Wednesday, March 10, 2010

Chile Earthquake May Have Shortened Earth's Day...

NEW YORK – Earth's days may have gotten a little bit shorter since the massive earthquake in Chile, but don't feel bad if you haven't noticed.The difference would be only about one-millionth of a second.
Richard Gross, a scientist at NASA's Jet Propulsion Laboratory in Pasadena, Calif., and colleagues calculated that Saturday's quake shortened the day by 1.26 microseconds. A microsecond is one-millionth of a second.The length of a day is the time it takes for the planet to complete one rotation — 86,400 seconds or 24 hours...
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