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Latest Dark matter Stories

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2012-07-13 19:24:49

Astronomers have puzzled over why some puny, extremely faint dwarf galaxies spotted in our Milky Way galaxy's back yard contain so few stars. These ghost-like galaxies are thought to be some of the tiniest, oldest, and most pristine galaxies in the universe. They have been discovered over the past decade by astronomers using automated computer techniques to search through the images of the Sloan Digital Sky Survey. But astronomers needed NASA's Hubble Space Telescope to help solve the...

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2012-07-10 13:19:20

Lee Rannals for redOrbit.com - Your Universe Online For the first time, scientists have detected part of the invisible dark matter skeleton of the universe, where over half of all matter is believed to reside. The discovery confirms a key prediction in the theory of how the universe's current web-like structure came to be. The map of the known universe shows that most galaxies are organized into clusters, but some are situated along filaments that connect to the clusters....

Infrared Telescope Finds Impossible Binary Stars
2012-07-05 14:31:31

Lee Rannals for redOrbit.com - Your Universe Online Astronomers have discovered four pairs of stars that orbit each other in less than four hours, according to findings published in the journal Monthly Notices of the Royal Astronomical Society. Using the United Kingdom Infrared Telescope (UKIRT) in Hawaii, astronomers observed something scientists thought couldn't exist. It was always thought that if binary stars form too close to each other, they would end up merging into one...

Milky Way
2012-06-29 04:45:45

Lee Rannals for redOrbit.com - Your Universe Online Astronomers from Canada and the U.S. have found that the Milky Way galaxy may have recently had an encounter with one of its surrounding smaller satellite galaxies. “We have found evidence that our Milky Way had an encounter with a small galaxy or massive dark matter structure perhaps as recently as 100 million years ago,” Larry Widrow, professor at Queen´s University in Canada, said in a press release. “We...

Researching And Reaching Between Stars
2012-06-27 10:24:09

University of Texas astronomers use Lonestar supercomputer to explore role of dark matter in galaxy formation From Earth, observers use telescopes to look and learn about the distant luminous spheres. But the telescope often isn't the only instrument used. Karl Gebhardt, professor of astrophysics at The University of Texas at Austin and one of the principal investigators for the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) project, makes revolutionary discoveries about dark...

Black Holes Could Help Detect Hypothetical Particle
2012-06-19 05:48:11

Lee Rannals for redOrbit.com Scientists have determined that previously undetected particles could be seen as they accumulate around black holes. Vienna University of Technology scientists have discovered a method to prove the existence of hypothetical "axions," which are particles with a very low mass. “The existence of axions is not proven, but it is considered to be quite likely”, Daniel Grumiller, a researcher on the project, said in a press release. Grumiller,...

Growth Found to be Out of Synch For Black Hole
2012-06-12 11:42:59

New evidence from NASA's Chandra X-ray Observatory challenges prevailing ideas about how supermassive black holes grow in the centers of galaxies. Astronomers long have thought that a supermassive black hole and the bulge of stars at the center of its host galaxy grow at the same rate -- the bigger the bulge, the bigger the black hole. A new study of Chandra data has revealed two nearby galaxies whose supermassive black holes are growing faster than the galaxies themselves. The mass of a...

2012-06-11 14:20:06

WASHINGTON, June 11, 2012 /PRNewswire-USNewswire/ -- New evidence from NASA's Chandra X-ray Observatory challenges prevailing ideas about how black holes grow in the centers of galaxies. Astronomers long have thought that a supermassive black hole and the bulge of stars at the center of its host galaxy grow at the same rate -- the bigger the bulge, the bigger the black hole. However, a new study of Chandra data has revealed two nearby galaxies with supermassive black holes that are growing...

CERN Confirms Neutrinos Not Faster Than Light
2012-06-11 06:29:34

Einstein´s Theory Of Relativity Preserved Physicists working at the European Center for Nuclear Research (CERN) in Switzerland on Friday concluded once and for all that neutrinos are definitely not faster than the speed of light, preserving Einstein´s Theory of Special Relativity that was challenged by earlier experiments. The challenge was first made last year when researchers published results of an experiment that seemed to indicate that neutrinos were moving about 3.7...

Wise Finds Fewer Brown Dwarfs Than Expected
2012-06-10 04:49:55

Astronomers are getting to know the neighbors better. Our sun resides within a spiral arm of our Milky Way galaxy about two-thirds of the way out from the center. It lives in a fairly calm, suburb-like area with an average number of stellar residents. Recently, NASA's Wide-field Infrared Survey Explorer, or WISE, has been turning up a new crowd of stars close to home: the coldest of the brown dwarf family of "failed" stars. Now, just as scientists are "meeting and greeting" the new...


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...

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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...

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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....

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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...

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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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