when will betelgeuse go supernova

when will betelgeuse go supernova

1 day ago 8
Nature

Betelgeuse is a red supergiant star expected to go supernova, but current scientific understanding indicates it will not happen anytime soon. Recent discoveries reveal that Betelgeuse has a small companion star, and the star is likely in a stable helium-burning phase. This means it has hundreds of thousands of years before it explodes as a supernova. The star's famous "Great Dimming" event in 2019-2020 was due to a cloud of dust and not an imminent explosion. Betelgeuse’s brightness variations are now understood to be influenced by its companion star, not by a pending supernova. Estimates suggest Betelgeuse will explode anytime within the next 100,000 to a few hundred thousand years, but the exact timing is uncertain. Because Betelgeuse is about 640 light-years away, even if it went supernova "tomorrow," we might not see it for several hundred years. When it does go supernova, it will be an extraordinary event, visible in the sky even during the day and as bright as the full Moon or more for months. However, this event is likely far in the future and not imminent in 2025 or the near term. In summary, Betelgeuse will go supernova in the distant future, most likely thousands to hundreds of thousands of years from now, and not anytime soon within human timescales.

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