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Latest Dark matter Stories

Cosmic Journey 13 Billion Years In The Making Seen By Plank
2013-04-02 11:43:48

ESA Cosmologists using data from ESA's Planck satellite have compiled the first all-sky image of the distribution of dark matter across the entire history of the Universe as seen projected on the sky. This is made possible by analyzing the tiny distortions imprinted on the photons of the Cosmic Microwave Background (CMB) by the gravitational lensing effect of massive cosmic structures. As photons traveled through these structures, which consist primarily of dark matter, their paths became...

Gravitational Lensing In The Unusual "Magatama" Galaxy
2013-04-01 09:37:32

Subaru Telescope In a course of studying young galaxies at a distance of 11.6 billion light years from Earth, a team of astronomers led by Professor Yoshiaki Taniguchi (Ehime University) noticed a strangely shaped galaxy that looks like a "magatama", an ancient, comma-shaped Japanese amulet made of stone. Subsequent research revealed that the magatama galaxy was actually an overlapping system of two young galaxies lying in an extremely close line of sight--an exceedingly rare occurrence...

Starburst Galaxies Observations Reveal They Occured Earlier In Universe Than Previously Believed
2013-03-13 14:29:45

WATCH VIDEO: [Gravitational Lensing of Distant Star-Forming Galaxies] Lee Rannals for redOrbit.com — Your Universe Online Astronomers reported in Nature and the Astrophysical Journal that starburst galaxies from early in the universe's history took place earlier than previously though. Scientists making observations with the Atacama Large Millimeter/submillimeter Array (ALMA) telescope say they have found that the most vigorous bursts of star birth in the universe actually took...

Closest Star System In A Century Found 6.5 Light Years Away
2013-03-11 16:28:34

Brett Smith for redOrbit.com - Your Universe Online Using data obtained from a NASA satellite, a Pennsylvania State University astronomer has identified the closest solar system to be found within the past 97 years. According to astronomer Kevin Luhman´s report in the Astrophysical Journal Letters, the newly identified system is a pair of brown dwarf stars and the third-closest system to the Sun. “The distance to this brown dwarf pair is 6.5 light years -- so close that...

What Is Dark Matter Podcast
2013-02-27 13:12:35

John P. Millis, PhD for redOrbit.com — Your Universe Online Listen to redOrbit's exclusive interview “What Is Dark Matter Podcast” with Dr. Matthew Walker (Or right-click on the above link to download the file to your computer) In the early 1930s, the Swiss astronomer Fritz Zwickey made a startling observation that would eventually become one of the greatest cosmological riddles of the twentieth century and beyond. While attempting to measure the mass of a large...

White Dwarfs May Host Habitable Exoplanets
2013-02-25 12:28:16

Lee Rannals for redOrbit.com - Your Universe Online Scientists are on the hunt to find habitable exoplanets, and a new discovery might mean there are even more candidates out there than previously thought. A new theoretical study suggests even dying stars might be able to have orbiting exoplanets that are hospitable to extraterrestrial life. As a star dies, its outer layers puff off, leaving behind a hot core known as a white dwarf which is typically about the size of...

MOND Theory Predict Key Property In Andromeda's Satellites
2013-02-15 11:58:01

April Flowers for redOrbit.com - Your Universe Online A research collaboration between Case Western University and Weizmann Institute of Science has used modified laws of gravity to closely predict a key property measured in faint dwarf galaxies that are satellites of the nearby giant spiral galaxy Andromeda. The study centers around the property of velocity dispersion, which is the average velocity of objects within a galaxy relative to each other. Velocity dispersion is by used...

Gaia Mission To Detect Ultra-cool Dwarfs In The Milky Way
2013-02-14 05:47:05

April Flowers for redOrbit.com - Your Universe Online There are small subsets of stars among the hundred billion in the Milky Way called ultra-cool dwarfs, which have a temperature below 2500 Kelvin. Both ultra-cool dwarfs and brown dwarfs exist at these lower temperatures. The lower temperatures indicate that these are some of the most ancient objects in our Galaxy, leading scientists to examine them for information on primitive chemical composition. The Gaia mission, which will be...

Dark Matter Detector Science Teams Named
2013-02-13 04:30:54

John P. Millis, Ph.D. for redOrbit.com — Your Universe Online In order to illuminate the darkness we turn to the light. Whether the sun, a lamp, or a candle, we rely on electromagnetic radiation to reveal the world, and indeed the Universe, around us. Everything that we see - every tree, every planet, and every star - we see because it emits, reflects, bends and focuses light to our eyes. Without the interaction of matter with light, we are blind. But what about matter that...

Lack Of Dwarf Galaxies Around Milky Way Perplexes Physicists
2013-02-01 11:48:09

Brett Smith for redOrbit.com - Your Universe Online Studying the physics of the universe can be a controversial and often contradictory proposition, with theories and calculations often not matching with observations. However, new research from Leibniz Institute for Astrophysics Potsdam in Germany, has shed some light on one situation involving differences between theory and observation. Scientists at the institute have found that a phenomenon known as “cosmic web...


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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