Russia meteor virtually impossible to see coming

Current and planned efforts focus on larger objects

By Andrew Grant, 18:06 PM February 15, 2013

Scientists have begun piecing together the characteristics of the meteor that exploded over Russia on the morning of February 15, using data from seismic instruments that track earthquakes and microphones designed to detect sonic booms from nuclear explosions. Unlike the asteroid DA14, which narrowly but predictably missed Earth later that day, the meteor was too small to detect before its contrail appeared in the dawn skies over the Russian city of Chelyabinsk.

Yet even an object too small to...

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