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Friedrich Wilhelm August Argelander

Born 22 Mar 1799; died 17 Feb 1875 at age 75.German astronomer who established the study of variable stars as an independent branch of astronomy and is renowned for his great catalog listing the positions and brightness of 324,188 stars of the northern hemisphere above the ninth magnitude. He studied at the University of Königsberg, Prussia, where he was a pupil and later the successor of Friedrich Wilhelm Bessel. In 1837, Argelander published the first major investigation of the Sun's motion through space. In 1844 he began studies of variable stars.

If you are hotter than me

If you are hotter than me does that mean i'm cooler than you?
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