Latest Galaxy formation and evolution Stories

New Australian Telescope Could Find 700,000 Galaxies
2012-11-09 19:34:57

Lee Rannals for redOrbit.com — Your Universe Online Australian researchers wrote in a paper published Sunday in the Monthly Notices of the Royal Astronomical Society that there could be another 700,000 galaxies out there ready to be found by a new telescope. The researchers have combined computer simulations with CSIRO´s next-generation Australian Square Kilometre Array Pathfinder (ASKAP) specifications to predict the new telescope's extraordinary capabilities....

Star Production In The Universe Is Slowing Down
2012-11-06 13:15:18

Lee Rannals for redOrbit.com - Your Universe Online Astronomers, writing in the journal Monthly Notices of the Royal Astronomical Society, have revealed that the rate of new stars in the Universe is dropping, which is a trend that could continue. The team of astronomers from five different countries said the rate of formation of new stars is now only 1/30th of its peak. The accepted model for evolution of the Universe suggests that stars began to form about 13.4 billion years ago....

The Local Universe Offered Up In Unprecedented Detail
2012-10-31 13:21:28

Lee Rannals for redOrbit.com - Your Universe Online The intimate details of 100 galaxies in the local universe have been published by the Calar Alto Legacy Integral Field Area survey (CALIFA). The survey offers up new data, representing the first large-scale effort at "two plus one" mapping of galaxies. For every pixel within each two-dimensional image, scientists could perform a detailed analysis and provide information about dynamics and chemical composition. This information could...

New Details Shed Light On Galaxy Evolution
2012-10-22 12:54:34

[WATCH VIDEO: Computer Model Shows a Disk Galaxy´s Life History] Lee Rannals for redOrbit.com — Your Universe Online After a comprehensive study of hundreds of galaxies, astronomers have uncovered a surprising trend in galaxy evolution. The team studied a sample of 544 blue galaxies from the Deep Extragalactic Evolutionary Probe 2 (DEEP2) Redshift Survey, and wrote about their findings in The Astrophysical Journal. "Astronomers thought disk galaxies in the nearby...

Gemini Observatory Catches Rare Glimpse Of Polar Ring Galaxy
2012-10-19 12:30:26

April Flowers for redOrbit.com - Your Universe Online Many images that we see from the space observatories are beautiful. Swirling colors and bright galaxies make for amazing images. But an image just released from the ground-based Gemini Observatory of the polar-ring galaxy NGC 660 might be the most hauntingly beautiful image ever. Add in the back story of a colorful and dramatic tale of two galaxies locked in a life-and-death struggle, and the picture becomes poetry in motion. All...

Galactic Collisions Between Big Galaxies Form Even Bigger Galaxies
2012-10-12 14:36:09

Brett Smith for redOrbit.com - Your Universe Online When massive galaxies belly-up to the interstellar buffet, their centers expand as they gobble up other galaxies that contain billions and billions of stars, according to a new report from University of Utah astronomers. "We found that during the last 6 billion years, the matter that makes up massive elliptical galaxies is getting more concentrated toward the centers of those galaxies. This is evidence that big galaxies are crashing...

Astronomers Describe Fireworks In The Early Universe
2012-09-27 19:28:13

Lee Rannals for redOrbit.com — Your Universe Online Astronomers suggest, in the Astrophysical Journal Letters, as galaxies formed in the early universe, they were accompanied by fireworks in the form of energy bursts. Active galaxies are easily detected due to their luminous radio, ultraviolet or X-ray radiation, which results from steady accretion onto their massive central black holes. Little has been known about the composition of these galaxies or their relationship to the...

Early Universe Lit Up By Explosion Of Growth
2012-09-07 05:29:14

April Flowers for redOrbit.com - Your Universe Online A new study from the University of California, Berkeley indicates that the birth of the first massive galaxies that lit up the early universe was an explosive event, happening faster and ending sooner than suspected. Around 13 billion years ago, when the universe was about 750 million years old, extremely bright, active galaxies formed and fully illuminated the universe, according to Oliver Zahn, a postdoctoral fellow at the Berkeley...

Milky Way Not The Only Galaxy On The Block
2012-08-23 13:09:05

Lee Rannals for redOrbit.com - Your Universe Online A new sky survey has revealed that our Milky Way galaxy may not be as special as scientists had previously thought. The Milky Way is a fairly common type of galaxy, but being paired up with neighbors like the Magellanic Clouds makes it stick out above the rest, so much so that astronomers thought it could be a one of a kind occurrence. However, astronomer Dr. Aaron Robotham burst everyone's bubble when searching for groups of...

Latest Galaxy formation and evolution Reference Libraries

2010-09-13 16:56:08

The Coma Cluster (Abell 1656), along with the Leo Cluster, is one of two major clusters compromising the Coma Supercluster. It contains over 1000 identified galaxies. Most of the galaxies in the center of the Coma Cluster are elliptical galaxies including both dwarf and giant. However the center is dominated by NGC 4874 and NGC 4889, two giant elliptical galaxies. The brightest galaxies are visible, a few degrees north of the galactic pole, with an amateur telescope larger than 20 cm. The...

2010-09-07 17:03:18

The Abell 520 galaxy cluster is an strange structure formed by a major merger. Due to its odd and chaotic nature it has been given the nick-name the Train Wreck Cluster. The Dark Matter within the cluster does not act as expected like it does in other clusters, therefore, Abell 520 creates problems for many of the prevailing theories about Dark Matter. It also disrupts many alternative theories of modified gravity. Similar to the Bullet Cluster the gas contents and galaxies within the...

2004-10-19 04:45:42

Ring Galaxy -- A subclass of interacting galaxies, ring galaxies, provides a unique laboratory for studying unusually large bursts of non-nuclear star formation. The rings in these systems are often large (10s of kiloparsecs) and contain what appear to be associations of giant H{\small II} regions. As a basis for future modeling of star forming regions in observed ring galaxies we present a series of combined n-body/gas numerical experiments on ring formation and evolution. Three...

2004-10-19 04:45:41

Molecular Cloud -- Molecular clouds are interstellar nebulae that have a density and size sufficient to permit the formation of H2, molecular hydrogen. However, this molecule is difficult to detect, and the molecule most used to trace the H2 is CO (carbon monoxide). The ratio between CO luminosity and H2 mass is roughly constant, although there are reasons to doubt this assumption in observations of some other galaxies. In the Milky Way, molecular clouds account for roughly one-half...

2004-10-19 04:45:41

Globular Cluster -- A globular cluster is a cluster of stars that is spherical in shape and extremely dense towards its core. Globular clusters are usually composed of hundreds of thousands of old stars, similar to the bulge of a spiral galaxy but confined to a volume of only a few cubic parsecs. Some globular clusters (like Omega Centauri in our Milky Way, and G1 in M31) are truly massive clusters, with several million times the mass of our Sun. Such globular clusters may be the...

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Word of the Day
  • In music, a work for a keyboard-instrument, like the pianoforte or organ, originally intended to utilize and display varieties of touch: but the term has been extended so as to include many irregular works, similar to the prelude, the fantasia, and the improvisation.
This word is Italian in origin, coming from the feminine past participle of 'toccare,' to touch.