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Latest Dark matter Stories

Pulsating White Dwarf Discovered By UT Astronomers
2013-06-20 12:47:40

Lee Rannals for redOrbit.com - Your Universe Online A group of astronomers have discovered pulsations from the crystallized remnant of a burnt-out star. The researchers recently reported in The Astrophysical Journal Letters that they were able to use the 2.1-meter Otto Struve Telescope at the University of Texas McDonald Observatory to take a look at the white dwarf GD 518 and discover the pulsations. This finding will allow scientists to see below the star's atmosphere and into its...

Black Hole X Ray Mystery Solved
2013-06-14 14:00:15

Lee Rannals for redOrbit.com - Your Universe Online Astronomers from several institutions have confirmed theories about how stellar-mass black holes produce their highest-energy light known as hard X-rays. Researchers from NASA, Johns Hopkins University and the Rochester Institute of Technology wrote in the Astrophysical Journal about how they were able to use supercomputer simulations of gas flowing into a back hole to reproduce a range of important X-ray features found in active black...

Project Maps Detailed Motions Of Universe
2013-06-14 11:35:29

Watch the video "Cosmography of the Local Universe" John P. Millis, PhD for redOrbit.com — Your Universe Online Visualizing the Universe is quite difficult. For one, the cosmos is enormous, far beyond the dimensions the human mind can comprehend. However, there is also the technical problem that we usually see images of the Universe as a two-dimensional image or map. Without the benefit of depth, we can´t truly appreciate the scale, orientation, and distribution of matter in...

Data Supports Cold Model Dark Matter
2013-06-13 15:54:45

John P. Millis, PhD for redOrbit.com — Your Universe Online Scientists continue the search to identify the nature of dark matter that seems to pervade the Universe. Since by its very nature it does not interact well — or perhaps at all — with electromagnetic radiation, direct detection of this mysterious form of matter has proven elusive. Despite this obstacle, astronomers have become convinced of its existence because of how it can be ℠seen´ to interact...

Euclid Dark Matter Mission Now In Development
2013-06-11 13:13:58

Lee Rannals for redOrbit.com — Your Universe Online The European Space Agency's (ESA's) Euclid module under development in France will be helping to explore dark energy and dark matter in the universe. Euclid will be launching in 2020 to help scientists better understand the evolution of the Universe since the Big Bang and its present accelerating expansion. Dark matter is invisible to normal telescopes, making it hard to study. However, the elusive subject plays a vital role in...

Dark Matter Not Actually Dark
2013-06-11 09:51:15

John P. Millis, PhD for redOrbit.com — Your Universe Online For more than 80 years physicists and astronomers have been searching for an elusive form of matter that appears to be responsible for most of the mass in the Universe. While the presence of this dark matter can be measured by the gravitational influence of the particles, directly “seeing” the mass has proven troublesome. The working theory for decades has been that the candidate particle should be...

Gravitational Lensing Used To Seek Out Most Distant, Active Star Forming Galaxies
2013-05-29 04:53:02

Lee Rannals for redOrbit.com - Your Universe Online Scientists working with the Atacama Large Millimeter/submillimeter Array (ALMA) have discovered the most distant and active star forming galaxies in our universe. The astronomers wrote in the journal Nature and Astrophysical Journal that they discovered these distant and enigmatic galaxies after surveying large areas of the sky with the 10-meter South Pole Telescope. They used ALMA to help them obtain higher resolution images. The...

Cold Gas May Fuel Galaxy And Star Formation
2013-05-26 05:49:55

redOrbit Staff & Wire Reports - Your Universe Online As galaxies grow over the course of billions of years, they apparently use the cosmic equivalent of bendy straws to feed on cold gas and gain mass, according to new research published in the May 20 edition of the Astrophysical Journal. The study is based on computer simulations conducted by Kyle Stewart, who is currently with California Baptist University in Riverside but completed most of the research while with NASA´s Jet...

Double Star System Detected Using New South African Radio Telescope
2013-05-16 13:22:20

Lee Rannals for redOrbit.com — Your Universe Online Astronomers using the Karoo Array Telescope (KAT-7) in South Africa have revealed giant outbursts from X-ray binary star system Circinus X-1. The team watched as the double star system fired off energetic matter from its core into the surrounding system in extensive, compact jets that flared brightly. Circinus X-1 is a neutron star system where the two stars orbit each other every 16.5 days in an elliptical orbit. When the two...


Latest Dark matter Reference Libraries

Cosmology
2014-01-12 00:00:00

Image Caption: The Hubble Extreme Deep Field (XDF) was completed in September 2012 and shows the farthest galaxies ever photographed by humans. Each speck of light in the photo is an individual galaxy, some of them as old as 13.2 billion years; the observable universe is estimated to contain more than 200 billion galaxies. Credit: NASA/Wikipedia What is Cosmology? I once commented to an acquaintance that I was fascinated by the field of Cosmology, and mused that if I had more time, I...

45_03c916cf051c1a581c0d52b3ccdd7561
2010-09-13 16:56:08

The Coma Cluster (Abell 1656), along with the Leo Cluster, is one of two major clusters compromising the Coma Supercluster. It contains over 1000 identified galaxies. Most of the galaxies in the center of the Coma Cluster are elliptical galaxies including both dwarf and giant. However the center is dominated by NGC 4874 and NGC 4889, two giant elliptical galaxies. The brightest galaxies are visible, a few degrees north of the galactic pole, with an amateur telescope larger than 20 cm. The...

45_ea0b4f3c063ef1aeec4ef6fed79a5d9d
2010-09-07 17:31:13

The Bullet Cluster is made up of two colliding clusters galaxies. According to a 2006 study, the Bullet Cluster also shows the best evidence for the existence of Dark Matter. From observations of galaxy cluster collisions it has been found that many show displacement between their center of visible matter and their gravitational potential. Each component, stars, gas, and dark matter, within a cluster pair behaves differently during a collision allowing for each to be studied separately....

45_274ba7ddcce89663fc213d79e864e44b
2010-09-07 17:03:18

The Abell 520 galaxy cluster is an strange structure formed by a major merger. Due to its odd and chaotic nature it has been given the nick-name the Train Wreck Cluster. The Dark Matter within the cluster does not act as expected like it does in other clusters, therefore, Abell 520 creates problems for many of the prevailing theories about Dark Matter. It also disrupts many alternative theories of modified gravity. Similar to the Bullet Cluster the gas contents and galaxies within the...

67_d2968798d508f86b18fbbe3396553cd4
2010-09-13 16:46:47

The cluster CL0024+17, located in Pisces, is a galaxy cluster that is allowing astronomers to probe the distribution of dark matter in space. Dark matter does not reflect light and therefore cannot be seen. It is only detectable by the way its gravity affects the lights around it. Using gravitational lensing astronomers observe the distorted light around the dark matter and are able to tell where it is located within a cluster. A dark matter ring found near the cluster's center, by...

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Word of the Day
cock-a-hoop
  • Exultant; jubilant; triumphant; on the high horse.
  • Tipsy; slightly intoxicated.
This word may come from the phrase 'to set cock on hoop,' or 'to drink festively.' Its origin otherwise is unclear. A theory, according to the Word Detective, is that it's a 'transliteration of the French phrase 'coq a huppe,' meaning a rooster displaying its crest ('huppe') in a pose of proud defiance.' Therefore, 'cock-a-hoop' would 'liken a drunken man to a boastful and aggressive rooster.'
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