I just went outside here in Florida, where I’m visiting relatives, and yes, Betelgeuse, one of the most familiar stars in the northern night sky (it’s in Orion’s shoulder), is way dimmer than it used to be.

I took this shot with my phone. Betelgeuse used to be about as bright as Rigel, the star at the very bottom of the photo:

This all happened quickly: before October, Betelgeuse was near the top ten brightest stars in the sky. Now it’s lower than 20th. Some speculate that the red giant, 600 light-years away, might go supernova. But the dimming has slowed over the past week. Here’s a good explanation in the New York Times.