Betelgeuse is one of the best-known stars in the night sky, as well as the easiest to find. New examinations of this behemoth star suggest it is both smaller — and closer — than astronomers believed.

Astronomers have intensely studied a zombie star lurking in the heart of supernova wreckage. Such a cosmic explosion should have destroyed this undead white dwarf star, but instead, it marked its ...

Back in 2018, a massive cosmic explosion made its way to earth as a bright flash of blue. The flash was quickly nicknamed AT2018cow, or "the Cow". At the time, many believed it could have been a ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Astronomers have ...

The enigmatic and awe-inspiring nature of black holes continues to captivate astronomers worldwide, and the supermassive black hole at the center of Messier 87 (M87) is no exception. M87’s black hole, ...

CNN — Astronomers have spotted the largest cosmic explosion ever witnessed, and it's 10 times brighter than any known exploding star, or supernova. The brightness of the explosion, called AT2021lwx, ...