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,

A mysterious black hole has started behaving even more strangely, scientists have said. The supermassive black hole has been sending out flashes that have increased in speed. The black hole is known as 1ES 1927+654,

Regular pulses of X-ray radiation emanating from a supermassive black hole could be explained by a white dwarf star on the verge of falling in

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,

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,