加载中…一颗小行星已于星期五飞过地球
(2013-02-16 15:16:31)
标签：
小行星地球飞越星期五杂谈 |
分类： 科学环保发明 |
http://www.lbnelert.com/wp-content/uploads/2013/02/astroid.jpgASTEROID TO FLY
PAST EARTH FRIDAY : If
asteroids were apartments, this one would be New York City–style
teensy. NASA is on the lookout for a 150-foot asteroid, described
as roughly the size of an apartment building, slated to fly
dangerously close to Earth sometime Friday. DA14’s journey will
actually be the closest to Earth for a space rock its size—missing
our planet by only 17,150 miles. While the little guy is too small
to see with the naked eye, it could release the equivalent of 2.4
million tons of TNT and destroy about 750 square miles if it were
to touch ground. But scientists are sure that won’t happen and are
excited for this opportunity to learn more about how to keep
future—potentially harmful—asteroids away.
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