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Alcyone / æ l ˈ s aɪ ə n iː /, [11] designated η Tauri (Eta Tauri, abbreviated Eta Tau, η Tau), is a star in the constellation of Taurus. Approximately 440 light-years from the Sun, it is the brightest star in the Pleiades open cluster, which is a young cluster, around 100 million years old. There are a number of fainter stars very close ...
The brightest stars form a shape somewhat similar to that of Ursa Major and Ursa Minor. The total mass contained in the cluster is estimated to be approximately 800 solar masses and is dominated by fainter and redder stars [clarification needed]. [67] An estimate of the frequency of binary stars in the Pleiades is approximately 57%. [68]
Electra / ə ˈ l ɛ k t r ə /, [11] designated 17 Tauri, is a blue-white giant star in the constellation of Taurus located approximately 400 light years away. It is the third-brightest star in the Pleiades open star cluster (), visible to the naked eye with an apparent magnitude of 3.7.
This is an open cluster of stars known as the Pleiades, or Seven Sisters. Scan this area with binoculars and you can count more than seven stars in the Pleiades.
Pleione [note 1] is a binary star and the seventh-brightest star in the Pleiades star cluster . It has the variable star designation BU Tauri (BU Tau) and the Flamsteed designation 28 Tauri (28 Tau). The star is located approximately 138 parsecs (450 light-years) from the Sun, appearing in the constellation of Taurus.
The first list shows a few of the known stars with an estimated luminosity of 1 million L ☉ or greater, including the stars in open cluster, OB association and H II region. The majority of stars thought to be more than 1 million L ☉ are shown, but the list is incomplete. The second list gives some notable stars for the purpose of comparison.
Annotated night sky image showing Auriga and the Pleiades—Capella is the brightest star, towards top left With an average apparent magnitude of +0.08, Capella is the brightest object in the constellation Auriga , the sixth-brightest star in the night sky, the third-brightest in the northern celestial hemisphere (after Arcturus and Vega ), and ...
The Sun is the brightest star as viewed from Earth, at −26.78 mag. The second brightest is Sirius at −1.46 mag. For comparison, the brightest non-stellar objects in the Solar System have maximum brightnesses of: the Moon −12.7 mag [1] Venus −4.92 mag; Jupiter −2.94 mag; Mars −2.94 mag; Mercury −2.48 mag; Saturn −0.55 mag [2]