Re: May 2011:The Discovery of Pandora/Earth 2.0: Earth 2.0 Announced! - Tree of Souls - An Avatar Community Forum
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Old 05-17-2011, 10:18 PM
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Default Re: May 2011:The Discovery of Pandora/Earth 2.0: Earth 2.0 Announced!

Back in September I made a post which said that the first habitable exo-planet would be found in May 2011. The predictions proved true as of today as Gliese 581d was announced as the first habitable exo-planet discovered in the Universe.

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A super-Earth exoplanet, Gliese 581d, a rocky world orbiting a red dwarf star called Gliese 581, located around 20 light years from Earth, which makes it one of our closest neighbors, has been confirmed as the first planet outside our solar system to meet key requirements for sustaining life. Astronomers' modelling of planet shows it has the potential to be warm and wet enough to nurture Earth-like life, they said.

liese 581d orbits on the outer fringes of the star's "Goldilocks zone," where it is not so hot that water boils away, nor so cold that water is perpetually frozen. Instead, the temperature is just right for water to exist in liquid form.
"With a dense carbon dioxide atmosphere -- a likely scenario on such a large planet -- the climate of Gliese 581d is not only stable against collapse but warm enough to have oceans, clouds and rainfall," said France's National Centre for Scientific Research (CNRS).

More than 500 planets orbiting other stars have been recorded since 1995, detected mostly by a tiny wobble in stellar light.

Until now, the big interest in Gliese 581's roster of planets focussed on Gliese 581g. It leapt into the headlines last year as "Zarmina's World," after its observers announced it had roughly the same mass as Earth's and was also close to the Goldilocks zone, which has since been discounted by many experts. Some experts suspect that the Gliese 581g may not even exist but was simply a hiccup in starlight.

Its big brother, Gliese 581d, has a mass at least seven times that of Earth and is about twice our planet's size, according to the new study, which appears in a British publication, The Astrophysical Journal Letters.

The planet, spotted in 2007, had initially been dismissed as a candidate in the hunt for life.
It receives less than a third of the solar radiation Earth gets, and may be "tidally locked," meaning that one side of it always faces the sun, which would give it permanent dayside and nightside.

But the new model, devised by CNRS climate scientists Robin Wordsworth, Francois Forget and colleagues, showed surprising potential. Its atmosphere would store heat, thanks to its dense CO2, a greenhouse gas, warmed by the red light from the star.

"In all cases, the temperatures allow for the presence of liquid water on the surface," say the researchers. For visting space explorers, though, Gliese 581d would "still be a pretty strange place to visit," the CNRS said. "The denser air and thick clouds would keep the surface in a perpetual murky red twilight, and its large mass means that surface gravity would be around double that on Earth."

A spaceship traveling close to light speed would take more than 20 years to get there, while our present rocket technology would take 300,000 years.
"Super-Earth" Exo-Planet Found to Meet Key Crtieria for Life

So what do you think of this announcement? Do you think life exists on this planet? I sure hope so.
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Old 05-17-2011, 10:40 PM
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Originally Posted by Dreaming Of Pandora View Post
Do you think life exists on this planet? I sure hope so.
I would love to know!

One of my main goals in life--unfortunately mostly out of my control--is to stay alive long enough to receive confirmation of extraterrestrial life.
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Old 05-17-2011, 10:48 PM
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20 years?!

At near light speed, too...we'd need to pull off some Star Trek-type stunts to get there...
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Old 05-17-2011, 10:48 PM
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Great news!

Now we need to actually go there though, or it's all for nothing ...
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Old 05-17-2011, 10:58 PM
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Originally Posted by Raiden View Post
20 years?!

At near light speed, too...we'd need to pull off some Star Trek-type stunts to get there...
Nahhh... Pretty soon, all the research at the Large Hadron Collider will teach us how to produce an anti-Higgs beam (that is, after it proves the Higgs boson exists--surely any day now, right? ). It's all over after that.
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Old 05-18-2011, 01:36 AM
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This high gravity will make you hard...


Y'know, I think I would be OK in 2g. Running and climbing might be out but for general activities I could probably cope.

Last edited by ISV Venture Star; 05-18-2011 at 01:41 AM.
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Old 05-18-2011, 07:37 AM
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oh wow......they actually ****ing did it...... they found another earth....!!!!!
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Old 05-18-2011, 08:07 AM
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YEEEEEEEEES! We always knew that somewhere out there there would be a Pandora, this must surely be it. Even though we've found it, I kind of don't want us to ever reach it - it's pure and free of human taint and long may it stay that way.
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Old 05-18-2011, 07:30 PM
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Originally Posted by The Silver Stag View Post
YEEEEEEEEES! We always knew that somewhere out there there would be a Pandora, this must surely be it. Even though we've found it, I kind of don't want us to ever reach it - it's pure and free of human taint and long may it stay that way.
This.

These were my first thoughts.

However, all we know about it is that it is "warm and wet".

This could mean anything, from a primitive sea of algae and protists, to a varied biosphere like our own, or perhaps a planet consumed by cities created by their advanced inhabitants, not unlike the future predicted by JC himself.

The other thing is, gravity would be seven times stronger there. Eating cold cereal in the morning or drinking a mug of coffee would be a workout. Anything that lives there is either very strong, or it has hard bones, or it may even be flat.

Heck, it could have rainforests made of moss, since it would be so tough for much of anything to grow very tall.
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Old 05-18-2011, 08:50 PM
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Originally Posted by ISV Venture Star View Post
This high gravity will make you hard...


2g might well be a bit of a problem day to day, but not uninhabitable.

Of course, I would love for humans to go there and find a sentient species welcoming them
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Old 05-18-2011, 10:17 PM
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just saying that we know next to nothing of this planet. Not a picture even, just measurements of the "wobble" of the light spectrum of the star. What we know is the distance to the star, the rotation period and the mass. It is as of yet even uncertain if there is at all an atmosphere or water.
So the potential for life as we know it is there. If it exists, we'd know it once there can be measurements of the atmosphere. If it does not have life, it would be methane, CO2 and N2 mostly. If there is life, the "geologic atmosphere" would be replaced by something different, that would be interesting indeed.
I'd prefer 0.7g over 2g though. 2g is tough to move around without something like a powered exoskeleton or such...

Do they have a plan how to get more information on these exoplanets?
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Old 05-19-2011, 04:44 AM
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They can make estimates from detailed observation, but the only want to be completely certain is to go there... that means a probe, of course, but governments are too worried about costs and not thinking about the possibilities of finding Earthlike planets
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Old 05-19-2011, 08:43 AM
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As long as they would cut it from military spending and not from the spending on helping the "earthlike" planet we live on, I would not even object too much (Though I'd rather see that effort go into keeping our own home in a good state). I am not up to date - was there not some kind of space-observatory being planned that could analyze the spectrum of the atmosphere of exoplanets? Or was that just Scientists dreaming?
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Old 05-23-2011, 08:30 AM
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I forgot about this. That's awesome! Is that a real picture?
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Old 05-23-2011, 08:33 AM
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Quote:
Originally Posted by auroraglacialis View Post
As long as they would cut it from military spending and not from the spending on helping the "earthlike" planet we live on, I would not even object too much
US military budget is approx 20 times the size of NASA's budget.
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