Sunday, June 27, 2010
Spacecraft to Make Final Flyby of Earth
The re-purposed href="http://www.universetoday.com/guide-to-space/comets/deep-impact/" class="alinks_links" title="" rel="external">Deep Impact spacecraft will make one final href="http://www.universetoday.com/guide-to-space/spaceflight/flyby/" class="alinks_links" title="" rel="external">flyby of href="http://www.universetoday.com/guide-to-space/earth/" class="alinks_links" title="" rel="external">Earth on Sunday June 27, 2010, getting a gravity assist to help propel the spacecraft towards a meetup with href="http://www.universetoday.com/guide-to-space/comets/" class="alinks_links" title="" rel="external">comet Hartley 2 this fall. The spacecraft bus that brought the Deep Impact "impactor" to comet Tempel 1 in July of 2005 has been put back to work double time where two new missions share the same spacecraft. This is the fifth time this spacecraft has flown by Earth, and at the time of closest approach on Sunday, it will be about 30,400 kilometers (18,900 miles) above the South Atlantic.
"The speed and orbital track of the spacecraft can be changed by changing aspects of its flyby of Earth, such as how close it comes to the href="http://www.universetoday.com/guide-to-space/the-solar-system/planet/" class="alinks_links" title="" rel="external">planet," said University of Maryland astronomer Michael A'Hearn, principal investigator for both the new EPOXI mission and its predecessor mission, Deep Impact.
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