NASA's Chandra and NuSTAR telescopes have teamed up to study a supermassive black hole-powered quasar that could have played a key role in ending the cosmic dark ages.

Strange x-ray pulses hint at a surprisingly long-lived white dwarf orbiting precariously close to a supermassive black hole

Active galactic nuclei are supermassive black holes at the center of certain galaxies. As matter falls into these black holes, enormous amounts of energy are released, making active galactic nuclei, or AGN,

Active galactic nuclei (AGN) are among the most energetic phenomena observed in the universe. These luminous objects, powered by supermassive black holes at the centers of galaxies, release staggering amounts of energy as matter spirals into their intense gravitational pull.

Most picture the night sky as an endless sea of twinkling stars. But if your eyes could see the universe in X-rays, you’d spot thousands upon thousands of bright points representing giant black holes feeding on gas and dust.

Black holes are some of the universe's greatest mysteries, incredibly dense and sometimes massive void that suck in anything and everything that passes their event horizons. Now a relatively nearby star cluster known as Palomar 5,

According to scientists, there could be more black holes in the universe than previously thought. Researchers reckon astronomers could be missing between 30 per cent and 50 per cent of the feeding supermassive black holes,