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EPOXI was a NASA extended mission that repurposed the Deep Impact spacecraft after its primary mission to study extrasolar planets and flyby comets. The mission combined two investigative components: EPOCh, which observed exoplanets, and DIXI, which executed a close flyby of Comet Hartley 2 in 2010....
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Stardust-NExT was a NASA extended planetary mission that repurposed the Stardust spacecraft to conduct a flyby of Comet Tempel 1 in February 2011. The primary objective was to image the artificial impact crater created by the Deep Impact mission's impactor in 2005, which had not been fully observed...
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OSIRIS-APEX is NASA's extended OSIRIS-REx mission, sent after the 2023 Bennu sample return to study asteroid Apophis after its 2029 Earth flyby.
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