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Phobos

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The Moons of Mars Explained -- Phobos & Deimos MM#2

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10 Amazing Facts About Phobos (Moon of Mars)

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Explained: The disintegration of Mars' moon Phobos.

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Is Phobos Doomed?

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Mars' Moon Phobos Eclipses the Sun, as Seen by Curiosity

Phobos is the innermost and larger of the two natural satellites of Mars, the other being Deimos. Both moons were discovered in 1877 by American astronomer Asaph Hall.