xkcd #3318: Earth Sized Planets
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It probably has an icy mantle over the real silicate geology, but I’m hoping something weird happened to burn off most of the water like with Io.
Transcript:
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Source: https://xkcd.com/3318/
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It’s really weird that Venus doesn’t have them, but are we sure about Europa?
Isn’t that because it doesn’t have a large moon constantly kneading the planet with tidal forces?
That’s my understanding. The moon is probably why we have plate tectonics, and plate tectonics is probably why our surface contains all the elements for life.
So in other words, a relatively massive moon orbiting relatively close may be the secret to why there’s life on earth. (Also, the planet needs to be not tidally locked to that moon)
What if life just deems it too boring to exist if the planet doesnt have solar eclipses
Another equally plausible explanation!
There’s a earth sized object on the outer solar system?
“if”
