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A clear separation between dark and ordinary matter during a clash 5.7 billion light years from Earth

Dark matter: Physicists may have found piece of the puzzle

Physics / General Physics

created Apr 01, 2009 | popularity 3.9 / 5 (26) | comments 29

European astronomers said on Wednesday that an anomalous energy signal detected by an orbiting satellite could be a telltale of the enigmatic substance known as dark matter.


PAMELA

Has PAMELA Already Seen Dark Matter?

Physics / General Physics

created Aug 25, 2009 | popularity 3.7 / 5 (15) | comments 7 weblog

(PhysOrg.com) -- Back in 2006, PAMELA (a Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics) was launched with the purpose of detecting cosmic radiation and looking for clues pointing ...


Voiding the Cosmic Void: We're not at Center of the Universe After All

Physics / General Physics

created Dec 10, 2008 | popularity 3.8 / 5 (48) | comments 25

Models of the universe that place us near the center of a large, sparse region don't jibe with astronomical observations. Cosmologists at the University of British Columbia reached the conclusion through a new analysis that ...


A Theory of Dark Matter

A Theory of Dark Matter

Physics / General Physics

created Sep 08, 2009 | popularity 3.6 / 5 (41) | comments 58

Among the most astounding, unexpected, and important achievements of the past century (or even more) have been the discoveries of dark matter and dark energy, collectively dubbed the "dark sector."


Do we need dark matter?

Do we need dark matter?

Physics / General Physics

created Nov 12, 2009 | popularity 4.2 / 5 (21) | comments 34

It's the biggest problem in physics: the matter we can see in the universe accounts for just five per cent of the observed gravity that holds galaxies together.


Can R2 gravity explain dark matter?

Physics / General Physics

created Apr 20, 2009 | popularity 3.4 / 5 (70) | comments 50 feature

(PhysOrg.com) -- "In many ways, the standard model of cosmology works very well," Jose Cembranos tells PhysOrg. "However, there are very basic features that we just do not know. We have dark energy and dark matter. They d ...


Astronomers Gravitate Toward Einstein's Telescope

Astronomers Gravitate Toward Einstein's Telescope

Space & Earth / Astronomy

created Feb 20, 2009 | popularity 3.4 / 5 (14) | comments 7

Scientists are harnessing the cosmos as a scientific 'instrument' in their quest to determine the makeup of the universe.


Dark energy found stifling growth in universe

Dark Energy Found Stifling Growth in Universe

Physics / General Physics

created Dec 16, 2008 | popularity 4.3 / 5 (40) | comments 26

(PhysOrg.com) -- For the first time, astronomers have clearly seen the effects of "dark energy" on the most massive collapsed objects in the universe using NASA's Chandra X-ray Observatory. By tracking how ...


Astronomers Detect Cosmic 'Dark Energy' in Galaxies Nearest Earth

Astronomers Detect Cosmic 'Dark Energy' in Galaxies Nearest Earth

Space & Earth / Astronomy

created Jan 06, 2010 | popularity 4.9 / 5 (21) | comments 4 | with audio podcast

(PhysOrg.com) -- An international team of astronomers, including a University of Alabama researcher, have detected effects of "dark energy" within the Local Group of galaxies containing our own Milky Way Galaxy.


New Data Suggests We Don’t Live in a Void, and Supports Dark Energy

New Data Suggests We Don’t Live in a Void, and Supports Dark Energy

Physics / General Physics

created Jan 28, 2009 | popularity 3.9 / 5 (36) | comments 75 feature

(PhysOrg.com) -- An alternative proposal to dark energy in which the Earth sits near the center of a large void is undergoing scrutiny, and the results show that void models fit poorly with observed data. ...


Aussie galaxy survey to lead to 'new physics'

Aussie galaxy survey to lead to 'new physics'

Space & Earth / Astronomy

created Dec 08, 2009 | popularity 4.7 / 5 (23) | comments 7

(PhysOrg.com) -- Australian astronomers have released the first set of data from the first project to look at the effects of "dark energy" halfway back in the Universe's lifetime.


Team Shines Cosmic Light on Missing Ordinary Matter

Space & Earth / Astronomy

created Jan 07, 2010 | popularity 4.4 / 5 (17) | comments 11 | with audio podcast

(PhysOrg.com) -- An international team of scientists, led by University of Maryland astronomer Stacy McGaugh, has found that individual galactic objects have less ordinary matter, relative to dark matter, than does the Universe ...


Better Supernovae Measurements Aim To Improve Understanding of Dark Energy

Better Supernovae Measurements Aim To Improve Understanding of Dark Energy

Space & Earth / Astronomy

created May 22, 2009 | popularity 4.6 / 5 (9) | comments 8

(PhysOrg.com) -- A new technique for measuring the distances to supernovae more accurately than ever before has been developed by a team of scientists from Yale University, Lawrence Berkeley National Laboratory ...


Invisible hand in invisible matter

Invisible hand in invisible matter

Space & Earth / Astronomy

created Oct 06, 2009 | popularity 4.6 / 5 (50) | comments 38

(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 ...


High-precision measurements confirm cosmologists' standard view of the universe

Precise picture of early Universe supports 'dark matter' theory

Space & Earth / Astronomy

created Nov 02, 2009 | popularity 4.8 / 5 (17) | comments 9

A detailed picture of the seeds of structures in the universe has been unveiled by an international team co-led by a Cardiff University scientist.