Pluto's Moons Offer Hints of Alien Worlds
by Ken Croswell
Planet or not, Pluto and its newest moons may tell us a lot about how other worlds orbit distant stars. A new computer simulation based on the motions of Pluto's satellites not only zeroes in on the masses of two of the moons but predicts that planets orbiting double stars are more widely spaced from one another than are the worlds of single stars such as the Sun.
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