4 ms·
Runaway greenhouse gas process? Maybe if the same thing that happened on Venus happens on the outer SS? See the chart here: https://physics.stackexchange.com/q
by Chris2048 3y ago
Runaway greenhouse gas process? Maybe if the same thing that happened on Venus happens on the outer SS?
See the chart here: https://physics.stackexchange.com/q/615311 https://physics.stackexchange.com/q/615311
Earth is average 287 Kelvin. Mars can just about keep hold of all CO2 at that temperature. A smaller body would need to be colder to hold on to the same materials, or some other method of reducing escape.
- krisoft 3y ago> Runaway greenhouse gas process? Unlikely. The moons of Uranus appear to not have atmospheres. There is this cool paper[1] about how they measured the lack of atmosphere for one of the moons (Titania). They measured carefully the light of a star as the moon occluded it. If there were atmosphere there they would have seen it. No atmosphere, no runaway greenhouse gas process. At least not how we know it. https://hal.science/hal-00506795/document https://hal.science/hal-00506795/document
- Chris2048 3y agoThat's implied by the charts linked - the moons are not large enough to hold onto an atmosphere, Mars-sized seems to be around the limit. The point I'm responding to is "It's too cold out there". Maybe an earth-size planet with an atmosphere like Venus would still be warm?