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These names of stars that have either been approved by the International Astronomical Union or which have been in somewhat recent use. IAU approval comes mostly from its Working Group on Star Names, which has been publishing a "List of IAU-approved Star Names" since 2016. As of April 2022, the list included a total of 451 proper names of stars. [1]
In this list, a star is identified by a lower-case letter of the Greek alphabet, followed by the Latin name of its parent constellation. The Bayer designation uses the possessive form of a constellation's name, which in almost every case ends in is, i or ae; um if the constellation's name is plural (see genitive case for constellations). In ...
The following is a list of particularly notable actual or hypothetical stars that have their own articles in Wikipedia, but are not included in the lists above. BPM 37093 — a diamond star Cygnus X-1 — X-ray source
Camelopardalis is a large but faint constellation of the northern sky representing a giraffe.The constellation was introduced in 1612 or 1613 by Petrus Plancius. [3] [1] Some older astronomy books give Camelopardalus or Camelopardus as alternative forms of the name, but the version recognized by the International Astronomical Union matches the genitive form, seen suffixed to most of its key stars.
Most northern constellations date to antiquity, with names based mostly on Classical Greek legends. [11] Evidence of these constellations has survived in the form of star charts, whose oldest representation appears on the statue known as the Farnese Atlas, based perhaps on the star catalogue of the Greek astronomer Hipparchus. [43]
A 15 M ☉ star would take between 11.5 and 15 million years to reach the red supergiant stage, with more rapidly-rotating stars taking the longest. [174] Rapidly-rotating 20 M ☉ stars take 9.3 million years to reach the red supergiant stage, while 20 M ☉ stars with slow rotation take only 8.1 million years. [ 173 ]
It approved the name Achird for the component Eta Cassiopeiae A on 5 September 2017 and it is now so included in the List of IAU-approved Star Names. [ 15 ] In Chinese astronomy , Eta Cassiopeiae is within the Legs mansion , and is part of the 王良 ( Wáng Liáng ) asterism named for a famous charioteer during the Spring and Autumn period .
It is generally the eleventh brightest star in the night sky, but this has varied between being the tenth brightest to the 23rd brightest by the end of 2019. [8] [9] The end of its life is expected to result in a supernova explosion that will be highly visible from Earth, possibly outshining the Earth's moon and being visible during the day ...