News tagged with dark halo
Scientists release most accurate simulation of the universe to date
(PhysOrg.com) -- The Bolshoi supercomputer simulation, the most accurate and detailed large cosmological simulation run to date, gives physicists and astronomers a powerful new tool for understanding such ...
Sep 29, 2011 |
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Globular clusters on a plane
Globular clusters are generally some of the oldest structures in our galaxy. Many of the most famous ones formed around the same time as our galaxy, some 13 billion years ago. However, some are distinctly ...
Sep 23, 2011 |
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Dark matter may be an illusion caused by the quantum vacuum
(PhysOrg.com) -- One of the biggest unsolved problems in astrophysics is that galaxies and galaxy clusters rotate faster than expected, given the amount of existing baryonic (normal) matter. The fast orbits ...
Aug 11, 2011 |
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Astronomers peer into the dark
(PhysOrg.com) -- Astronomers from the Scottish Universities Physics Alliance (SUPA) have produced a completely new catalogue of ~15,000 groups of galaxies that gives a new insight into dark matter, the material ...
Apr 21, 2011 |
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Halos Gone MAD
One of the successes of the ΛCDM model of the universe is the ability for models to create structures of with scales and distributions similar to those we view in the universe today. Or, at least that’s ...
Apr 08, 2011 |
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Missing Milky Way dark matter
Although dark matter is inherently difficult to observe, an understanding of its properties (even if not its nature) allows astronomers to predict where its effects should be felt. The current understanding ...
Nov 09, 2010 |
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Cluster collisions switch on radio halos
(PhysOrg.com) -- This is a composite image of the northern part of the galaxy cluster Abell 1758, located about 3.2 billion light years from Earth, showing the effects of a collision between two smaller galaxy ...
Aug 30, 2010 |
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Dark matter is held together by 'attractors'
The universe consists of a large amount of invisible matter - dark matter. We do not know what it is, but we know that it is there and that without dark matter there would be no galaxies, and hence stars, ...
Aug 10, 2010 |
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Image: Apollo 16: Footsteps Under High Sun
(PhysOrg.com) -- The lunar module Orion landed in the Descartes Highlands of the moon on April 21, 1972. The Apollo 16 mission targeted a highland region. Originally thought to be a volcanic site, the samples ...
Space & Earth / Space Exploration
Jul 08, 2010 |
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Dark Matter in a Galaxy
(PhysOrg.com) -- Stars, the most familiar objects in the night sky, make up only a tiny percentage of the total amount of matter in the universe -- about 2%.
Oct 30, 2009 |
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Invisible hand in invisible matter
(PhysOrg.com) -- An international team of astronomers have found an unexpected link between mysterious 'dark matter' and the visible stars and gas in galaxies that could revolutionise our current understanding ...
Oct 06, 2009 |
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Dark Matter May be Easier to Detect than Previously Thought
(PhysOrg.com) -- The Milky Way, like many other galaxies, is thought to be embedded in massive, lumpy amounts of dark matter that release gamma rays and other emissions. Although at first these emissions seem ...
Aug 10, 2009 |
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Computer Finds Massive Black Hole in Nearby Galaxy
Astronomers Karl Gebhardt of The University of Texas at Austin and Jens Thomas of the Max Planck Institute for Extraterrestrial Physics have used new computer modeling techniques to discover that the black ...
Jun 09, 2009 |
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Did 'Dark Gulping' Generate Black Holes in Early Universe?
(PhysOrg.com) -- A process called ‘dark gulping’ may solve the mystery of the how supermassive black holes were able to form when the Universe was less than a billion years old.
Apr 23, 2009 |
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New Limits on the Origin of Dark Matter
(PhysOrg.com) -- Determining the identity of dark matter, the mysterious stuff thought to make up the vast majority of matter in the universe, is one of the most fundamental challenges facing modern physics. Through theory ...
Jan 27, 2009 |
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