NASA’s Chandra Observatory reveals a 25-year time-lapse of Kepler’s Supernova Remnant. Glowing debris expands at different ...

Gamma rays are invisible and ultra-powerful forms of light. They are the most energetic source of radiation known in the ...

For every galaxy that's visible from Earth, there are nine smaller ones that we can't see, even with all the technology we've ...

Astronomers have created a detailed forecast of where they expect to observe future stellar explosions in a nearby galaxy, ...

"This was many times more energetic than any similar event and more than any known explosion powered by the collapse of a ...

It's the last clearly observed supernova in the Milky Way, Gassel said.

If scientists are able to inspect it in person, and they find that Mars was indeed once alive with microbes, we would know ...

Across the sky, astronomers are stitching together vast samples of galaxies to understand how often supermassive black holes ...

Bigger than Hubble and launching as soon as 2029, the Lazuli Space Observatory would be the first-ever full-scale private ...

Scientists have discovered an enormous stream of super-hot gas erupting from a nearby galaxy, driven by a powerful black hole ...

Eric and Wendy Schmidt are backing a start-up-like approach to building a giant space telescope and powerful ground ...

Webb observations of the Sextans A galaxy reveal how stars in a metal-poor areas create cosmic dust, offering clues about the ...