Questions tagged [planets]

For questions about any large astronomical bodies classified as planets, and their effects on their systems.

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Plausibility of helium dominated atmospheres on super-Earths

I've been using this helpful diagram a lot for worldbuilding. Now I came to think about the fact that helium is more massive than hydrogen, thus a scenario where hydrogen escapes, but helium is ...
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Plants and Animals “Switch Places” - How Could This Have Happened?

Setting the Scene Say that you have a planet where, like on Earth, you have a taxonomic branch of its overall "Tree of Life" graph that has all the traits we associate with the "Plant" Kingdom on our ...