A young, bright star has been acting a little erratic lately. Betelgeuse's sudden dimming may be a sign that it's about to explode, astronomers say. Another possibility is the red supergiant may just be going through a phase.
The star, Ed Guinan, an astronomy professor at Villanova University, was the lead author on a December 8 paper entitled"The Fainting of the Nearby Supergiant Betelgeuse."He told CNN that Betelgeuse been declining in brightness sharply since October, and was now about 2.5 times fainter than usual. Once the ninth brightest star in the sky, Betelgeuse has fallen now to about the 23rd brightest.
Betelgeuse has been in a normal dimming period over the past few months, but it's just dramatically accelerated compared to past years.The dimming process should end by mid-January, according to mathematical models. But Betelgeuse often follows its own rules, he says."I personally think it's going to bounce back, but it's fun to watch stars change," Guinan said. However, he adds,"If it continues dimming, then all bets are off.
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