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

Supernova, A supergiant that collapses onto itself and explodes with such force that it releases more energy than millions of suns. (Photo by: QAI Publishing/Universal Images Group via Getty Images) ...

We all know the supernova, right? It's one of the most powerful explosions in the known universe, a source of light so bright that it can - for a few weeks at least - outshine an entire galaxy of ...

This week’s image from the Hubble Space Telescope shows the aftermath of an epic explosion in space caused by the death of a massive star. Some of the most dramatic events in the cosmos are supernovas ...

An artist’s interpretation of the calcium-rich supernova 2019ehk. Shown in orange is the calcium-rich material created in the explosion. Purple coloring represents gas shed by the star before the ...

TOKYO — When a supernova was seen glittering in the night sky for six months in 1181, it was so bright that Chinese and Japanese astronomers recorded it as a "guest star" in the Cassiopeia ...

When a supernova was seen glittering in the night sky for six months in 1181, it was so bright that Chinese and Japanese astronomers recorded it as a “guest star” in the Cassiopeia constellation. Now, ...