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Inside the Ursa Major moving group

Astronomers have found nearly 60 stars that appear to be members of the nearest moving group to Earth.
In 1869, British astronomer Richard Proctor discovered moving groups, saying: "I find that in parts of the heavens the stars exhibit a well-marked tendency to drift in a definite direction," he said. One of Proctor's prime examples consisted of the five central stars of the Big Dipper: Merak, Phecda, Megrez, Alioth, and Mizar.

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