black holes

Scientists have measured with unprecedented accuracy a black hole that is about 660 million times as massive as our sun, and is encircled by a cloud of gas moving at about 1.1 million miles per hour.

Scientists think that they’ve found the second largest black hole in Milky Way, invisible and with a mass 100,000 times that of the sun. The black hole was observed with the Nobeyama Radio Telescope in Japan.

Scientists have for the first time witnessed a black hole swallow a star and then quickly eject a flare of stellar debris moving at nearly light speed.

Astronomers caught a black hole tearing apart a star in the center of a galaxy about 290 million light years away from Earth.

Neutron stars – the dead stellar remnants of old, burned-out stars – are some of the most extreme objects in the universe.

Stephen Hawking said something! And again the international media is all a'buzz.

New data from a distant galaxy suggests a puzzling stellar phenomenon may not be what astronomers have long believed.

Most black holes have little mass compared to their host galaxy, but a recently discovered black hole grew so quickly the host galaxy couldn’t keep pace.

Radio astronomers are watching a previously dormant black hole wake up in a dramatic display as material falls onto it for the first time in perhaps millions of years.

Quasars emit a light as bright as that of one trillion stars. Scientists think they get their energy from supermassive black holes.

Pulsars are very dense neutron stars that are the size of a city (their radius approaches ten kilometres), which, like lighthouses for the universe, emit gamma radiation beams or X-rays when they rotate up to hundreds of times per second. These characteristics make them ideal for testing the validity of the theory of general relativity, published by Einstein between 1915 and 1916.