WHAT JUST HAPPENED TO BETELGEUSE? Astronomers have identified a new type of stellar explosion: An SME or “Surface Mass Ejection.” Think of it as a CME on steroids; SMEs outmass CMEs by 400 billion to one. An SME on Betelgeuse may be responsible for the red supergiant’s recent dimming. Full story @ Spaceweather.com.
Don’t miss the next CME: Subscribers to our Space Weather Alert Service receive instant text messages when CMEs are about to hit Earth. Above: An artist’s concept of a Surface Mass Ejection (SME) on Betelgeuse.
Space Weather News for Feb. 24, 2020 https://spaceweather.com https://www.spaceweatheralerts.comBETELGEUSE IS BRIGHTENING AGAIN: Call off the supernova watch. Betelgeuse is brightening again. New data from the American Association of Variable Star Observers (AAVSO) shows that the unstable red supergiant is bouncing back from its unprecedented decline. The mystery of Betelgeuse’s behavior is not yet solved, however. Get the full story on Spaceweather.com.
Above: Betelgeuse photographed by Brian Ottum of Animas, New Mexico. [more]
Every few years, Betelgeuse does something to grab the attention of astronomers, then the press gets excited, and everyone worries unnecessarily. I remember back a couple of decades reading that Betelgeuse would be the most likely cause of another mass extinction of life on earth.
The only certainty is that Betelgeuse will blow–but the question is WHEN. Could be today, could be thousands of years from now. It might have already happened, we won’t know until some 640 years (give or take a couple of decades) after the event.
Orion is a winter constellation, and easy to see as it is one of the largest, and the 3 belt stars are quite obvious. —CPL
Astronomers are wondering whether Orion’s shoulder will soon explode
When Betelgeuse does eventually go supernova, the brightness will rival a full moon
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This image is a colour composite made from exposures from the Digitized Sky Survey 2 (DSS2). The field of view is approximately 2.0 x 1.5 degrees. (ESO/Digitized Sky Survey 2. Ackn)
The dramatic dimming of a giant star has astronomers wondering whether it’s getting ready to explode.
Betelgeuse — the red shoulder on the left side in the constellation Orion — has dimmed by a factor of about two since October, a change that has never been documented before.
What makes this development particularly intriguing to astronomers is that the star is slated to explode in spectacular fashion: a supernova. Astronomers estimate this will happen relatively soon — in astronomical terms anyway. It could be today, tomorrow or 100,000 years from now.
And when Betelgeuse goes supernova, astronomers estimate it will be as bright as the full moon and visible even during the day.
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