me, I never thought of pushing things the same way again.

There is nothing wrong with asking questions.  You were a learner once too, and hopefully still are.  "When you're done learning, you're done."  I guarantee that if you're being honest, you once thought that the moon could be "blown up" too.  It was only after you received a certain kind of education - something not everyone gets or even have the opportunity to get - that you knew better (or rather, knew what it would take, since it is indeed possible).
 
2013-02-08 07:02:11 AM

sminkypinky: "The mini asteroid will fly BENEATH satellites on February 15, missing us by 15,000 miles, the nearest ever known."
Which satellites would these be, and in what sense would it be beneath them?!
Is it suggesting somehow this rock is going to pass between an orbitting man made satellite and earth - cos if it is, those frkkers are not 15000 miles away!


Geostationary satellites are about 22,236 miles away from Earth's surface.
 
2013-02-08 09:38:07 AM

NotARocketScientist: Planetary bodies are not pool balls, they can not be knocked any which way.


"Even if it's only a dream, it's a pretty horrible idea," said Mella, "destroying a world just to make a bypass."

"Oh, I've heard of worse," said Ford, "I read of one planet off in the seventh dimension that got used as a ball in a game of intergalactic bar billiards. Got potted straight into a black hole. Killed ten billion people."

"That's mad," said Mella.

"Yes, only scored thirty points too."
 
2013-02-08 03:45:31 PM

ElBarto79: Just because you had to write a smartass response to someone asking a simple question I'll point at that delta V is acceleration.  What you meant to say was velocity, v.  Acceleration has nothing to do with momentum, momentum is a function of mass and velocity.  You could have an object with a very high acceleration and a comparatively low momentum, or a momentum that is instantaneously zero even.


Delta-v in spacetalk is a change-in-velocity "budget" (a method of planning fuel use for orbital maneuvers) rather than acceleration. More "difference between velocities" than "change in velocity per unit time". Regardless, you are correct that the original poster probably just meant that the rock would have needed great velocity (relative to the moon) to have much impact.
 
2013-02-08 03:51:49 PM
I liked the AP article, http://hosted.ap.org/dynamic/stories/U/US_SCI_CLOSEST_ASTEROID?SITE=A P &SECTION=HOME&TEMPLATE=DEFAULT .  It has more information.


Instead of merely deflecting asteroids away from the Earth, I think we should deflect them into orbit around the Earth.  Then, NASA or private companies could send miner astronauts or miner drones out to them to mine rare earths, or whatever they contain.
 
2013-02-08 04:41:18 PM

Charlie Chingas: YixilTesiphon: Skywolf the Scribbler: 3) The moon gets knocked out of orbit by a large asteroid, towards the Earth, causing tidal catastrophe until its orbit decays and we are all farked

No. That isn't going to happen. There just aren't that many thing that are that big in the Solar System anymore.

[upload.wikimedia.org image 632x521]

Sedna isn't coming by to party, either.

You forgot to list your mom...


LOL ... good one.
 
2013-02-08 04:47:21 PM

hp6sa: VvonderJesus: [imgs.xkcd.com image 462x316]

I have never understood making fun of someone because they don't know something.  Especially if they are asking so they can learn.



Guess you're not an asshole. What are you doing on Fark?
 
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