Latest Galaxy formation and evolution Stories

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...

Universe At Peak Observation Period 13 Billion Years Ago
2012-05-23 11:22:26

Lee Rannals for RedOrbit.com Harvard-Smithsonian Center for Astrophysics theorist Avi Loeb says that modern time is not the ideal scenario to study the universe, but rather about 13 billion years ago was. Loeb said that according to his new calculations, just about 500 million years after the Big Bang proves to be the best-case scenario when studying our cosmos.  He says that the farther you go into the future, the more information you lose, making our time period better than those...

Herschel Space Observatory Finds Galaxy-packed Supercluster
2012-05-18 10:11:42

Researchers from McGill University in Canada, utilizing a European space telescope, have discovered a dazzling display of billions of new stars in a galaxy-packed filament about 4,500 light years away in the Cygnus-X star-forming region of the Cygnus constellation. The Herschel Space Observatory´s discovery shows a filament connecting two clusters of galaxies that, along with a third cluster, will smash together and provide astronomers with one of the largest galaxy superclusters in...

Baby Galaxies Grew Up Faster Than Previously Believed
2012-05-18 03:53:28

[ Watch the Video ] Baby galaxies from the young Universe more than 12 billion years ago evolved faster than previously thought, shows new research from the Niels Bohr Institute. This means that already in the early history of the Universe, there was potential for planet formation and life. The research results have been published in the scientific journal, Monthly Notices of the Royal Astronomical Society Letters. For several thousand years after the Big Bang 13.7 billion years ago,...

Black Holes Stop Star Births In Galaxies
2012-05-09 13:49:28

Astronomers have found that a number of stars that form during the early lives of galaxies may be influenced by the massive black holes in the center of the celestial suburb. The team, using the European Space Agency's (ESA) Herschel Space Observatory, looked a distant galaxies that were far enough away that the light reaching Herschel is from billions of years ago. "Herschel provides a new perspective and is conducting a number of surveys of galaxies near and far, in order to unravel...

Image 1 - Milky Way’s Companions May Spell Trouble For Dark Matter
2012-04-25 07:46:27

Astronomers from the University of Bonn in Germany have discovered a vast structure of satellite galaxies and clusters of stars surrounding our Galaxy, stretching out across a million light years. The work challenges the existence of dark matter, part of the standard model for the evolution of the universe. PhD student and lead author Marcel Pawlowski reports the team´s findings in a paper in the journal Monthly Notices of the Royal Astronomical Society. The Milky Way, the galaxy we...

UCLA's "Time Machine" To Study Distant Galaxies
2012-04-13 10:28:20

[ Watch the Video ] A team of researchers at the University of California, Los Angeles (UCLA) are building an advanced scientific instrument unlike any other ever built before, with the aim to study some of the oldest galaxies in the universe. The five-ton spectrometer, known as MOSFIRE (Multi-Object Spectrometer for Infra-Red Exploration), has been installed in the Keck I Telescope at the WM Keck Observatory in Hawaii where, once fully operational, it will receive infrared light that...

Image 1 - GOODS-Herschel Reveals Gas Mass Role In Creating Fireworks Versus Beacons Of Star Formation
2012-03-27 09:24:29

A study of galaxies in the deepest far-infrared image of the sky, obtained by the Herschel Space Observatory, highlights the two contrasting ways that stars formed in galaxies up to 12 billion years ago. Dr Georgios Magdis will present the results at the National Astronomy Meeting in Manchester. Recent results from Herschel show that gas-rich galaxies in the early universe were able to create stars at an intense rate. In the nearby universe, we only see such high rates of star formation...

Multicolor space nebula
2012-03-14 16:22:02

It has been widely known by astronomers that the earliest galaxies were much smaller than the large spiral and elliptical galaxies that exist now. As galaxies grow, they eat and put on weight, but exactly how they do this remains a mystery. Looking at a few, very carefully selected galaxies, astronomers are conducting a survey to determine how these galaxies grew during their “teenage” years, or the period between 3 and 5 billion years after the big bang theory. The team of...

2012-03-14 13:39:07

Astronomers have known for some time that the earliest galaxies were much smaller than the impressive spiral and elliptical galaxies that now fill the Universe. Over the lifetime of the cosmos galaxies have put on a great deal of weight but their food, and eating habits, are still mysterious. A new survey of carefully selected galaxies has focused on their teenage years – roughly the period from about 3 to 5 billion years after the Big Bang. By employing the state-of-the-art...

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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