A little-known chapter of the Hubble Space Telescope’s history is a reminder of the risks of looking at the sun ...

Active galactic nuclei are supermassive black holes at the center of certain galaxies. As matter falls into these black holes ...

The first black hole that astronomers observed "turning off" just turned back on, releasing jets of hot gas into the cosmos.

In the years following the launch of NASA's Hubble Space Telescope, astronomers have tallied over 1 trillion galaxies in the universe. But only one galaxy stands out as the most important nearby ...

Black holes are some of the universe's greatest mysteries, incredibly dense and sometimes massive void that suck in anything ...

NASA's TESS exoplanet hunter has found the fastest-disintegrating planet ever. Losing a moons-worth of matter every million ...

Amateur astronomers who have purchased telescopes from leading suppliers in the U.S. may be entitled to a payment from a ...

This rare quasar with spiral arms could help astronomers understand how supermassive black holes feed and grow.

Palomar 5 is a unique star cluster that stretches across 30,000 light-years and is located about 80,000 light-years from ...

“He was very taken with the thought that no phenomenon becomes a true phenomena until it has been observed,” Wald told Salon ...

The Andromeda galaxy is a colossal marvel in our sky, hosting over 1 trillion stars. Now, astronomers have used the Hubble ...

These are the planets that will be visible with the naked eye. A rare parade of planets will light up the night sky ...