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New Study Finds Clumps and Streams of Dark Matter in the Milky Way

One of the leading theories for how the universe evolved after the Big Bang is the Cold Dark Matter Theory (CDM). This theory proposes that chilly dark matter moved slowly in the early universe, allowing matter to clump together to form the clusters of galaxies that we see, instead of matter being distributed evenly across the universe. Using the properties of the CDM theory, astronomers recently ran an intensive computer program using one of the world's most powerful supercomputers to simulate the halo of dark matter that envelopes our galaxy. The simulation revealed dense clumps and streams of the mysterious dark matter lurking within our Milky Way galaxy, including the region of our solar system.

Minimum Mass for Galaxies Provides Insight on Dark Matter

More news on dark matter this week: By analyzing light from dwarf galaxies that orbit the Milky Way, scientists believe they have discovered the minimum mass for galaxies in the universe – 10 million times the mass of the sun. This mass could be the smallest known “building block” of the mysterious, invisible substance called dark matter. Stars that form within these building blocks clump together and turn into galaxies. Scientists know very little about the microscopic properties of dark matter, even though it accounts for approximately five-sixths of all matter in the universe. “By knowing this minimum galaxy mass, we can better understand how dark matter behaves, which is essential to one day learning how our universe and life as we know it came to be,” said Louis Strigari, lead author of this study from the University of Cal

Dark matter and normal matter 'divorce' in cosmic clash

Hot gas (shown in pink) in two merging galaxy clusters slowed down after impact, but their dark matter (blue) continued on unimpeded. Astronomers made this map of the clusters' matter distribution by studying how their mass gravitationally distorted light from background galaxies (Image: NASA/ESA/CXC/M Bradac/UCSB/S Allen/Stanford)

Study finds dark matter may be near Earth

Dark matter is one of the holy grails of astronomy since little is known about it though theories say it accounts for 90 per cent of the matter of the Universe. In this image, a purple haze shows dark matter flanking the "Bullet Cluster."

Dark Matter is Missing From Cosmic Voids

Cosmic voids really are devoid of matter. Astronomers have found that even the pervasive 'dark matter' which accounts for about 80% of the mass of the universe is not present in these voids, which are areas of vast emptiness in space that can be tens of millions of light-years across. "Astronomers have wondered for a quarter-century whether these voids were 'too big' or 'too empty' to be explained by gravity alone," said University of Chicago researcher Jeremy Tinker, who led the new study using data from the Sloan Digital Sky Survey II (SDSS-II). "Our analysis shows that the voids in these surveys are exactly as big and as empty as predicted by the 'standard' theory of the universe."

Space Dust Is Dark Matter

A small number of scientists defines space dust as the observable portion of dark matter. Space dust is comprised of small particles (about 0.1 mm) which reflect light on a very large scale. This is what can be seen of dark matter, not observable directly, but its hypothetical effects have been noticed.

Stars that Eat Dark Matter Live Longer

A recent study indicates that there are stars in the proximity of the Milky Way's core that feed on dark matter, thus prolonging their lifespan with more than a billion years. Finding them would possibly help understanding what dark matter really is and how exactly it functions.

Simulation Predicts Clumps of Dark Matter Within Galaxies

A team of researchers has simulated the gravitational interaction of dark matter particles over the course of a hypothetical 13.7 billion years. They found that the particles tended to form clumps large enough to assist in the formation of galaxies. The results contradicted observations from previous, smaller studies, but they lent support to an unrelated simulation of how the Milky Way formed. UCSC's press release is also available. Quoting ScienceNews: "The clumps of dark matter in the simulation have densities that are remarkably similar to densities that a University of California, Irvine research group found when simulating the formation of the Milky Way and its satellite dwarf galaxies, says James Bullock, the astrophysicist who leads the UC-Irvine group and was not involved in the new study.

Powerful Cosmic Collision Creates Divorce of Matter

NASA's Hubble Space Telescope and Chandra X-ray Observatory show dark matter from each cluster appearing to pass through the cosmic mess unscathed, leaving ordinary matter behind in the galactic pileup.

Space Observatory May Have Found Dark Matter

KentuckyFC writes to mention that new data from the orbiting observatory PAMELA may shed some additional light on the question of dark matter. Still only a preliminary announcement, the new findings apparently support the "Minimal Dark Matter" model where a particle called a "Wino" is responsible.

Dark matter and nanotech may vie for Nobel prizes

A scientist who helped prove the existence of dark matter and a researcher who used the power of jellyfish to glow green in experiments may win Nobel prizes, Thomson Reuters said on Wednesday.

Dark matter and nanotech may vie for Nobel prizes

LONDON (Reuters) - A scientist who helped prove the existence of dark matter and a researcher who used the power of jellyfish to glow green in experiments may win Nobel prizes, Thomson Reuters said on Wednesday.

Dark matter and nanotech may vie for Nobel prizes

LONDON (Reuters) - A scientist who helped prove the existence of dark matter and a researcher who used the power of jellyfish to glow green in experiments may win Nobel prizes, Thomson Reuters said on Wednesday.

Dark matter and nanotech may vie for Nobel prizes

LONDON (Reuters) - A scientist who helped prove the existence of dark matter and a researcher who used the power of jellyfish to glow green in experiments may win Nobel prizes, Thomson Reuters said on Wednesday.

Dark matter and nanotech may vie for Nobel prizes

LONDON, Oct 1 (Reuters) - A scientist who helped prove the existence of dark matter and a researcher who used the power of jellyfish to glow green in experiments may win Nobel prizes, Thomson Reuters said on Wednesday.

Dark matter, new planets could bring physics Nobel

(AP) -- Scientists who have pursued dark matter, hunted for undiscovered planets and advanced nanotechnology were being touted Monday as candidates for the 2008 Nobel Prize in physics.

Is dark matter a wimp or a champ?

The galaxy's magnetic field lines appear to be horizontal, lying in the same plane as the galactic disc (shown, edge on). That could keep electrically charged dark matter particles outside of the disc, and beyond detection by Earth-based experiments (Image: 2MASS/J Carpenter/T Jarret/R Hurt)

Pamela picks up 'dark matter' signs

European astronomers say the mysterious dark matter may have been detected by the Pamela space probe.

Pamela Picks Up 'Dark Matter' Signs

European astronomers say the mysterious dark matter may have been detected by the Pamela space probe.

Study finds dark matter may be near Earth

U.S. and Swiss researchers say computer simulations suggest dark matter exists within the Milky Way galaxy and near Earth's solar system.

Particle surge casts light on dark matter

SCIENTISTS may have detected dark matter - the mysterious substance thought to make up 85 per cent of the universe - for the first time.

Astronomers Discover Most Dark Matter-Dominated Galaxy in Universe

Segue 1 is 50 times dimmer than the star cluster pictured above but is 1000 times more massive meaning most of its mass must be made up of dark matter. (Credit: Sloan Digital Sky Survey)

Colliding galaxies shed light on dark matter

WASHINGTON (Reuters) - Astronomers have captured images of a powerful collision of galaxy clusters and say it may shed light on the behavior of dark matter.

Colliding galaxies shed light on dark matter

WASHINGTON (Reuters) - Astronomers have captured images of a powerful collision of galaxy clusters and say it may shed light on the behavior of dark matter.

Some solar flares may be caused by dark matter

London, Aug 24: New calculations have suggested that some solar flares may be caused by dark matter particles called axions spewing out from the centre of the Sun.

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