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Alpha Orionis, Betelgeuse (s) (proper noun) (no pl)
A red super giant star in the constellation of Orion: Alpha Orionis, is the tenth brightest star in the night sky, although its brightness varies. It is over 10,000 times as luminous as the sun, and lies 650 light-years from earth.

Light takes 60 minutes to travel across the giant star.

This entry is located in the following unit: Astronomy and related astronomical terms (page 2)