Physics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007eostr..88q.579s&link_type=abstract
Eos, Transactions American Geophysical Union, Volume 88, Issue 52, p. 579-579
Physics
Planetary Sciences: Comets And Small Bodies: Comets: Dust Tails And Trails (6210)
Scientific paper
NASA has given the go-ahead for the Deep Impact spacecraft to fly to comet Hartley 2 after the original target, comet Boethin, could not be found despite extensive searching. The spacecraft, which successfully guided an impactor into comet Tempel 1 in July 2005, will fly by comet Hartley 2 on 11 October 2010 as part of a two-part extended mission known as EPOXI. During the first part of the mission-Extrasolar Planet Observation and Characterization-a large telescope on the spacecraft will observe and study several previously discovered extrasolar planetary systems. During the second part of the mission-the Deep Impact Extended Investigation-the spacecraft will fly to within 1000 kilometers of the 0.8-kilometer-wide comet and study it with two telescopes and an infrared spectrometer. ``Hartley 2 is scientifically just as interesting as comet Boethin because both have relatively small, active nuclei,'' said Michael A'Hearn, principal investigator for EPOXI at the University of Maryland at College Park. Scientists speculate that comet Boethin may have broken up into pieces too small for detection. For more information, visit the Web sites: http://www.nasa.gov/deepimpact and http://www.nasa.gov/epoxi.
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