Astrophysicist explains science behind once-in-a-lifetime nova outburst that will light up the sky this year

MARCH 19, 2024

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by Cody Mello-Klein, Northeastern University



Credit: Pixabay/CC0 Public Domain

The total solar eclipse isn't the only reason to keep your eyes to the sky this year. For the first time in 80 years, a star system 3,000 light years away will be visible to the naked eye thanks to a once-in-a-lifetime nova outburst.


NASA announced that the nova, which will create a "new" star in the night sky, will light up the night sky some time between now and September and be as bright as the North Star. One of only five recurring novae in our galaxy, it will be visible for a week before it fades back down.

Jonathan Blazek, an assistant professor of physics at Northeastern University, says this is an exciting moment for amateur astronomers and astrophysicists alike. It's not technically a new star, just a star that is now bright enough for people to see more clearly, Blazek says, but it provides an opportunity to see and understand the cosmos in a new way.

What exactly is a nova?
"There's a broad class of these sorts of events, and they typically share the trait of having two objects, or sometimes more than two objects, close to each other, and you're transferring mass from one to the other," Blazek says. "Eventually, you build up enough mass on usually the hotter object that it ignites, in this case undergoing fusion, and then suddenly you get a very rapid release of energy so it gets much, much brighter."

The star system in question is T Coronae Borealis, or T CrB, and it contains a white dwarf and red giant, two stars that create the perfect conditions for a nova outburst.

More:
https://phys.org/news/2024-03-astrophysicist-science-lifetime-nova-outburst.html