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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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9511 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.
 
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