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How so?
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Any object that orbits a celestial body in a circular orbit is a moon. Mars has a few moons that are asteroids "only" 15 miles across. Technically, if we include man made object, satellites are moons. The only reason there's "one" moon is because we all refer to Luna as Moon. If memory serves, Titan and Europa are the two largest of Saturn's moons... Out of 72.
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Edited by Xx Post It xX: 2/12/2015 3:53:56 PMSo asteroids are moons? All bodies in the heavens have circular orbits? Titan and Europa are planets.
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*sigh*
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Nah, the objects in orbit are referred to as satellites. There are, of course, the man made ones, but I'm pretty sure only natural satellites are "moons."