Astronomy and Space

Alcor (star)

Alcor () is a binary star system in the constellation of Ursa Major. It is the fainter companion of Mizar, the two stars forming a naked eye double in the handle of the Big Dipper (or Plough) asterism in Ursa Major. The two lie about 83 light-years away from the Sun, as measured by the Hipparcos astrometry satellite.

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See also

• ▸Huygens (spacecraft)
• ▸Coleman Sellers II
• ▸Centaur (rocket stage)

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