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Deep Impact animation on approach to Tempel 1 This movie is made up of many frames captured by Deep Impact's Medium Resolution Imager between June 22 and June 24, 2004. A brightening by a factor of about 5 and a rapid decay to baseline brightness were observed on June 22. The same outburst was also observed by the Hubble Space Telescope and several ground observatories. NASA / JPL-Caltech / UMD