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If Betelgeuse were too close to Earth, the eventual supernova could cause an extinction here on Earth. However, even at 530 light-years distance, our planet will still be safe from the eventual ...
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 ...
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).
To be a threat to Earth, a supernova would need to be no further than 25 light years from the Solar System. Betelgeuse is roughly 600 light years away, and so its supernova would not affect Earth. [140] In December 2011, NASA's Francis Reddy issued a press release debunking the possibility of a supernova occurring in 2012. [141]
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.
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 ...
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)
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 ...