Image:Earth-Moon System.jpg

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From 4 million miles away on December 16, 1992, NASA's robot spacecraft Galileo took this picture of the Earth-moon system. Our moon is one of the largest moons in the solar system. It is even larger than the planet Pluto. In this picture, the Earth-moon system actually appears to be a double planet.

The bright, sunlit half of the Earth contrasts strongly with the darker subdued colors of the moon. The terminator (day-night-line) is much less sharp on earth because of athmospheric refraction (twilight).


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