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(Tech Stew)   Astronomers discover a potentially habitable Super-Earth 42-light years from Earth   (tech-stew.com) divider line 94
    More: Cool, light-years, Earth, population of the world, astronomers, University of Hertfordshire, Goldilocks, rocky planet, data analysis  
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3843 clicks; posted to Geek » on 08 Nov 2012 at 4:24 PM (2 years ago)   |  Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



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2012-11-08 12:52:00 PM  
I'm just saying that when we die there's going to be a planet for the French, a planet for the Chinese, and we'll all be a lot happier.
 
2012-11-08 01:04:23 PM  
So with our present technology, solar sails, radiaoactivaty, the whole thing: how many generations would it take us to get there?
 
2012-11-08 01:06:21 PM  
7 times as large as the earth - I don't think you fools understand the gravity of this situation...
 
2012-11-08 01:10:03 PM  

Elzar: 7 times as large as the earth - I don't think you fools understand the gravity of this situation...


It's all about density. A planet can be seven times bigger, but if it's density remained the same as Earth's the gravity might not change all that much, because the surface farther from the center of mass.
 
2012-11-08 01:13:06 PM  
For example, Saturn has many times the mass of Earth, and is vastly larger, but if you could stand on the "surface" the gravity you would experience is only about 0.9G
 
2012-11-08 01:17:12 PM  
Sorry for the multiple posts, but I love this stuff. Saturn is kind of cool in that there are probably places in the atmosphere where the pressure and temperature are very close to that of Earth, although the atmospheric composition would be quite different. Theoretically you could build floating habitats that all you would really need to provide is air, which is a great deal easier than dealing with vacuum or extremely cold or hot environments.
 
2012-11-08 01:45:38 PM  

kimwim: So with our present technology, solar sails, radiaoactivaty, the whole thing: how many generations would it take us to get there?


~700,000 years
 
2012-11-08 01:48:51 PM  
PREPARE THE GENERATION SHIPS.
 
2012-11-08 02:01:50 PM  

TheHighlandHowler: kimwim: So with our present technology, solar sails, radiaoactivaty, the whole thing: how many generations would it take us to get there?

~700,000 years


That sounds about right. Last time I ran the numbers, the fastest proposed propulsion system currently under serious study would go 20 light years in about 47,000 years. So if we throw in a bit of semi-plausible sci-fi, we might be able to get the one-way trip to this place under 100,000 years.
 
2012-11-08 02:13:57 PM  
so 700,000 years is about 100,000 years?
 
2012-11-08 02:46:24 PM  

kimwim: So with our present technology, solar sails, radiaoactivaty, the whole thing: how many generations would it take us to get there?


Project Daedalus estimated top speed of 10-12% c. or around 400 years. Long enough so that the travelers would probably be passed by faster technologies on the way out.
 
2012-11-08 03:23:43 PM  

kimwim: so 700,000 years is about 100,000 years?


He was talking current technology. I was talking sci-fi technology.
 
2012-11-08 03:44:00 PM  

Jubeebee: kimwim: so 700,000 years is about 100,000 years?

He was talking current technology. I was talking sci-fi technology.


If you mix sci-fi tech with magic does it get to 50k? Someone get QA in here and ask him if we can borrow his life extension tech so we can live long enough to experience it. Then both our dreams can be realised!
 
2012-11-08 04:18:36 PM  

Jubeebee: So if we throw in a bit of semi-plausible sci-fi, we might be able to get the one-way trip to this place under 100,000 years.


Nate Silver says we'll make contact on September 18, 175382.

(Under the old calendar. At the time it will be the 12th of Zzylk-12 in the 654th Rotation of the Gujikkan Empire)
 
2012-11-08 04:25:39 PM  
img546.imageshack.us 
/how many light years away?
 
2012-11-08 04:27:14 PM  

Slaxl: I'm just saying that when we die there's going to be a planet for the French, a planet for the Chinese, and we'll all be a lot happier.


What about the apes?
 
2012-11-08 04:30:35 PM  

Elzar: 7 times as large as the earth - I don't think you fools understand the gravity of this situation...


If only there were some kind of density thingy and mass thingy which could be used to calculate the gravity.

7 times as large is not the same as 7 times the mass.
 
2012-11-08 04:31:28 PM  
They don't even know it's not a freaking gas-ball. The "super earth" speculation seems to serve no purpose but to get people to pay attention to what would otherwise be fairly mundane.
 
2012-11-08 04:32:01 PM  
Overall its radius is between 1.9 and 2.5 that of Earth's radius and 7 times as massive, at least on some calculations. Depending on the density of the planet and its size, it could actually have the same surface gravity as the Earth, meaning if you stood on HD 40307G you would weigh the same as here on Earth.
 
2012-11-08 04:39:14 PM  

namatad: Elzar: 7 times as large as the earth - I don't think you fools understand the gravity of this situation...

