sep 202013
Clues to the Growth of the Colossus in the Coma Cluster

  A team of astronomers has discovered enormous arms of hot gas in the Coma Cluster of galaxies by using NASA’s Chandra X-ray Observatory and ESA’s XMM-Newton. These features, which span at least half a million light years, provide insight into how the Coma cluster has grown through mergers of smaller groups and clusters of [continue reading]

aug 092013
Anne's Image of the Day: Interacting Galaxies IC 1623

August 9, 2013 IC 1623, a pair of interacting galaxies in Cetus Image Credit: NASA, ESA, the Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration, and A. Evans (University of Virginia, Charlottesville/NRAO/Stony Brook University) IC 1623 (also known as Arp 236 or VV 114) is a pair of interacting galaxies located some 250 – 300 million light-years away from [continue reading]

aug 042013
Hubble Finds 'Smoking Gun' After Gamma-Ray Blast

  NASA’s Hubble Space Telescope recently provided the strongest evidence yet that short-duration gamma-ray bursts are produced by the merger of two small, super-dense stellar objects. Compass and Scale Image for GRB 130603B. The galaxy (SDS J112848.22+170418.5) which resides almost 4 billion light-years away, produced the gamma-ray burst. Image Credit: NASA, ESA, and Z. Levay (STScI/AURA) The evidence [continue reading]

mei 232013
Rare Galaxy Merger Gives New Insights of Galaxy Evolution

  A rare encounter between two gas-rich galaxies spotted by ESA’s Herschel space observatory indicates a solution to an outstanding problem: how did massive, passive galaxies form in the early Universe? Several telescopes have teamed up to discover a rare and massive merging of two galaxies that took place when the Universe was just 3 [continue reading]

apr 242013
Anne's Picture of the Day: Elliptical Galaxy NGC 4150

April 24, 2013 NGC 4150, an elliptical galaxy in Coma Berenices Image Credit: NASA, ESA, R.M. Crockett (University of Oxford) S. Kaviraj (Imperial College London and University of Oxford), J. Silk (University of Oxford), M. Mutchler (Space Telescope Science Institute), R. O’Connell (University of Virginia), and the WFC3 Scientific Oversight Committee NGC 4150 is an [continue reading]