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Comments on New Earth Detected Around Gliese 581
Remarkable find by astronomers demonstrates that extrasolar Earth-like planets are not just fiction. (Read
the complete story)
"WOULD THE EXTRA MASS POSSIBLY BE RADIOACTIVE TO KEEP THE SURFACE TEMP SO WARM SINCE IT IS SO FAR FROM ITS SUN?"
(HEINLEIN, A.L. 4/26/2007 2:48:38 PM) |
"Maybe, but I believe they calculated the mean temperature range by calculating it's orbit and distance from Gliese 581, then comparing that with the star's known luminosity and spectral type.
I'd suspect a planet in such close orbit, around such an old star would probably be tide-locked (like our moon) and present one face permanently towards Gliese 581.
It's larger mass also would make me wager it's got a thick Venus-like atmosphere.
However, this is still exciting because it proves "Earth-like" small rocky planets are common in the galaxy.
"
( 4/26/2007 5:16:15 PM) |
"The question about its atmosphere got to me too. If the planet's atmosphere was anything like Mars or Venus, life couldn't possibly exist on it."
(bill 4/30/2007 1:34:59 PM) |
"... because of the heat trapping qualities of CO2, of course."
(bill 4/30/2007 1:37:05 PM) |
Get more information on New Earth Detected Around Gliese 581
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