Planetary collisions happen *all the time*. All of Mercury, Venus, Earth, and Ma... | Hacker News

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		quotemstr 4 months ago \| parent \| context \| favorite \| on: Earth was born dry until a cosmic collision made i... Planetary collisions happen all the time. All of Mercury, Venus, Earth, and Mars in our solar system had them. We can see their signatures in other solar systems too: see https://en.wikipedia.org/wiki/List_of_extrasolar_planetary_c... Whatever the great filter is, it's not planetary-scale collisions during the accretion phase of solar system formation.

mr_toad 4 months ago [–]

A couple of dozen collisions out of 6000+ known exoplanets. Not exactly common, but not freakishly rare either.

quotemstr 4 months ago | [–]

Those are just the ones we caught in the act. That we can see 6,000+ means that there are many more we don't see.

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