Deep Impact
EPOXI was a compilation of NASA Discovery program missions led by the University of Maryland and principal investigator Michael A'Hearn, with co-operation from the Jet Propulsion Laboratory and Ball Aerospace. "EPOXI" uses the "Deep Impact" spacecraft in a campaign consisting of two missions: the Deep Impact Extended Investigation (DIXI) and Extrasolar Planet Observation and Characterization (EPOCh). "DIXI" aimed to send the "Deep Impact" spacecraft on a flyby of another comet, after its primary mission was completed in July 2005, while "EPOCh" saw the spacecraft's photographic instruments as a space observatory, studying extrasolar planets.