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Latest Dark matter Stories

How Big Can Black Holes Get?
2012-12-19 07:56:28

Lee Rannals for redOrbit.com - Your Universe Online According to a study using data from NASA's Chandra X-ray Observatory, there may be more ultramassive black holes in the Universe than previously thought. A new analysis has looked at the brightest galaxies in a sample of 18 galaxy clusters in order to target the largest black holes. The scientists' work suggests that at least ten of the galaxies contain an ultramassive black hole, weighing between 10 and 40 billion times the mass...

Astronomers Observe White Dwarfs Imitating Black Holes
2012-12-18 14:20:20

Lee Rannals for redOrbit.com — Your Universe Online University of Southampton researchers reported in The Astrophysical Journal that they have observed bright X-ray flares in a nearby galaxy being produced by a white dwarf. The team made the discovery by detecting a dramatic, short-lived X-ray flare that was picked up by an X-ray telescope on the International Space Station (ISS). Astronomers used optical telescopes in South Africa and Chile to help observe the flare, called...

First Stars Born Short 750 Million Years After The Big Bang
2012-12-06 12:30:42

April Flowers for redOrbit.com - Your Universe Online The universe has had traces of heavy elements such as carbon and oxygen as far back in time as astronomers have been able to see. Elements such as these were originally churned from the explosion of massive stars. They formed the building blocks for planetary bodies, and eventually for life on Earth. Peering back far in time, a research team from MIT, Caltech, and the University of California at San Diego (UCSD) found matter...

Brown Dwarf Stars Can Grow Rocky Planets
2012-11-30 06:05:22

Lee Rannals for redOrbit.com - Your Universe Online - Video 1 | Video 2 | Video 3 Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) have discovered that the outer region of a dusty disc encircling a brown dwarf contains solid grains like those found in denser discs of newborn stars. The find challenges theories of how rock, Earth-scale planets form, suggesting the planets may be more common in the Universe than expected. Scientists believe rocky planets form...

Hubble Sets Dark Matter Record Straight
2012-11-29 19:24:08

Lee Rannals for redOrbit.com — Your Universe Online A new observation of Abell 520 using the Hubble Space Telescope has helped astronomers determine that the core of the galaxy cluster is not over-dense in dark matter after all. Astronomers earlier this year spotted an overabundance of dark matter in the heart of the galaxy cluster. This observation was puzzling because dark matter and galaxies should be anchored together. Scientists have evidence that dark matter is...

Galaxy Clusters Offer Insight On Dark Matter
2012-11-21 09:56:07

April Flowers for redOrbit.com - Your Universe Online Dark Energy is one of the major puzzles of modern astronomy, and one tool that astronomers use to understand this force is encoded in the distribution of clusters of galaxies. A new study by a team of astronomers, led by Dr. Jeeseon Song at the University of Michigan, has yielded exquisitely precise distances of a large sample of clusters. These precise distances may lead to breakthroughs in understanding the expansion history of our...

Dark Matter Detector Gets Helping Hand From Livermore Team
2012-11-16 05:58:38

April Flowers for redOrbit.com - Your Universe Online Nearly a mile underground beneath the Black Hills of South Dakota, scientists from Lawrence Livermore National Laboratory (LLNL) are using a tank to make key contributions to a physics experiment that will look for one of nature's most elusive particles, "dark matter." The Large Underground Xenon (LUX) experiment located at the Sanford Underground Research Facility in Lead, SD is the most sensitive detector of its kind to look for...

Crowdsourcing Project Could Help Find Dark Matter
2012-11-01 04:18:38

Lee Rannals for redOrbit.com - Your Universe Online Elusive dark matter makes up for about 95 percent of the mass of the universe, but scientists have had a hard time finding it. Now, researchers are inviting the public to help them in searching for one of science's biggest mysteries. Astronomers from the University of Edinburgh have joined with crowdsourcing data science website Kaggle and Winton Capital Management to find people who are interested in taking up the challenge. The...


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...

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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