Jet Propulsion Laboratory’s Deep Impact Mission

Deep Impact is a probe that will crash into comet Tempel 1 in 2005. Mission planners expect the resulting crater will be about 90m wide and 30m deep (the comet itself is about 3km, or 1.9 miles around). A spacecraft will be stationed 300 miles away and will “observe the impact, the ejected material blasted from the crater, and the structure and composition of the crater’s interior.” Unlike most space missions, people on the ground should actually be able to see the impact will be visible from Earth, even with fairly small telescopes!

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