
Betelgeuse, with and without dust cloud
We recently posted about the red giant navigational star Betelgeuse in the constellation Orion, which was observed to be growing significantly dimmer. Not a little dimmer but about 40% dimmer. Some astronomers speculated that the dimming suggested that the star may be close to exploding into a supernova as its core collapses. They say that this could happen anytime within the next 100,000 years, or so, a relatively narrow window in astronomical time, if less so from a merely human perspective.
Not long after our post, blog reader Kevin commented that the star had begun to brighten again. (Thanks Kevin for the heads-up.) So what is going on?
As reported by Forbes, a new study suggests that the star is not about to explode, it is just a bit dusty.