Astronomers pictured novae—the violent explosions that occur on the surface of white dwarf stars—as simple, spherical ...

Decades in the making, NASA's X-ray timelapse shows a stellar explosion expanding into space at up to 2% the speed of light.

Add Yahoo as a preferred source to see more of our stories on Google. This combined image shows Pa 30, a unique stellar remnant in the constellation Cassiopeia. (Credit: NASA/CXC) It's never too late ...

The James Webb Space Telescope has pushed the cosmic frontier back to a time when the universe was still in its infancy, capturing the light of the most ancient supernova ever seen. By catching a ...

For years, astronomers talked about coronal mass ejections on other stars almost like ghost stories. You hear signs, hints and clues, but never the thing itself. Our own Sun throws these storms often.