Alkaid (also known as Elkeid, Benetnash or Benetnasch: Bayer designationη Ursae Majoris) is a star in the constellationUrsa Major. Alkaid is 108 light years distant from Earth, possesses an apparent magnitude of +1.9 and belongs to the spectral classification B3. Many of the brighter stars are given names which are known as Bayer designations. ... The Pleiades star cluster A star is any massive gaseous body in outer space just like the Sun. ... Orion is a remarkable constellation, visible from most places on the globe (but not always the whole year long). ... Ursa Major is a constellation visible throughout the year in the northern hemisphere. ... A light year, abbreviated ly, is the distance light travels in one year: roughly 9. ... The apparent magnitude (m) of a star, planet or other heavenly body is a measure of its apparent brightness; that is, the amount of light received from the object. ... In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequenly refined in terms of other characteristics. ...
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