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New Horizons Crosses Halfway Point To Pluto

It's been nothing less than the fastest ever sprint across the solar system. The half-ton NASA New Horizons probe -- the fastest manmade object ever built -- today crosses the halfway mark on its nearly decade-long odyssey to the dwarf planet Pluto. Today the probe is equidistant between Earth and Pluto; approximately 1.525 billion miles [...]

December 29, 2009
2:31 AM EST