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Chandra Data Helps Solve The Puzzle Of Why Galaxy Clusters

Chandra Data Helps Solve The Puzzle Of Why Galaxy Clusters Contain So Few Stars

Chuck Bednar for redOrbit.com - Your Universe Online New observations of the Perseus and Virgo galaxy clusters made using NASA’s Chandra X-ray Observatory suggest that turbulence may be the reason that hot gas there has been unable to cool,...

Latest Dark matter Stories

2014-10-30 08:29:11

NEW CASTLE, Pa., Oct. 30, 2014 /PRNewswire/ -- Axion Power International, Inc. (Nasdaq: AXPW, AXPWW), a developer of advanced lead-carbon PbC® batteries, energy storage systems and frequency regulation systems, today announced it has been designated as the supplier of energy storage and frequency regulation for a solar farm that, when finished, will be the largest in Pennsylvania. The Coatesville Solar Initiative (CSI) announced its choice of Axion Power and its PbC® technology...

2014-10-27 16:20:29

WASHINGTON, Oct. 27, 2014 /PRNewswire-USNewswire/ -- The same phenomenon that causes a bumpy airplane ride, turbulence, may be the solution to a long-standing mystery about stars' birth, or the absence of it, according to a new study using data from NASA's Chandra X-ray Observatory. http://photos.prnewswire.com/prnvar/20081007/38461LOGO Galaxy clusters are the largest objects in the universe, held together by gravity. These behemoths contain hundreds or thousands of individual galaxies...

dark matter
2014-10-21 04:47:25

April Flowers for redOrbit.com - Your Universe Online For decades, space scientists have been trying to prove, or disprove, the existence of axions — which were first postulated in 1977 by the Peccei–Quinn theory. A new study from the University of Leicester, published in the Monthly Notices of the Royal Astronomical Society, describes the detection of a curious signal in the X-ray sky which may prove the axion particle really exists. The findings also provide tantalizing insight into...

milky way dark matter
2014-10-10 04:30:30

Brett Smith for redOrbit.com - Your Universe Online A team of Australian astrophysicists has determined that the Milky Way has half as much dark matter as previously thought, according to a new study published in the Astrophysical Journal. Dark matter is a mysterious invisible substance that has profound gravitational effect throughout the universe. The researchers found that the amount of dark matter in our galaxy is 800,000,000,000 times the mass of the Sun. To reach their...

Sterile Neutrinos Remain Elusive
2014-10-06 03:49:53

Brookhaven National Laboratory The Daya Bay Collaboration, an international group of scientists studying the subtle transformations of subatomic particles called neutrinos, is publishing its first results on the search for a so-called sterile neutrino, a possible new type of neutrino beyond the three known neutrino "flavors," or types. The existence of this elusive particle, if proven, would have a profound impact on our understanding of the universe, and could impact the design of future...

dark matter AMS
2014-09-19 07:17:18

Chuck Bednar for redOrbit.com – Your Universe Online Thanks to a particle detector module mounted to the exterior of the International Space Station (ISS), researchers from the MIT Laboratory for Nuclear Science and their colleagues have collected new measurements which could help scientists learn more about the origin and characteristics of dark matter. The unit, known as the Alpha Magnetic Spectrometer (AMS), captures incoming cosmic rays from throughout the galaxy. Out of about 41...

distribution of dark matter
2014-09-09 11:12:54

Leighton Kitson, Durham University Scientists believe they have found a way to explain why there are not as many galaxies orbiting the Milky Way as expected. Computer simulations of the formation of our galaxy suggest that there should be many more, smaller galaxies around the Milky Way than are observed through telescopes. This has thrown doubt on the generally accepted theory of cold dark matter, a substance that scientists predict should allow for more galaxy formation around the...

dark matter
2014-09-05 09:05:24

Brendan M. Lynch, University of Kansas Astrophysicists believe that about 80 percent of the substance of our universe is made up of mysterious “dark matter” that can’t be perceived by human senses or scientific instruments. “Dark matter has not yet been detected in a lab. We infer about it from astronomical observations,” said Mikhail Medvedev, professor of physics and astronomy at the University of Kansas, who has just published breakthrough research on dark matter that...

borexino
2014-09-02 04:23:45

Chuck Bednar for redOrbit.com - Your Universe Online Thanks to one of the most sensitive neutrino detectors on Earth, physicists have for the first time confirmed the existence of low-energy neutrinos created by the “keystone” proton-proton (pp) fusion process taking place in the core of the sun, ending a search that has been going on in the scientific community for decades. The pp reaction, the researchers explain, is the first step of a reaction sequence responsible for roughly 99...

black hole growth
2014-08-12 07:56:18

redOrbit Staff & Wire Reports - Your Universe Online Several processes typically limit how quickly black holes can grow, so how did those located at the ends of the universe come to have masses equal to several billion suns? Researchers from the Wiezmann Institute of Science and Yale University have proposed a potential solution in the latest edition of the journal Science. These enormous black holes, the study authors noted in a statement, consume large quantities of interstellar...


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
maffling
  • To stammer.
  • Present participle of maffle, to stammer.
  • A simpleton.
The word 'maffle' may come from a Dutch word meaning 'to move the jaws' or a French word meaning 'having large cheeks'.