aug 212012
 
The Big Picture of the Universe Confirmed

  We know that stars group together to form galaxies, galaxies clump to make clusters and clusters gather to create structures known as superclusters. At what scale though, if at all, does this Russian doll-like structure stop? Scientists have been debating this very question for decades because clustering on large scales would be in conflict [continue reading]

aug 082012
 
The Largest-Ever 3-D Map of Galaxies and Black Holes

  New 3-D Map of Massive Galaxies and Distant Black Holes Offers Clues to Dark Matter and Dark Energy   The Sloan Digital Sky Survey III (SDSS-III) has released the largest-ever three-dimensional map of massive galaxies and distant black holes, which will help astronomers explain the mysterious “dark matter” and “dark energy” that scientists know [continue reading]

mei 202012
 
SkyMapper May Shed Light on Dark Matter

  Astronomers believe that 90% of our universe is composed of dark matter, a mysterious substance that we can’t directly see. Add to that dark energy, a force that seems to be accelerating the expansion of the universe and the picture you get is of a very strange universe much of which we don’t currently [continue reading]

mei 122012
 
Is a fifth force altering gravity on very large scales?

  Most people take gravity for granted. But for University of Pennsylvania astrophysicist Bhuvnesh Jain, the nature of gravity is the question of a lifetime. As scientists have been able to see farther and deeper into the universe, the laws that govern its expansion have been revealed to be under the influence of an unexplained [continue reading]

mei 082012
 
Supernovae Come From Two Different Systems

  The exploding stars known as Type Ia supernovae serve an important role in measuring the universe, and were used to discover the existence of dark energy. They’re bright enough to see across large distances, and similar enough to act as a “standard candle” – an object of known luminosity. The 2011 Nobel Prize in [continue reading]

apr 112012
 
'Cosmic mirages' confirm accelerated cosmic expansion

An international team of researchers led by Masamune Oguri at Kavli IPMU and Naohisa Inada at Nara National College of Technology conduced an unprecedented survey of gravitationally lensed quasars, and used it to measure the expansion history of the universe. The result provides strong evidence that the expansion of the universe is accelerating. There were [continue reading]