Saturday, 22 December 2012

Are we closer to discover Dark Matter?

Dark matter makes up about 23 percent of the mass-energy content of the universe, even though we don’t know what it is or have yet to directly see it (which is why it’s called “dark”). So how can we detect it and when we do, what will it reveal about the universe? In mid-October, more than 100 cosmologists, particle physicists and astrophysicists gathered for a meeting called "Dark Matter Universe: On the Threshold of Discovery" at the National Academy of Sciences’ Beckman Center in Irvine, CA. Their goal: to take stock of the latest theories and findings about dark matter, assess just how close we are to detecting it and spark cross-disciplinary discussions and collaborations aimed at resolving the dark matter puzzle.
The image above is one of the most detailed maps of dark matter in our universe ever created. The location of the dark matter (tinted blue) was inferred through observations of magnified and distorted distant galaxies seen in this picture.

Wednesday, 19 December 2012

New Type, biggest known ultra black holes

The black hole at the center of this galaxy is part of a survey of 18 of the biggest black holes in the universe. This large elliptical galaxy is in the center of the galaxy cluster PKS 0745-19, which is located about 1.3 billion light years from Earth. X-ray data from NASA's Chandra X-ray Observatory are shown in purple and optical data from the Hubble Space Telescope are in yellow.

Friday, 23 November 2012

Dark energy hidden in cosmic voids

IF YOU gaze long enough into the void, the void might begin to speak to you. Giant regions of near-empty space known as cosmic voids could help us get a handle on dark energy, the mysterious stuff that is speeding up the expansion of the universe.

Saturday, 17 November 2012

First Light for the Millennium Run Observatory

The famous Millennium Run (MR) simulations now appear in a completely new light - literally. The project, led by Gerard Lemson of the MPA and Roderik Overzier of the University of Texas, combines detailed predictions from cosmological simulations with a virtual observatory in order to produce synthetic astronomical observations.

Thursday, 15 November 2012

Dark energy is real, say astronomers

Researchers conclude that there is a 99.996 percent chance that the mysterious force is responsible for the hotter parts of the cosmic microwave background.

Wednesday, 14 November 2012

Higgs boson suspicious behavior

The world's favourite particle is proving far too well-behaved for physicists' liking. The first major update from the Large Hadron Collider since a particle resembling the Higgs boson was discovered in July rules out one way in which the boson might open the door to new physics, and weakens another.

Sunday, 11 November 2012

Hubble Goes to the eXtreme to Assemble Farthest Ever View of the Universe

Like photographers assembling a portfolio of best shots, astronomers have assembled a new, improved portrait of mankind's deepest-ever view of the universe.

Friday, 9 November 2012

Dark Flow phenomena

Dark flow is an astrophysical term describing a possible non-random component of the peculiar velocity of galaxy clusters. The actual measured velocity is the sum of the velocity predicted by Hubble's Law plus a small and unexplained (or dark) velocity flowing in a common direction.

Wednesday, 7 November 2012

Great Attractor

The Great Attractor is a gravity anomaly in intergalactic space within the range of the Centaurus Supercluster that reveals the existence of a localized concentration of mass equivalent to tens of thousands of Milky Ways, observable by its effect on the motion of galaxies and their associated clusters over a region hundreds of millions of light years across.

These galaxies are all redshifted, in accordance with the Hubble Flow, indicating that they are receding relative to us and to each other, but the variations in their redshift are sufficient to reveal the existence of the anomaly. The variations in their redshifts are known as peculiar velocities, and cover a range from about +700 km/s to −700 km/s, depending on the angular deviation from the direction to the Great Attractor.

Quantum teleportation leaps forward

Quantum information has leapt through the air about 100 kilometers or more in two new experiments, farther and with greater fidelity than ever before. The research brings truly long-distance quantum communication networks, in which satellites could beam encrypted information around the globe, closer to reality.

Tuesday, 6 November 2012

Dark matter filament illuminated

An invisible web thought to span the cosmos has now revealed one of its strands.

That thread is spun of dark matter and connects two titanic clusters of galaxies, some of the most massive objects in the universe. Its discovery supports the idea that galaxy clusters grow at the intersections of such filaments, and its heft backs the claim that filaments hide more than half of all matter.

Monday, 5 November 2012

Galaxies could give glimpse of the instant time began

The structure of the universe at its very first instant – when time itself was still emerging – may be visible in the pattern of galaxies today. That's the latest prediction of a theory that fuses quantum mechanics and Einstein's general theory of relativity.

Sunday, 4 November 2012

Cohabiting black holes challenge theory

Hiding in a clump of stars 10,000 light-years away are two small black holes, slowly sipping their stellar prey.

Saturday, 3 November 2012

Astronomers spot leftover light from ancient stars

Light from the universe’s very first stars still lingers in space. Now, astronomers have a new way to catch it: Distant, ultra-bright galaxies that act as cosmic beacons, capturing relict photons in a blaze of gamma rays.