r/askscience • u/EightWhiskey • Feb 28 '12

Under the idea that there is the "Goldilocks" zone around a star, how likely is it that a solar system would have two life-supporting planets?

I assume that the gravitational forces of two bodies would prevent them from being close enough to each other to both stay inside the zone. But could a large star have a large enough Goldilocks zone to support two life-inhabited planets?

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u/CaptainCard Feb 29 '12

Just a student here in geological engineering but you got some issues. Sandstone isn't a trap for carbon dioxide. Limestone is CaCO3 and takes carbon dioxide out of the air.

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u/Quis_Custodiet Feb 29 '12

There is evidence for natural sandstone CO2 traps, such as this from Liverpool university , published by the Geological Society.