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Derived from the Latin stella polaris, pole star. This is the proper Latin name of the brightest star in the constellation Ursa Minor, commonly called the North Star or Pole-Star. The Old English name for it was Scip-steorra ship-star, reflecting its importance in navigation.
Polaris science. The single point of light that we see as Polaris is actually a triple star system, or three stars orbiting a common center of mass. The primary star, Polaris A, is a supergiant with about six times the mass of our sun. A close companion, Polaris Ab, orbits 2 billion miles from Polaris. Much farther away, near the top of the illustration at right, is the third companion Polaris B. Polaris B is located approximately 240 billion miles from Polaris A.