On January 12, 2005, NASA launched its Deep Impact mission to crash into comet Tempel 1, also known as 9P/Tempel. Two ...

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Commissioned in November of 1999 as the eighth mission in NASA's low-cost, high-frequency Discovery program of planetary ...

Embed <iframe src="https://www.npr.org/player/embed/4735606/4735607" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player"> NASA ...