Astronomers warn that the dim star T Coronae Borealis, 3,000 light years away, may experience a supernova explosion as early as this week. Located in the constellation Northern Crown, T Coronae Borealis is a unique “vampire” double star system where a white dwarf star feeds on a red giant star. The buildup of gases on its surface can lead to a critical temperature and pressure point, triggering a nova that blasts off massive amounts of energy.
To witness this event, observers must face the eastern sky after 10 p.m. and find the Big Dipper, followed by Arcturus. Below and to the left of Arcturus lies Corona Borealis, with T Coronae Borealis at its northern end. The star’s brightness will increase, potentially reaching levels comparable to Polaris, but it will only be visible for a brief moment before fading over several days.
Keep in mind that at this distance, the explosion occurred 3,000 years ago and has taken time to reach Earth. If missed, observers can wait another 80 years for another supernova event from T Coronae Borealis.
Source: https://www.jerseysbest.com/community/jersey-skies-will-the-northern-crown-gain-a-jewel