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Size comparison between Arcturus, Rigel, S Doradus, Antares, and Betelgeuse Size comparison of Betelgeuse, Mu Cephei, KY Cygni, and V354 Cephei, according to Emily Levesque [117] On 13 December 1920, Betelgeuse became the first star outside the Solar System to have the angular size of its photosphere measured. [ 37 ]
The following well-known stars are listed for the purpose of comparison. Antares (α Scorpii A) 680 [65] AD Fourteenth brightest star in the night sky. [66] Widely recognised as being among the largest known stars. [19] Betelgeuse (α Orionis) 640, [67] 764 +116 −62, [68] 782 ± 55 [69] AD & SEIS Tenth brightest star in the night sky. [66]
Betelgeuse and Saiph lie at a similar distance to Rigel, although Betelgeuse is a runaway star with a complex history and might have originally formed in the main body of the association. [ 40 ] Stellar system
In late 2019 and early 2020, Betelgeuse blew its top. Literally. Around that time the famous bright star marking the right shoulder of Orion suddenly started dimming, dropping to about half its ...
Orange to red stars with complex band spectra, such as Betelgeuse and Antares. This corresponds to the modern class M. Secchi class IV: In 1868, he discovered carbon stars, which he put into a distinct group: [48] Red stars with significant carbon bands and lines, corresponding to modern classes C and S. Secchi class V
Betelgeuse is one of the best-known stars in the night sky, as well as the easiest to find. New examinations of this behemoth star suggest it is both smaller — and closer — than astronomers ...
As Betelgeuse burns through fuel in its core, it has swollen to massive proportions, becoming a red supergiant, the latter phase of giant stars. When the star explodes, the event could be briefly ...
Betelgeuse is an intrinsically variable star. A variable star is a star whose brightness as seen from Earth (its apparent magnitude ) changes systematically with time. This variation may be caused by a change in emitted light or by something partly blocking the light, so variable stars are classified as either: [ 1 ]