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However, the first dredge-up occurs soon after a star reaches the red supergiant phase and so this only means that Betelgeuse has been a red supergiant for at least a few thousand years. The best prediction is that Betelgeuse has already spent around 40,000 years as a red supergiant, [18] having left the main sequence perhaps one million years ago.
This is a list of supernova candidates, or stars that are believed to soon become supernovae. ... Betelgeuse: 05 h 55 m 10.3 s +07° 24′ 25″ Orion ~400–500 [8 ...
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 ...
To answer your question without getting drawn into a discussion, yes, uncertainties in the lifetime remaining to Betelgeuse make it possible that the time to supernova as observed from Earth is less than its light-time distance, and so the explosion may have "already" happened. — BillC talk 08:21, 28 May 2024 (UTC)
Found in the constellation Orion, Betelgeuse is extremely bright, especially considering that it’s roughly 650 light-years from Earth (though, it does have a radius 1,000 times bigger than the Sun).
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 ...
Models indicate that even rapidly rotating main-sequence stars should be braked by their mass loss so that red supergiants hardly rotate at all. Those red supergiants such as Betelgeuse that do have modest rates of rotation may have acquired it after reaching the red supergiant stage, perhaps through binary interaction. The cores of red ...
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