News articles tagged with 'black hole' (Page 2)
Cosmic curiosity reveals ghostly glow of dead quasar
— 4 Nov 2010 13:51 | AstronomyWhile sorting through hundreds of galaxy images as part of the Galaxy Zoo citizen science project two years ago, Dutch schoolteacher and volunteer astronomer Hanny van Arkel stumbled…
Extreme X-ray source supports new class of black hole
— 9 Sep 2010 10:30 | AstronomyA group of international astronomers in the UK, France and the USA, led by the University of Leicester, have found proof to confirm the distance and brightness of the most extreme ultra-luminous…
When galaxies collide: How the first super-massive black holes were born
— 26 Aug 2010 08:07 | AstronomyAstronomers believe they have discovered the origin of our universe's first super-massive black holes, which formed some 13 billion years ago…
How much mass makes a black hole?
— 18 Aug 2010 17:12 | AstronomyTo reach their conclusions, the astronomers looked in detail at the extraordinary star cluster Westerlund 1, located 16 000 light-years away in the southern constellation of Ara (the…
Black hole jerked around twice
— 22 Jul 2010 10:20 | AstronomyScientists have found evidence that a giant black hole has been jerked around twice, causing its spin axis to point in a different direction from before. This discovery, made with new…
Rain of giant gas clouds create active galactic nuclei
— 9 Jul 2010 09:04 | AstronomyGalaxies like our own were built billions of years ago from a deluge of giant clouds of gas, some of which continue to rain down. Now new calculations tie the rain of giant clouds of…
Black hole blows big bubble
— 8 Jul 2010 08:15 | AstronomyCombining observations made with ESO's Very Large Telescope and NASA's Chandra X-ray telescope, astronomers have uncovered the most powerful pair of jets ever seen from a stellar black…
RXTE homes in on a black hole's jets
— 2 Jul 2010 10:47 | AstronomyFor decades, X-ray astronomers have studied the complex behaviour of binary systems pairing a normal star with a black hole. In these systems, gas from the normal star streams toward…
Backwards black holes might make bigger jets
— 2 Jun 2010 14:57 | AstronomyGoing against the grain may turn out to be a powerful move for black holes. New research suggests supermassive black holes that spin backwards might produce more ferocious jets of gas.…
NASA's Swift Survey finds 'smoking gun' of black hole activation
— 27 May 2010 11:38 | AstronomyData from an ongoing survey by NASA's Swift satellite have helped astronomers solve a decades-long mystery about why a small percentage of black holes emit vast amounts of energy…