If only there were some kind of density thingy and mass thingy which could be used to calculate the gravity.

7 times as large is not the same as 7 times the mass.


In this case it is, they don't know its size only its mass, and I don't think a planet of that mass could maintain a low enough density for human habitation.
 
2012-11-08 04:42:59 PM  

Slaxl: Jubeebee: kimwim: so 700,000 years is about 100,000 years?

He was talking current technology. I was talking sci-fi technology.

If you mix sci-fi tech with magic does it get to 50k? Someone get QA in here and ask him if we can borrow his life extension tech so we can live long enough to experience it. Then both our dreams can be realised!


Yeah but then you need to get Orakio's Sword to defeat Dark Force that is buried in the lake temple on your generation ship.
 
kab
2012-11-08 04:43:05 PM  
FTA: "The new planet"

It's not 'new', dipshiats. You simply hadn't stumbled across it yet.
 
2012-11-08 04:46:00 PM  

Rev.K: PREPARE THE GENERATION SHIPS.


JoeJim is looking forward to his new home, and wondering if anybody has the Hensel twins phone numbers.
 
2012-11-08 04:46:08 PM  
Trust me, it's a dump.
 
2012-11-08 04:51:06 PM  

SacriliciousBeerSwiller: They don't even know it's not a freaking gas-ball. The "super earth" speculation seems to serve no purpose but to get people to pay attention to what would otherwise be fairly mundane.


Maybe the freaking gas-ball has several earth-size moons ...?
 
2012-11-08 04:53:06 PM  

SacriliciousBeerSwiller: They don't even know it's not a freaking gas-ball. The "super earth" speculation seems to serve no purpose but to get people to pay attention to what would otherwise be fairly mundane.


A few years ago the tech to discover exoplanets didn't even exist, and now it's just "mundane?"

Holy shiat.

/no words
 
2012-11-08 04:53:47 PM  
Dibs!
 
2012-11-08 04:59:13 PM  

NowhereMon: For example, Saturn has many times the mass of Earth, and is vastly larger, but if you could stand on the "surface" the gravity you would experience is only about 0.9G


Still part of what makes earth habitable is that it has a magnetic field that shields us from radiation. If the planet lacks density then it probably doesn't have the iron core that generates the magnetic field we enjoy. But who knows maybe the intensity of the star it's orbiting isn't that of our own sun so it can support life with less of a magnetic field.

It also may not be unfeasible that we could withstand 7 times the gravity. You'd of course suffer joint problems but smaller lighter stronger individuals would have an advantage; possibly causing adaptation of the species to occur after a few generations.
 
2012-11-08 04:59:44 PM  
If we assume the composition is roughly Earth-like, then 7 times the mass means a radius 1.913 times that of Earth (cube root of 7). Gravity decreases by the square of distance, so being 1.913 times further away translates into a multiplier of 1/(1.9132), or 0.2733. Multiply that by the 7 masses and you get 1.913 gravities.

Which would have been a lot simplier if I'd just looked up the Wikipedia article on surface gravity: ...for fixed mean density, the surface gravity g is proportional to the radius r.
 
2012-11-08 05:01:01 PM  
Lots of mights and could be's in that article. I'm surprised they didn't say how long it's day is, or how much water is in its oceans. You know, if there's really even a planet there.

Remember Zarmina?
 
2012-11-08 05:02:44 PM  

midigod: SacriliciousBeerSwiller: They don't even know it's not a freaking gas-ball. The "super earth" speculation seems to serve no purpose but to get people to pay attention to what would otherwise be fairly mundane.

A few years ago the tech to discover exoplanets didn't even exist, and now it's just "mundane?"

Holy shiat.

/no words


Now that we have it, we are scanning star systems faster than human eyes can interpret the data. According to wikipedia, as of today, there are 846 known exoplanets. As of February of this year, there were 2,321 possible candidates still to be examined. It seems like more are added every week.

So, yeah. Old & busted: random exoplanets; New Hotness: earth-like exoplanets
 
2012-11-08 05:07:18 PM  
Sounds fat. Do not want.
 
2012-11-08 05:09:07 PM  

SacriliciousBeerSwiller: They don't even know it's not a freaking gas-ball. The "super earth" speculation seems to serve no purpose but to get people to pay attention to what would otherwise be fairly mundane.


Totally. Nothing more mundane than finding a planet in the habitable zone of a relatively nearby star. Those scientists are such attention whores.
 
2012-11-08 05:11:46 PM  

cgraves67: Now that we have it, we are scanning star systems faster than human eyes can interpret the data. According to wikipedia, as of today, there are 846 known exoplanets. As of February of this year, there were 2,321 possible candidates still to be examined. It seems like more are added every week.


There's an iApp for that. It get updates all the time. "Exoplanet" or something.
 
