What's hitting Earth?
Tuesday, March 1, 2011 - 16:30
in Astronomy & Space
Every day about 100 tons of meteoroids -- fragments of dust and gravel and sometimes even big rocks enter the Earth's atmosphere. Stand out under the stars for more than a half an hour on a clear night and you'll likely see a few of the meteors produced by the onslaught. But where does all this stuff come from? Surprisingly, the answer is not well known.