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The two tiny Moons of Mars, Phobos and Deimos, are unlike any other astronomical bodies known to us. Too small to be satellites like our Moon - are they asteroids or minor planets? Patrick Moore examines photographs from the Mars probe Mariner 7 and talks about the unique circumstances of these two astronomical dwarfs.
Release date: 1970-07-14
Season number: 14
Episode number: 8
Runtime: minutes