News tagged with cluster galaxies

Examining the Great Wall

Structure exists on nearly all scales in the universe. Matter clumps under its own gravity into planets, stars, galaxies, clusters, and superclusters. Beyond even these in scale are the filaments and voids. ...

May 10, 2011
5 / 5 (3) 5

Large galaxies stopped growing 7 billion years ago

(PhysOrg.com) -- Galaxies are thought to develop by the gravitational attraction between and merger of smaller 'sub-galaxies', a process that standard cosmological ideas suggest should be ongoing. But new ...

Apr 20, 2011
4.9 / 5 (7) 4 | with audio podcast

Dark statistics

The hypothetical dark flow seen in the movement of galaxy clusters requires that we can reliably identify a clear statistical correlation in the motion of distant objects which are, in any case, flowing o ...

Mar 28, 2011
4.8 / 5 (13) 15

Image: Einstein's theory fights off challengers

(PhysOrg.com) -- Two new studies have put Einstein's General Theory of Relativity to the test like never before, using observations of galaxy clusters to study the properties of gravity on cosmic scales.

Mar 24, 2011
4.3 / 5 (4) 6

Enriching the intracluster medium

(PhysOrg.com) -- Galaxies are sometimes found in large clusters with many hundreds of members. Typically there is a giant elliptical galaxy near the center; most of these ellipticals are very bright emitters ...

Mar 22, 2011
5 / 5 (2) 4

The most distant mature galaxy cluster

Astronomers have used an armada of telescopes on the ground and in space, including the Very Large Telescope at ESO's Paranal Observatory in Chile to discover and measure the distance to the most remote mature ...

Mar 09, 2011
4.9 / 5 (9) 70 | with audio podcast

The warped ways of cosmic light

Albert Einstein predicted them, modern giant telescopes detected them – and Klaus Dolag simulates them on a computer: gravitational lenses. The academic staff member at the Max Planck Institute for Astrophysics ...

Mar 02, 2011
4 / 5 (6) 2

The two-faced whirlpool galaxy

(PhysOrg.com) -- These images by NASA's Hubble Space Telescope show off two dramatically different face-on views of the spiral galaxy M51, dubbed the Whirlpool Galaxy.

Jan 14, 2011
4.9 / 5 (8) 0 | with audio podcast

Astronomers identify most distant galaxy cluster

(PhysOrg.com) -- Astronomers have uncovered a burgeoning galactic metropolis, the most distant known in the early universe. This ancient collection of galaxies presumably grew into a modern galaxy cluster ...

Jan 12, 2011
4.4 / 5 (13) 1 | with audio podcast

Planck unveils wonders of the Universe (w/ Video)

(PhysOrg.com) -- The first scientific results from ESA’s Planck mission were released at a press briefing today in Paris. The findings focus on the coldest objects in the Universe, from within our Galaxy ...

Jan 11, 2011
4.9 / 5 (8) 1 | with audio podcast