EPOXI is an innovative mission that re-purposed the Deep Impact spacecraft to conduct two additional exciting science investigations. By re-directing the Deep Impact spacecraft, which was already in orbit around the Sun, EPOXI ‘s new assignment was to search for planets around other stars and observe another comet. EPOXI is funded by NASA as a Discovery Mission of Opportunity.

EPOXI is a combination of the names for the two components of the new mission: Extrasolar Planet Observations and Characterization (EPOCh) and Deep Impact eXtended Investigation (DIXI), a flyby of comet Hartley 2.