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

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.

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.

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,

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,

Astronomers have identified a rare cosmic phenomenon: a supermassive black hole, known as J0410−0139, located 12.9 billion light-years from Earth. This black hole, with a mass equivalent to 700 million suns,