Mars to be most visible on Christmas Eve
NASA's Hubble Space Telescope took this close-up of the red planet Mars when it was just 55 million miles (88 million kilometers) away on December 17, 2007. Mars will be at its brightest on December 24, 2007 as it aligns directly opposite of the sun, and will not be as visible for another nine years. This color image was assembled from a series of exposures taken within 36 hours of the Mars closest approach with Hubble's Wide Field and Planetary Camera 2. (UPI Photo/NASA/ESA/Hubble Heritage Team)
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