Latest Galaxy groups and clusters Stories

Galaxy cluster MCS J0416.1–2403
2014-07-26 03:30:45

ESA/Hubble Information Center Stunning new observations from Frontier Fields Astronomers using the NASA/ESA Hubble Space Telescope have mapped the mass within a galaxy cluster more precisely than ever before. Created using observations from Hubble's Frontier Fields observing program, the map shows the amount and distribution of mass within MCS J0416.1–2403, a massive galaxy cluster found to be 160 trillion times the mass of the Sun. The detail in this mass map was made possible thanks...

Bullet Group
2014-06-14 03:00:23

ESA Galaxies are not as isolated as they at first glance may seem; on a cosmic scale they congregate in clumps along with dark matter and hot gas. The colorful blob in this new composite image, based on data from several telescopes including ESA's XMM-Newton, is the group of galaxies known as the Bullet Group. Its components appear to be clearly separated, with the hot gas partitioned from the rest of the mass within the group. This is the smallest object ever found to show such an effect,...

Kinetic Sunyaev-Zel'dovich Effect Observed In Individual Object For The First Time
2014-01-17 11:14:32

redOrbit Staff & Wire Reports - Your Universe Online Scientists from the California Institute of Technology (Caltech) and NASA’s Jet Propulsion Laboratory (JPL) report in a recent study that they have observed a change in an individual object’s cosmic microwave background radiation resulting from its interaction with massive moving objects for the first time ever. According to the recently-published paper in The Astrophysical Journal, this phenomenon, which is known as the...

Hot Gas Bridging Galaxy Cluster Pair Spotted By Plank
2012-11-20 10:46:32

ESA ESA´s Planck space telescope has made the first conclusive detection of a bridge of hot gas connecting a pair of galaxy clusters across 10 million light-years of intergalactic space. Planck´s primary task is to capture the most ancient light of the cosmos, the Cosmic Microwave Background, or CMB. As this faint light traverses the Universe, it encounters different types of structure including galaxies and galaxy clusters — assemblies of hundreds to thousands of...

Hubble Helps Map Dark Matter In 3D
2012-10-17 04:20:05

April Flowers for redOrbit.com - Your Universe Online A giant filament of dark matter extends 60 million light-years from one of the most massive galaxy clusters known. Leftover from the very first moments after the Big Bang, the filament is part of the cosmic web that constitutes the structure of the Universe. Scientists using the NASA/ESA Hubble Space Telescope have studied this filament in 3D for the first time and conclude that if the filament is representative of the rest of the...

2012-07-10 13:19:20

Lee Rannals for redOrbit.com - Your Universe Online For the first time, scientists have detected part of the invisible dark matter skeleton of the universe, where over half of all matter is believed to reside. The discovery confirms a key prediction in the theory of how the universe's current web-like structure came to be. The map of the known universe shows that most galaxies are organized into clusters, but some are situated along filaments that connect to the clusters....

Researchers Make Celestial Observation, Despite Astronomical Odds
2012-06-27 05:19:07

Lee Rannals for redOrbit.com Astronomers were able to beat the odds by observing gravitational lensing taking place at 10 billion light-years away from Earth. Gravitational lensing is the bending of light from a distant galaxy, and it has never been observed behind a cluster at this range before. The giant arc is the stretched shape of a more distant galaxy whose light is distorted by the cluster's powerful gravity. Astronomers reported in the July 10 issue of The Astrophysical...

2012-06-04 09:22:45

More atomic hydrogen gas – the ultimate fuel for stars – is lurking in today´s Universe than we thought, CSIRO astronomer Dr Robert Braun has found. This is the first accurate measurement of this gas in galaxies close to our own. Just after the Big Bang the Universe´s matter was almost entirely hydrogen atoms. Over time this gas of atoms came together and generated galaxies, stars and planets – and the process is still going on. Astronomers want to understand...

Astronomers Discover New Galaxy Cluster - Musket Ball
2012-04-13 03:33:15

Using a combination of powerful observatories in space and on the ground, astronomers have observed a violent collision between two galaxy clusters in which so-called normal matter has been wrenched apart from dark matter through a violent collision between two galaxy clusters. The newly discovered galaxy cluster is called DLSCL J0916.2+2951. It is similar to the Bullet Cluster, the first system in which the separation of dark and normal matter was observed, but with some important...

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,...

Latest Galaxy groups and clusters Reference Libraries

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...

2004-10-19 04:45:42

Star Cluster -- Star clusters are physically bound systems of stars. In order of low compactness to high compactness (and in some sense also age) they range from stellar associations to open clusters to globular clusters. Star clusters are held together by the gravitation of their members. Due to both external (encounters with massive objects, influence of the host galaxy) and internal (encounters with other cluster members, stellar evolution) influences, clusters slowly evaporate. Their...

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Word of the Day
  • A unit of saved energy.
Coined by Amory Lovins, chairman of the Rocky Mountain Institute as a contraction of negative watt on the model of similar compounds like megawatt.