Capella (Star)
(Sprache: Englisch)
Capella is the brightest star in the constellation Auriga, the sixth brightest star in the night sky and the third brightest star in the northern celestial hemisphere, after Arcturus and Vega. Although it appears to be a single star to the naked eye, it is...
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Capella is the brightest star in the constellation Auriga, the sixth brightest star in the night sky and the third brightest star in the northern celestial hemisphere, after Arcturus and Vega. Although it appears to be a single star to the naked eye, it is actually a star system of four stars in two binary pairs. The first pair consists of two bright, large type-G giant stars, both with a radius around 10 times the Sun's, in close orbit around each other. These two stars are thought to be cooling and expanding on their way to becoming red giants. The second pair, around 10,000 astronomical units from the first, consists of two faint, small and relatively cool red dwarfs. The Capella system is relatively close, at only 42.2 light-years (12.9 pc) from Earth.
Bibliographische Angaben
- 2009, 168 Seiten, Kartoniert (TB), Englisch
- Herausgeber: McBrewster, John, Miller, Frederic P., Vandome, Agnes F.
- Verlag: Alphascript Publishing
- ISBN-10: 6130263694
- ISBN-13: 9786130263690
Sprache:
Englisch
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