utilize the spacecraft. Consequently, Deep Impact flew by Earth on December 31, 2007, on its way to an extended mission, designated EPOXI, with a dual purpose to study extrasolar planets and comet Hartley 2 (103P/Hartley). Communication was unexpectedly lost in August 2013 while the craft was heading for another asteroid flyby.

Scientific goals

The Deep Impact mission was planned to help answer fundamental questions

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