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Arcturus is the brightest star in the northern constellation of Boötes. With an apparent visual magnitude of −0.05, [2] it is the fourth-brightest star in the night sky, and the brightest in the northern celestial hemisphere.
11 Φεβ 2022 · Arcturus is a red giant star in the Northern Hemisphere of Earth 's sky and the brightest star in the constellation Boötes (the herdsman). Arcturus is also among the brightest stars that...
Arcturus, also known as Alpha Boötis, is one of the brightest stars in the northern hemisphere. In fact, it is the third brightest individual star in the entire night sky behind Sirius and Canopus.
9 Ιουν 2023 · Arcturus is a giant star of the spectral type K1.5IIIFe-0.5. It is the brightest class K giant in the sky, outshining Aldebaran (mag. 0.86) in the constellation Taurus and Pollux (mag. 1.14) in Gemini. It has an absolute magnitude of about -0.30.
31 Αυγ 2014 · Arcturus, Alpha Boötis, is the brightest star in Boötes constellation and the fourth brightest star in the sky. With an apparent magnitude of -0.04, Arcturus is the brightest star in the northern celestial hemisphere.
20 Ιαν 2020 · Arcturus is symbolically part of the Behenian stars, and physically part of the Arcturus Stream – a collection of 52 stars that may be the remnants of a dwarf galaxy. Formation Analysis suggests that Arcturus formed in the outer reaches of the Milky Way’s galactic halo around 7.1 billion years ago.
Arcturus lies 36.7 light years from Earth – over 209 trillion miles but near cosmic standards. It resides among the 10 closest stars, with only Alpha Centauri lying closer in our region of the galaxy.
