Krygny writes "NASA's Deep Impact spacecraft (whose wide-reaching mission is called EPOXI) has created a video of the moon transiting Earth as seen from 31 million miles away. Scientists are using the video to develop techniques to study alien worlds. 'Our video shows some express face that are grave for observations of Earth-like planets orbiting other stars,' said Drake Deming of NASA's Goddard Space Flight Center... 'A "sun glint'" can be seen in the movie, caused by light reflected from Earth's oceans, and similar glints to be observed from extrasolar planets could witness alien oceans. Also, we used infrared light instead of the normal red light to make the color unification images, and that makes the land masses much more visible.'" Here are links to the two videos, one red-green-blue and the other infrared-green.blue.

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