Space/Science — HabitableZone

Space/Science » in reply to Where are you at on Very Large Impacts and Mars?

Nemesis theory?

I think this is what you're referring to, in terms of the 26 million year cycle:

http://www.columbia.edu/~kvr10/theory.html

But if this small companion star really existed, couldn't Hubble spot it? Honestly, how strong is the evidence for this theory? You'd think it would be pretty clear from the study of lunar cratering...

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