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Achernar |
Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson | 0.07 sec. |
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Achernar (ā`kərnär'), brightest star in the constellation Eridanus Eridanus (ĭrĭd`ənəs), large southern constellation stretching SW from Orion for about 60°. ..... Click the link for more information. ; Bayer designation α Eridani; 1992 position R.A. 1h37.4m, Dec. −57°16'. A bluish-white white star with apparent magnitude magnitude, in astronomy, measure of the brightness of a star or other celestial object. The stars cataloged by Ptolemy (2d cent. A.D.), all visible with the unaided eye, were ranked on a brightness scale such that the brightest stars were of 1st magnitude and the ..... Click the link for more information. 0.51, it is one of the 10 brightest stars in the entire sky. Its distance is about 120 light-years, and its luminosity about 600 times that of the sun. Achernar is of spectral class spectral class, in astronomy, a classification of the stars by their spectrum and luminosity . In 1885, E. C. Pickering began the first extensive attempt to classify the stars spectroscopically. ..... Click the link for more information. B5 V. Its name is from the Arabic meaning "end of the river [Eridanus]." How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Although astronomers already knew that Achernar spins at
least 225 kilometers per second, they were flat-out astonished by their
newest observations. |
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