"Cold suns, warm exoplanets and methane blankets" Topic
5 Posts
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| Tango01 | 12 Dec 2017 12:55 p.m. PST |
"Somewhere in our galaxy, an exoplanet is probably orbiting a star that's colder than our sun, but instead of freezing solid, the planet might be cozy warm thanks to a greenhouse effect caused by methane in its atmosphere. NASA astrobiologists from the Georgia Institute of Technology have developed a comprehensive new model that shows how planetary chemistry could make that happen. The model, published in a new study in the journal Nature Geoscience, was based on a likely scenario on Earth three billion years ago, and was actually built around its possible geological and biological chemistry. The sun produced a quarter less light and heat then, but Earth remained temperate, and methane may have saved our planet from an eon-long deep-freeze, scientists hypothesize. Had it not, we and most other complex life probably wouldn't be here today…."
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| Mithmee | 12 Dec 2017 1:10 p.m. PST |
Maybe but strike a match on that planet and sees what happens. |
| Tango01 | 13 Dec 2017 11:23 a.m. PST |
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| Martin From Canada | 13 Dec 2017 11:42 a.m. PST |
Maybe but strike a match on that planet and sees what happens.
Methane is REALLY potent as a GHG. This is way below the needed vapor density for conflagration… |
| Golgoloth | 13 Dec 2017 2:22 p.m. PST |
Methane blanket … Hehehe … Is that something like a Dutch Oven? :) |
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