Scientists keep watch in case Betelgeuse explodes as a supernova

Why it matters: Being able to observe a nearby supernova would be a rare opportunity that would allow researchers to gather priceless data on an event that only happens two or three times per century in the Milky Way.

• A network of instruments on Earth will be on hand to detect the supernova, which may even be visible in daylight.

How it works: When a star goes supernova, subatomic particles called neutrinos shoot out from its collapsing core before the light from the explosion is visible.

• A network of seven detectors — called SNEWS (pronounced "snooze") — is on the lookout for those neutrinos, acting as an early warning system for supernova.
• Being able to detect these neutrinos allows for hours of lead time before the supernova is visible.

• "[W]e're talking about some of the most intense environments in the universe. You really can't find anything more energetic than these explosions," Indiana University's Justin Vasel told Axios.

But, but, but: There's no guarantee that the star's explosion is imminent. It's possible that Betelgeuse's dimming is a normal part of its stellar cycle and isn't actually a sign of exciting things to come.

Go deeper: Rare supernova is helping scientists unlock some of the inner-workings of the universe