Comets, not asteroids, scarred Moon's face about 4 billion years
ago.Byline: ANI London, July 28 (ANI): A new study of ancient
rocks in Greenland has suggested that icy comets - not rocky
asteroids This is a list of numbered minor planets, nearly all
of them asteroids, in sequential order. As of late September
2007 there are 164,612 numbered minor planets, and many more not
yet numbered. Most asteroids are ordinary and not particularly
noteworthy. - launched a dramatic assault on the Earth and moon
around 3.85 billion years ago, thus causing the lunar surface to
become scarred. "We can see craters on the moon's surface with
the naked eye, but nobody actually knew what caused them - was
it rocks, was it iron, was it ice?" Uffe Grae Jorgensen, an
astronomer at the Niels Bohr Institute The Niels Bohr Institute
is part of the Niels Bohr Institute for Astronomy, Physics and
Geophysics of the University of Copenhagen. in Copenhagen,
Denmark, told New Scientist. "It's exciting to find signs that
it was actually ice,