I'm confused as to why this is coming up now, did they find some new evidence or... | Hacker News

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		TimJRobinson on Nov 23, 2012 \| parent \| context \| favorite \| on: Billion-Ton Comet May Have Missed Earth by a Few H... I'm confused as to why this is coming up now, did they find some new evidence or residual rock from this comet? If not how do they now know that it was actually a comet and not simply a mistake on the astronomers part as they previously thought it was?

lutusp on Nov 23, 2012 [–]

> ... how do they now know that it was actually a comet and not simply a mistake on the astronomers part as they previously thought it was?

They don't. The linked article assumes the veracity of the original account, it doesn't introduce anything new.

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