Eight years ago, NASA's MESSENGER space capsule made a pass of the Earth on its way to Planet Mercury. As it swept past our planet, it captured a sequence of rearview images, giving us a magnificent sight at what it looks like to leave our world forever. The MESSENGER mission has discovered much about Mercury's chemical configuration, counting indication of organic molecules and water ice. You can read more about the MESSENGER probe and its search of our solar system's smallest planet here.
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