mei 262013
 
Galaxies Grow by Funnels of Cold Gas

  Computer simulations of galaxies growing over billions of years have revealed a likely scenario for how they feed: a cosmic version of swirly straws.  Created with the help of supercomputers, this still from a simulation shows the formation of a massive galaxy during the first 2 billion years of the Universe. Hydrogen gas is [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 182013
 
ALMA Pinpoints Early Galaxies at Record Speed

  A team of astronomers has used the new ALMA (Atacama Large Millimeter/submillimeter Array) telescope to pinpoint the locations of over 100 of the most fertile star-forming galaxies in the early Universe. ALMA is so powerful that, in just a few hours, it captured as many observations of these galaxies as have been made by [continue reading]

apr 042013
 
Green Pea Galaxies May Give Insight in the Early Universe

  The rare Green Pea galaxies discovered by the general public in 2007 could help confirm astronomers’ understanding of reionization, a pivotal stage in the evolution of the early Universe, say University of Michigan researchers. A montage of the six Green Pea galaxies that University of Michigan astronomy researchers studied. Image Credit: Anne Jaskot Reionization [continue reading]

mrt 222013
 
‘Sideline Quasars’ Helped to Stifle Early Galaxy Formation

  University of Colorado Boulder astronomers targeting one of the brightest quasars glowing in the Universe some 11 billion years ago say “sideline quasars” likely teamed up with it to heat abundant helium gas billions of years ago, preventing small galaxy formation. This is an artist’s impression of a distant quasar. The dust is hiding the view [continue reading]

feb 022013
 
Milky Way’s Most Distant Stellar Stream Confirmed

  A stream of at least 150 ancient variable stars has been confirmed to extend some 130,000 light-years beyond our own galaxy’s stellar halo — on the fringes of the Intergalactic Medium, where aside from hot gas and dark matter, space-time becomes as sparse as the deep Sahara. The central disk of our Milky Way [continue reading]