Source: NASA Discovery Program

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Learn about two missions to study comets—Stardust and Deep Impact—in these videos from NASA. Comets provide an opportunity to investigate the materials that formed the solar system, but it is challenging to research them. The Stardust spacecraft was designed to capture dust particles from comet Wild 2 and deliver them to Earth for analysis. The Deep Impact mission propelled a small spacecraft into comet Tempel 1 while multiple space telescopes observed the event; the data revealed valuable information about the composition and origin of comets.

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Deep Impact (Video)