Size comparison : Sun, Sirius and Rigel

by: M.Carroll/Novapix
Reference: a-eto99-00000
Date: 2008-12-07

The brightest star in Earth's sky, Sirius, is seen here next to our Sun and the blue giant Rigel. Sirius has a small companion star, Sirius B. Rigel forms the left foot in the constellation Orion, and its light is equal to 40,000 suns.

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