Chandra

A gargantuan explosion tore through the heart of a distant galaxy cluster, releasing about five times more energy than the previous record holder, a new study reports.

Move over, red dwarfs. Emerging research shows that another star type could be more friendly to life.

A cloaked black hole found lurking behind a cloud of gas dates to the early cosmic years of the universe.

It's been 20 years since NASA's Chandra X-Ray Observatory launched to give us the sharpest-ever view of X-rays — and the telescope is still working at the frontier of science, the agency said.

A group of scientists set out to learn whether hot gas in galaxy clusters is as thick as honey sliding off a spoon or as smooth as milk being stirred in a coffee cup.

Astronomers may have spotted a distant star spitting out a giant flare that packed 100,000 times more energy than any seen from Earth's sun, a new study finds.

Astronomers studying black hole SagA* have to deal with the weird, frustrating little star that lit up right between Earth and the black hole in 2013.

The orange speckles in a new image from NASA's Chandra X-ray Observatory add another dimension to the first-ever image of a black hole.

Put yourself at the center of an ever-changing Milky Way with this new immersive video of the galaxy's core.

A powerful quasar has caused a raging storm in a distant cosmic structure known as the "Teacup."