2012-11-08 05:18:00 PM  
I thought it was 27 light years away
At least that's what NdGT said...
img.gawkerassets.com
 
2012-11-08 05:21:19 PM  

NowhereMon: kimwim: So with our present technology, solar sails, radiaoactivaty, the whole thing: how many generations would it take us to get there?

Project Daedalus estimated top speed of 10-12% c. or around 400 years. Long enough so that the travelers would probably be passed by faster technologies on the way out.


physics much?

/hint: you might want to think about acceleration.
 
2012-11-08 05:26:55 PM  

KarmicDisaster: Trust me, it's a dump.


Well, ever since that General Zod took over. Me, I'm looking for that cube shaped planet. Me hear am worst planet there is.
 
2012-11-08 05:28:31 PM  

midigod: SacriliciousBeerSwiller: They don't even know it's not a freaking gas-ball. The "super earth" speculation seems to serve no purpose but to get people to pay attention to what would otherwise be fairly mundane.

A few years ago the tech to discover exoplanets didn't even exist, and now it's just "mundane?"

Holy shiat.

/no words


Well then, no need to lead with the "super-earth" bullsh*t, no? And yet...
 
2012-11-08 05:29:55 PM  
Ah, another "earth like planet" prediction. Some radio telescope picks up emmisions from a star, those emissions change a little bit in what seems like regular intervals.

And from that sliver of possible data, writers generate these fantastical claims of planets with liquid water, livable temperatures, correct gravity, etc.


They don't actually know any of this. They don't even have much reason to suspect any of it. Just like every other prediction of planets light years away. They've got some radio waves. That's it.
 
2012-11-08 05:30:53 PM  

Erix: SacriliciousBeerSwiller: They don't even know it's not a freaking gas-ball. The "super earth" speculation seems to serve no purpose but to get people to pay attention to what would otherwise be fairly mundane.

Totally. Nothing more mundane than finding a planet in the habitable zone of a relatively nearby star. Those scientists are such attention whores.


Snark all you want, but it doesn't change the fact that the headline and the article title are both misleading, and for obvious reasons ("we gotta spice this up so the unwashed masses will notice!"). You know what I meant, and you know damn well I'm right,
 
2012-11-08 05:31:51 PM  

taurusowner: Ah, another "earth like planet" prediction. Some radio telescope picks up emmisions from a star, those emissions change a little bit in what seems like regular intervals.

And from that sliver of possible data, writers generate these fantastical claims of planets with liquid water, livable temperatures, correct gravity, etc.


They don't actually know any of this. They don't even have much reason to suspect any of it. Just like every other prediction of planets light years away. They've got some radio waves. That's it.


Thank you. Another rational person.
 
2012-11-08 05:32:18 PM  

Elzar: 7 times as large as the mass of the earth - I don't think you fools understand the gravity of this situation...


Worded incorrectly, but you are correct in that thought. Once again I take exception to what the scientists are calling "habitable."

Your average adult would weigh well over 1000 lbs [insert fat joke here].
 
2012-11-08 05:33:31 PM  

taurusowner: Ah, another "earth like planet" prediction. Some radio telescope picks up emmisions from a star, those emissions change a little bit in what seems like regular intervals.

And from that sliver of possible data, writers generate these fantastical claims of planets with liquid water, livable temperatures, correct gravity, etc.


They don't actually know any of this. They don't even have much reason to suspect any of it. Just like every other prediction of planets light years away. They've got some radio waves. That's it.


But this is what those radio waves were....
 
2012-11-08 05:35:16 PM  
Are they going to call it Levram?
 
2012-11-08 05:37:06 PM  
That planet holds the answer to life the universe and everything
 
2012-11-08 05:37:11 PM  
Headline/Article title: "Astronomers discover a potentially habitable Super-Earth HD 40307g"

Article content: "Tuomi went on to say that there is a 50 percent chance that HD 40307g would be a rocky planet like Earth, but there is insufficient data to know whether its a large Earth or a warm gaseous planet like Neptune."

Title is bullsh*t, and people who defend it are a discredit to science. Science should be able to stand on its own without resulting to Fox News tactics.
 
2012-11-08 05:37:24 PM  

Elzar: 7 times as large as the earth - I don't think you fools understand the gravity of this situation...


Heavy.
 
2012-11-08 05:39:51 PM  

kimwim: So with our present technology, solar sails, radiaoactivaty, the whole thing: how many generations would it take us to get there?


At 1G constant acceleration/deceleration, the ship's crew would arrive in 7 years. For us on Earth, they would arrive in about 43 years.

Time dilation rawks.
 
2012-11-08 05:40:52 PM  
I think you guys are missing an important detail... it is 42 light years away, the question waits for us there!
 
2012-11-08 05:40:52 PM  

Theory Of Null: That planet holds the answer to life the universe and everything


i50.tinypic.com

Forty-Two!
 
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