A small asteroid whizzed past Earth within the orbit of the Moon early Saturday. In astronomical terms, that's a close shave. However, such close shaves are fairly regular occurences with small bodies.
This particular asteroid is only about 30 feet across and wasn't discovered until Thursday. Had it hit a major city, it could have caused a major disaster, but otherwise any problem caused probably would have been local in nature. There is no defense against such an object discovered so late. Any such defense would require a vast, robust space infrastructure-- a civilization perfectly at home beyond Earth.
Sunday, October 18, 2009
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