posted on Jul, 13 2011 @ 07:10 AM
reply to post by Grimble
Unlikely. But if a larger body came that close to us, the Earth would break up anyway, so losing our atmosphere wouldn't really be much of a
It's thought that Mars lost much of its atmosphere because its core cooled and it lost its magnetic field - this in turn let the solar wind in and it
was this that over hundreds of millions of years removed the atmosphere. Literally blowing it away into space.
Mind, Elenin, like all comets, is a tiny object (in terms of actual size and mass - it's coma may well expand to a huge size, but this is just a thin
nebula of tiny ice and dust particles) and anything of any significant size approaching Earth would be visible in the skies years before it got here