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Latest Dark matter Stories

Cosmic Effect Detection May Bring Universe's Formation Into Sharper Focus
2012-03-22 03:45:32

The first observation of a cosmic effect theorized 40 years ago could provide astronomers with a more precise tool for understanding the forces behind the universe's formation and growth, including the enigmatic phenomena of dark energy and dark matter. A large research team from two major astronomy surveys reports in a paper submitted to the journal Physical Review Letters that scientists detected the movement of distant galaxy clusters via the kinematic Sunyaev-Zel'dovich (kSZ) effect,...

2012-03-21 14:36:40

The behavior of some of the most elusive particles in the known universe can be simulated using three atoms in a lab, researchers at the Centre for Quantum Technologies (CQT) at the National University of Singapore have found. Principal Investigator Dimitris G. Angelakis and his group members Changsuk Noh and Blas Rodriguez-Lara have devised a scheme that uses the quantum states of three charged ions to simulate the 'oscillations' of neutrinos. The proposal is published in the March issue...

New Experiments Find Neutrinos Did Not Travel Faster Than Light
2012-03-17 04:37:23

Neutrinos that appeared to travel faster than the speed of light during an experiment last year actually travelled at exactly light speed, new research from the European Organization for Nuclear Research (CERN) has revealed. According to CNET reporter Stephen Shankland, the controversy began in September 2011, when the members of a CERN experiment team known as Opera fired neutrinos from the organization's underground particle accelerator near Geneva to the Gran Sasso National Laboratory...

Image 1 - Researchers Send Neutrino Message Through Solid Stone
2012-03-16 03:44:13

For the first time, a team of U.S. researchers have successfully used a beam of neutrinos--extremely low mass particles that can travel at the speed of light--to transmit a message through an obstacle. According to a Wednesday article from Ars Technica reporter Casey Johnston, the scientists, who were representing the University of Rochester and North Carolina State University (NC State), fired the neutrinos through roughly 780 feet of solid bedrock. When the particles emerged on the other...

2012-03-15 16:53:06

A group of scientists led by researchers from the University of Rochester and North Carolina State University have for the first time sent a message using a beam of neutrinos — nearly massless particles that travel at almost the speed of light. The message was sent through 240 meters of stone and said simply, "Neutrino." "Using neutrinos, it would be possible to communicate between any two points on Earth without using satellites or cables," said Dan Stancil, professor of electrical...

Chandra Helps To Capture Elusive Abell 383
2012-03-15 07:51:24

Two teams of astronomers have used data from NASA's Chandra X-ray Observatory and other telescopes to map the distribution of dark matter in a galaxy cluster known as Abell 383, which is located about 2.3 billion light years from Earth. Not only were the researchers able to find where the dark matter lies in the two dimensions across the sky, they were also able to determine how the dark matter is distributed along the line of sight. Dark matter is invisible material that does not emit or...

2012-03-14 22:19:10

Two teams of astronomers have used data from NASA's Chandra X-ray Observatory and other telescopes to map the distribution of dark matter in a galaxy cluster known as Abell 383, which is located about 2.3 billion light years from Earth. Not only were the researchers able to find where the dark matter lies in the two dimensions across the sky, they were also able to determine how the dark matter is distributed along the line of sight. Dark matter is invisible material that does not emit...

Image 1 - Gravitational Lens Reveals Details Of Distant, Ancient Galaxy
2012-03-09 03:01:37

Thanks to the presence of a natural “zoom lens” in space, University of Chicago scientists working with NASA´s Hubble Space Telescope have obtained a uniquely close-up look at the brightest gravitationally magnified galaxy yet discovered. The imagery offers a visually striking example of gravitational lensing, in which one massive object´s gravitational field can magnify and distort the light coming from another object behind it. Such optical tricks stem from...

2012-03-08 14:51:43

An international particle physics collaboration today announced its first results toward answering a longstanding question — how the elusive particles called neutrinos can appear to vanish as they travel through space. The result from the Daya Bay Reactor Neutrino Experiment [link: http://dayawane.ihep.ac.cn/] describes a critical and previously unmeasured quality of neutrinos — and their antiparticles, antineutrinos — that may underlie basic properties of matter and...

Image 1 - Important Clue Uncovered For Origins Of A Type Of Supernovae Explosion
2012-03-04 06:11:31

Pitt team used Sloan Digital Sky Survey to determine that the merger of double white dwarfs is a plausible explanation for Type Ia supernovae The origin of an important type of exploding stars–Type Ia supernovae–have been discovered, thanks to a research team at the University of Pittsburgh. Studying supernovae of this type helps researchers measure galaxy distances and can lead to important astronomical discoveries. A paper detailing this research has been accepted for...


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
holluschickie
  • A 'bachelor seal'; a young male seal which is prevented from mating by its herd's older males (mated bulls defending their territory).
This comes from the Russian word for 'bachelors.'
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