A Moon of Mars May Have Once Been Rings (& Might Be Again)

SPACE.COM | on Mon, Mar 20, 4:35 AM

The moons of Mars, Phobos (top) and Deimos, are seen together in this image taken from the Martian surface by NASA's Curiosity rover on Aug. 1, 2013. A new study suggests Mars' largest moon Phobos may undergo a cycle of breaking into rings, then reforming. Credit: NASA/JPL-Caltech/Malin Space Science Systems/Texas A&M Univ. Mars might once have had rings - and might regain them over and over again, according to new research. A new model suggests that Mars' oddball moon Phobos[1] might once ha...

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