Latest Physical cosmology Stories

Hubble Sets Dark Matter Record Straight
2012-11-29 19:24:08

Lee Rannals for redOrbit.com — Your Universe Online A new observation of Abell 520 using the Hubble Space Telescope has helped astronomers determine that the core of the galaxy cluster is not over-dense in dark matter after all. Astronomers earlier this year spotted an overabundance of dark matter in the heart of the galaxy cluster. This observation was puzzling because dark matter and galaxies should be anchored together. Scientists have evidence that dark matter is...

Scientists Offer New Insights Into Early Universe
2012-11-29 15:54:22

Lee Rannals for redOrbit.com — Your Universe Online Penn State University scientists using techniques from modern physics have developed a new understanding of the earliest eras in the history of the universe. The scientists now have an extended analyses that include quantum physics farther back in time than ever before, heading back to the very beginning. The new paradigm of loop quantum origins show that the large-scale structures we see in the universe evolved from...

Galaxy Clusters Offer Insight On Dark Matter
2012-11-21 09:56:07

April Flowers for redOrbit.com - Your Universe Online Dark Energy is one of the major puzzles of modern astronomy, and one tool that astronomers use to understand this force is encoded in the distribution of clusters of galaxies. A new study by a team of astronomers, led by Dr. Jeeseon Song at the University of Michigan, has yielded exquisitely precise distances of a large sample of clusters. These precise distances may lead to breakthroughs in understanding the expansion history of our...

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...

BOSS Survey Reveals 48,000 Quasars
2012-11-13 10:38:57

Lee Rannals for redOrbit.com - Your Universe Online The Baryon Oscillation Spectroscopic Survey (BOSS) has announced the first major result of a new mapping technique, unveiling over 48,000 quasars. BOSS is the largest program of the third Sloan Digital Sky Survey (SDSS) and is mapping a huge volume of space to measure the role of dark energy in the evolution of the universe. “No technique for dark energy research has been able to probe this ancient era before, a time when...

Rare Supernovae Are The Most Luminous Ever Observed
2012-11-02 04:39:13

April Flowers for redOrbit.com - Your Universe Online An international team, including Raymond Carlberg of the University of Toronto's Department of Astronomy & Astrophysics, has discovered the most-distant, super-luminous supernovae observed to date. The violent stellar explosions which caused these supernovae would have occurred soon after the Big Bang when the universe was much younger. "The objects are both unusually bright and unusually slow to fade. These are properties that...

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...

Stars Living On The Edge
2012-10-25 04:37:37

April Flowers for redOrbit.com - Your Universe Online A mysterious infrared glow seen across the entire sky comes from isolated stars beyond the edges of galaxies, according to a new study using data from NASA's Spitzer Space Telescope. The study, published in the journal Nature, suggests that these stars once belonged to the galaxies they edge up to, but were stripped away into the relatively empty space outside during violent galaxy mergers. Astronomers have disagreed for a long time...

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...

Latest Physical cosmology Reference Libraries

2014-01-12 00:00:00

Image Caption: The Hubble Extreme Deep Field (XDF) was completed in September 2012 and shows the farthest galaxies ever photographed by humans. Each speck of light in the photo is an individual galaxy, some of them as old as 13.2 billion years; the observable universe is estimated to contain more than 200 billion galaxies. Credit: NASA/Wikipedia What is Cosmology? I once commented to an acquaintance that I was fascinated by the field of Cosmology, and mused that if I had more time, I...

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...

2010-09-13 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...

2010-09-08 16:02:39

As of 2009, JKCS 041 is a group of galaxies with the distinction of being the farthest away group from Earth ever observed. Seen at redshift 1.9, it is estimated to be 10.2 billion light years away. The cluster is located within the constellation Cetus at a photometrically determined redshift of z=1.9 at right ascension 2h 26m 44s declination -04° 41"² 37"³ (J2000.0).

2014-01-12 00:00:00

Sample Entry: Astronomy is the scientific study of stars, planets, comets, galaxies, and other phenomena that occur outside Earth's atmosphere (e.g. cosmic radiation). Astronomy deals with the evolution, physics, chemical makeup, meteorology, and motion of celestial objects, and also the formation of the universe. The word Astronomy comes from the Greek words astron (meaning "star") and nomos (meaning "law"). Astronomy is one of the oldest sciences. Since the dawn of man, people always...

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Word of the Day
  • A small crescent-shaped structure or marking, especially the white area at the base of a fingernail that resembles a half-moon.
This word is a diminutive of the Latin 'luna,' moon.