Astronomers observed the fading light of supernova SN 2025kg, which followed the fast X-ray transient (FXT) named EP 250108a.

V Sagittae’s violent mass transfer hints at an imminent nova—and a future supernova visible from Earth. Binary star systems are fairly common in the universe, as are pairs where one star is a compact ...

I was exploding with excitement to ask my friend Guy Worthey about supernovas. He’s an astronomer at Washington State University. He told me a supernova is a very energetic explosion in space. There ...

Astrophotographer David Joyce, based in Kentucky, offers us a spectacular window into the cosmic remains of a giant star that ...

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Why did they form at that time? Astronomers know from observing distant exploding stars that the size of the universe has ...

In November 1572, a brilliant new star appeared in the constellation Cassiopeia, shining so brightly that it was visible ...

When scientists aimed the European Space Agency's X-ray observatory, XMM-Newton, at two mysterious lights on the outskirts of the Large Magellanic Cloud, they discovered an unexpected source: two ...

Yes, this will be liveblogged as soon as it comes out in video. There is nothing wrong with a B-movie that knows it’s a B-movie. More importantly, there could possibly be nothing horrible about a ...

The first double-burst supernova ever observed, SNR 0509, is a historic discovery that reveals how white dwarfs explode in the cosmos.

So much happened in the earliest moments of the universe. Elementary particles appeared, the first nuclei of hydrogen and ...