The Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) on board the Mars Reconnaissance Orbiter has taken high-resolution photographs of Phobos and Deimos, the moons of Mars, recently. The compositions of the moons are now more well-known. The CRISM is operated by the Hopkins Applied Physics Laboratory (APL). The geological structures of the moons have led some scientists to believe that the moons of Mars were asteroids that eventually became caught in Mars' gravity.
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http://media.www.jhunewsletter.com/media/storage/paper932/news/2007/12/06/Science/Apl-Instrument.Images.Twin.Martian.Moons-3137819.shtml
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