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Betelgeuse as seen by ALMA. Photo: ESO/NAOJ/NRAO/E. O’Gorman/P. Kervella

Astronomers are speculating that one of the most famous stars in the night sky could explode as a supernova in the not-too-distant future.

Driving the news: Scientists have been watching as Betelgeuse, which is located in the constellation Orion, has dimmed more than expected, potentially signaling that it's about to explode.

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

Go deeper

Updated 2 mins ago - Politics & Policy

Omicron dashboard

Illustration: Aïda Amer/Axios

  1. Health: Omicron fuels the case for COVID boosters — Omicron variant lifts Moderna's stock price — CDC strengthens COVID booster recommendation.
  2. Politics: Biden says fight against Omicron won't include "shutdowns or lockdowns."
  3. States: Federal court blocks Biden's vaccine mandate for health workers in 10 states — NYC urges masks indoors "at all times" regardless of vaccination status — New York declares state of emergency amid concerns over Omicron.
  4. World: Omicron adds urgency to vaccinating worldWHO warns against travel bans on southern African countries — First North American Omicron cases identified in Canada.
  5. Variant tracker: Where different strains are spreading.
Kendall Baker, author of Sports
Updated 10 mins ago - Sports

College football gone mad

Former Notre Dame coach Brian Kelly walks in front of his players. Photo: David Madison/Getty Images

In the span of two days, the head coaches of two of the biggest college football programs in America have jumped ship, wooed by even greater challenges — and the almighty dollar.

Driving the news: Lincoln Riley is ditching Oklahoma for USC in a deal reportedly worth $110 million. LSU poached Brian Kelly from Notre Dame with a reported 10-year, $100 million contract.

Media startups anxiously await BuzzFeed’s stock market debut

Illustration: Sarah Grillo/Axios

Digital media companies considering going public are watching BuzzFeed's expected stock market debut next week to see how investors will respond.

Why it matters: A slowdown in SPACs (special purpose acquisition companies) earlier this year pushed some digital media companies that were considering going public via SPAC IPOs away from the idea, such as Vice.