Other Free Encyclopedias » 21st Century Webster's Family Encyclopedia » 21st Century Webster's Family Encyclopedia - Arcturus to Augur

Arcturus

earth

Arcturus (Alpha Bootes), brightest and fourth -largest star, orange-red in color. It is located in the constellation Boötes. Arcturus is about 40 light-years from earth and is moving toward earth at 3 mi (5 km) per second. Its luminosity is about 100 times that of the sun.

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