Why is Venus hell and Earth an Eden?
quantamagazine.org
Why is Venus hell and Earth an Eden?
1–10 of 358 posts
Re: Why is Venus hell and Earth an Eden?
#2And once the water was in Venus' atmosphere, it could reach high altitude, where it would be dissociated by solar radiation. The hydrogen could then escape to space. The signature of this remains in the isotope ratio of deuterium to ordinary hydrogen in the atmosphere there: deuterium enriched by two orders of magnitude above the level seen on Earth.
Re: Why is Venus hell and Earth an Eden?
#3Because of the distance from the sun
Re: Why is Venus hell and Earth an Eden?
#4Because of the distance from the sun
Quite. Its just so.
Re: Why is Venus hell and Earth an Eden?
#5Because of the distance from the sun
That’s part of it but the dense CO2 atmosphere is the major issue. Don’t worry, we are trying to get there as fast as we can to Hell as well.
Re: Why is Venus hell and Earth an Eden?
#6Because of the distance from the sun
Venus's albedo is so high that the insolation at the surface is even less than Earth's. Yet it's hotter than Mercury, which is closer to the sun than Venus.
The article says that volcanism is the reason, and that solar heating would not cause this result on its own, even though it's everyone's first guess.
Re: Why is Venus hell and Earth an Eden?
#7Re: Why is Venus hell and Earth an Eden?
#8Venus does not have a molten core, and there is no magnetic field protecting the atmosphere from the solar winds.
This is not likely the sole reason, but it must be a factor.
Mercury does have a magnetic field, Mars does not.
Re: Why is Venus hell and Earth an Eden?
#9Venus does not have a molten core, and there is no magnetic field protecting the atmosphere from the solar winds. This is not likely the sole reason, but it must be a factor. Mercury does have a magnetic field, Mars does not.
Venus is thought to have a (at least partially) molten core.
It doesn't have a magnetic field, but that could be due to the slow rotation.
Re: Why is Venus hell and Earth an Eden?
#10Even in the Goldilocks zone a planet still need so many specific things going for it to be the paradise Earth is. Anthropic principle strikes again!