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Latest Galaxy formation and evolution Stories

Hubble Reveals First Visual Evidence Of Milky Way's Formative Years
2013-11-14 16:35:20

HubbleSite NASA's Hubble Space Telescope has provided the first visual evidence showing how our home galaxy, the Milky Way, assembled itself into the majestic pinwheel of stars we see today. Perusing Hubble's deep-sky surveys, astronomers traced 400 galaxies similar to our Milky Way at various stages of construction over a time span of 11 billion years. "For the first time we have direct images of what the Milky Way looked like in the past," said study co-leader Pieter G. van Dokkum...

earliest galaxy ever found
2013-11-01 14:54:20

[ Watch the Video: Lucky Find For Astronomers - Most Distant, Earliest Galaxy Yet ] Brett Smith for redOrbit.com - Your Universe Online Using data from the recently conducted survey of the early universe performed by NASA’s Hubble Space Telescope, an international team led by American astronomers has identified the most distant and earliest galaxy ever detected, according to a recently published report in the journal Nature. Although many other more distant candidates for the...

Giant Gas Cloud Magnetic Shield Milky Way
2013-11-01 10:13:00

redOrbit Staff & Wire Reports - Your Universe Online Astronomers have discovered a magnetic field deep within the Smith Cloud’s interior that may protect the giant galactic streamer of hydrogen gas during its projected collision with the Milky Way galaxy. The discovery, which was made using the Karl G. Jansky Very Large Array (VLA) and Robert C. Byrd Green Bank Telescope (GBT), could help explain how so-called high velocity clouds (HVCs) remain mostly intact during their mergers with...

Astronomers Discover The Most Distant Galaxy Yet In The Universe
2013-10-23 16:48:14

Lawrence LeBlond for redOrbit.com - Your Universe Online A team of Texas and California scientists have discovered the most distant galaxy to date, after searching through a database of nearly 100,000 galaxies imaged by the Hubble Space Telescope as part of the CANDELS survey. Bahram Mobasher and Naveen Reddy of University of California, were part of the team who discovered this distant galaxy. They collaborated on the project with researchers from Texas A&M University, the...

Hubble Space Telescope
2013-09-14 03:38:45

redOrbit Staff & Wire Reports - Your Universe Online Researchers from the Harvard-Smithsonian Center for Astrophysics (CfA) report that they have solved the mystery of why none of the unusually small galaxies known as “red nuggets” were seen nearby – they were essentially hiding in plain sight. These “red nuggets,” so named because of their miniature size and the fact that they are densely packed with stars of that color, had only been observed in the distant, young...

Clumpy Structure Makes Disk Galaxies Look Alike Over Time
2013-09-12 06:49:36

redOrbit Staff & Wire Reports - Your Universe Online Researchers at Iowa State University and IBM have identified why virtually all disk galaxies grow out of their irregular, clumped appearance, and why their older stars acquire the same smooth look as they fade from a bright center to a faint edge. The astronomers say that whether these young disk galaxies are big, small, isolated or crowded in a cluster, the reason they all eventually look alike is due to their clumpy structure,...

Hubble Explores Origins Of Galaxies
2013-08-15 11:29:11

John P. Millis, PhD for redOrbit.com - Your Universe Online One of the major astronomical advancements of the 20th century was the ability to study in great detail the galaxies that make up our Universe. Instruments like the Hubble Space Telescope (HST) have brought a level of resolution that has allowed us to trace the history and evolution of galactic dynamics. Currently, galaxies are classified by the Hubble Sequence – a system whereby galaxies are grouped by their sizes, shapes,...

Old Age Makes Monster Galaxies Picky Eaters
2013-08-02 13:32:17

Brett Smith for redOrbit.com - Your Universe Online A new analysis from scientists at NASA's Jet Propulsion Laboratory (JPL) revealed that supermassive galaxies have stopped cannibalizing their neighbors over the past few billion years. The finding calls current models for galactic growth into question. "We've found that these massive galaxies may have started a diet in the last 5 billion years, and therefore have not gained much weight lately," said Yen-Ting Lin of the Academia Sinica...

Why Do Quenched Galaxies Seem To Keep Growing?
2013-08-02 04:02:20

redOrbit Staff & Wire Reports - Your Universe Online Thanks to new data obtained from the Hubble Cosmological Evolution Survey (COSMOS), researchers have solved the mystery as to why some galaxies appear to grow larger even after they no longer form new stars. Once galaxies reach a point in their lives when they cease star formation, they are known as "quenched" galaxies, report the authors of the new study. Quenched galaxies in the distant past appear to be much smaller than those...


Latest Galaxy formation and evolution Reference Libraries

45_03c916cf051c1a581c0d52b3ccdd7561
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...

45_274ba7ddcce89663fc213d79e864e44b
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...

6_11b0e50afd172f6a61aeda24e25504702
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...

6_53083d96ff77dbf99c47ef10b6a209332
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...

6_46f1290db7aabf07d0480393fea260ed2
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
cock-a-hoop
  • Exultant; jubilant; triumphant; on the high horse.
  • Tipsy; slightly intoxicated.
This word may come from the phrase 'to set cock on hoop,' or 'to drink festively.' Its origin otherwise is unclear. A theory, according to the Word Detective, is that it's a 'transliteration of the French phrase 'coq a huppe,' meaning a rooster displaying its crest ('huppe') in a pose of proud defiance.' Therefore, 'cock-a-hoop' would 'liken a drunken man to a boastful and aggressive rooster.'
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