okt 292012
 
Supermassive Black Hole Inflates Giant Bubble

  Using a brand-new radio telescope, astronomers have produced one of the best images ever made at the lowest frequencies of giant bubbles produced by a supermassive black hole. The observations were performed at frequencies ranging from 20 to 160 MHz which are normally used for communications by airplane pilots. The picture shows what looks [continue reading]

okt 222012
 
High-Speed Cosmic Jet of Two Million Lights-Years Long Found

  Blasting over two million lights-years from the center of a distant galaxy is a supersonic jet of material that looks strikingly similar to the afterburner flow of a fighter jet, except in this case the jet engine is a supermassive black hole and the jet material is moving at nearly the speed of light. The jet [continue reading]

okt 152012
 
Traveling Faster Than the Speed of Light

  University of Adelaide applied mathematicians have extended Einstein’s theory of special relativity to work beyond the speed of light. Albert Einstein in 1947. Image Credit: Oren Jack Turner, Princeton, N.J. Einstein’s theory holds that nothing could move faster than the speed of light, but Professor Jim Hill and Dr Barry Cox in the University’s School [continue reading]

sep 182012
 
The Dying Tones of Colliding Black Holes

  Researchers from Cardiff University have discovered a new property of black holes: their dying tones could reveal the cosmic crash that produced them. Black holes are regions of space where gravity is so strong that not even light can escape and so isolated black holes are truly dark objects and don’t emit any form of radiation. [continue reading]

jun 082012
 
How Black Holes Change Gear

  Black holes are extremely powerful and efficient engines that not only swallow up matter, but also return a lot of energy to the Universe in exchange for the mass they eat. When black holes attract mass they also trigger the release of intense X-ray radiation and power strong jets. But not all black holes [continue reading]

mei 232012
 
Colliding Galaxy Cluster Unravelled

  An international team of astronomers has used the International LOFAR Telescope from ASTRON, the Netherlands Institute for Radio Astronomy, to study the formation of the galaxy cluster Abell 2256.  Galaxy cluster Abell 2256 imaged at 60 MHz with LOFAR   Abell 2256 is a cluster containing hundreds of galaxies at a distance of 800 [continue reading]