Latest Large-scale structure of the cosmos Stories

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...

Hubble Findings Cast Doubt On Dark Matter Theories
2012-03-03 07:42:50

The discovery of a dark matter mass left behind after what is being called a wreck between massive clusters of galaxies has experts questioning current theories regarding the invisible substance believed to make up more than 80% of the universe. According to a Friday press release from NASA, currently scientists theorize that galaxies should be anchored to dark matter, even in the event of a collision. However, astronomers using information gathered from the Hubble Telescope have...

Abell Galaxy Cluster Harbors Sloshing Clouds Of Gas
2012-01-31 05:00:32

A Naval Research Laboratory scientist is part of a team that has recently discovered that vast clouds of hot gas are "sloshing" in Abell 2052, a galaxy cluster located about 480 million light years from Earth. The scientists are studying the hot (30 million degree) gas using X-ray data from NASA's Chandra X-ray Observatory and optical data from the Very Large Telescope to see the galaxies. "The X-ray images were amazing. We were able to see gas sloshing like liquid in a glass" explains...

When Galaxy Clusters Collide
2012-01-10 15:18:03

A UC Davis graduate student who is leading a study of the collision of galaxy clusters 5 billion light years away discussed the team´s findings today, Jan. 10, in a press briefing at the annual meeting of the American Astronomical Society in Austin, Texas. “A galaxy cluster is like a little universe, because it has the same matter composition as the whole universe,” said William Dawson, a Ph.D. candidate in physics. “By studying this little universe, we can learn...

Image 1 - El Gordo - Largest Galaxy Cluster In The Early Universe
2012-01-10 13:17:23

[ Watch Video 1 ] | [ Watch Video 2 ] An extremely hot, massive young galaxy cluster – the largest ever seen in the distant Universe – has been studied by an international team using ESO´s Very Large Telescope (VLT) in the Atacama Desert in Chile along with NASA's Chandra X-ray Observatory and the Atacama Cosmology Telescope. The new results are being announced on 10 January 2012 at the 219th meeting of the American Astronomical Society in Austin, Texas. The newly...

Dark Matter Mapped On Largest Scale Observed
2012-01-10 06:03:52

Astronomers from the University of British Columbia and University of Edinburgh have mapped dark matter on the largest scale ever observed. The findings reveal a Universe comprised of an intricate cosmic web of dark matter and galaxies that span over a billion light years across. Researchers analyzed images of about 10 million galaxies in four different regions of the sky, and studied the distortion of the light emitted from these galaxies. "By analyzing light from the distant...

Latest Large-scale structure of the cosmos Reference Libraries

2010-09-16 15:18:29

The Virgo Cluster consists of galaxies at a distance of around 59 Mly away in the constellation Virgo. Containing between 1300 to 2000 galaxies the Virgo Cluster is the heart of the Local Supercluster. Its mass is estimated at 1.2 × 1015 M☉ out to 8 degrees of the cluster's center or a radius of about 2.2 Mpc. Most of the brighter galaxies in the cluster were discovered by Charles Messier in the late 1770's and early 1780's, including the giant elliptical Messier 87. Messier...

2010-09-16 15:14:03

The two Magellanic Clouds (or Nubeculae Magellani), composed of the Large Megellanic Cloud and the Small Magellanic Cloud, are irregular dwarf galaxies visible in the southern hemisphere. They are members of our Local Group and orbit the Milky Way galaxy. Persian astronomer Al Sufi, in 964, was the first to have written anything about the Magellanic Clouds proving they have been known since early time amongst the Middle East peoples. Sufi, in his Book of Fixed Stars, calls the clouds...

2010-09-16 15:00:46

The NGC 5866, located in the Draco constellation, is named after the galaxy with the highest magnitude however some catalogs list NGC 5907 as the brightest member. The M51 Group and the M101 Group are NGC 5866 closest neighbor. The distances between these groups are similar which suggest the three groups are part of a single large, loose, elongated group. However, most identification methods consider them separate.

2010-09-13 17:13:25

The M101 Group, one of many in the Virgo Supercluster, is located in Ursa Major and named after the brightest galaxy in the group, the Pinwheel Galaxy (M101). The group is composed mostly of members that are companions of the Pinwheel Galaxy. The M51 Group and the NGC 5866 Group are M101's closest neighbor. The distances between these groups are similar which suggest the three groups are part of a single large, loose, elongated group. However, most identification methods consider them...

2010-09-13 17:09:55

The M81 Group, containing the well known galaxies Messier 81 and Messier 82, is a group of galaxies within the constellation Ursa Major. Along with Messier 81 and 82 are several other galaxies with apparent brightness. The center, located at an approximate distance of 3.6 Mpc, is one of the nearest groups to the Local Group. The total estimated mass of the group is (1.03 ± 0.17) × 1012M☉. The Virgo Supercluster contains the M81 Group, the Local Group, and some other nearby...

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Word of the Day
  • A fool; a simpleton: a term of abuse common in Ireland and to a less extent in the Gaelic-speaking parts of Scotland.
This word is partly Irish in origin.