Quantcast

Latest Physical cosmology Stories

Most Distant Source Of High-Energy Gamma Rays Comes From Distant Blazar
2013-04-19 04:57:41

April Flowers for redOrbit.com - Your Universe Online Of all the active galactic nuclei, blazars are the brightest and emit very high-energy gamma rays. A team led by physicists from the University of California, Santa Cruz (UCSC), has made new observations of the blazar known as PKS 1424+240 that reveal it is the most distant known source of very high-energy gamma rays. The emission spectrum of PKS 1424+240 now appears highly unusual in the light of new data. Data from the Hubble Space...

Stephen Hawking Touches On God And Dark Matter At Caltech Speech
2013-04-18 11:09:45

Brett Smith for redOrbit.com - Your Universe Online Although he probably never expected a career in physics would warrant it, Stephen Hawking received a ℠rock star´ reception to his speaking engagement at the California Institute of Technology (Caltech) in Pasadena, California on Tuesday. The 71-year-old scientist covered a wide range of topics during his speech, from the past and future of astrophysics to the existence of God. “It has been a glorious time to be alive and doing...

Young Universe Was A Massive Factory For Star Formation
2013-04-17 13:36:09

Lee Rannals for redOrbit.com — Your Universe Online Astronomers say they have discovered a star factory in a galaxy so distant that they see it when the Universe was only six percent of its current age of about 13.7 billion years old. The team wrote in the journal Nature that HFLS3 sits at about 12.8 billion light-years from Earth. They said the distant galaxy is producing about 3,000 Suns per year, which is more than 2,000 times that of our own Milky Way galaxy. "This is the...

Big Bang In High Fidelity Sound
2013-04-10 10:53:15

[ Watch the Video: The Sounds of the Big Bang in High Fidelity ] April Flowers for redOrbit.com - Your Universe Online "If the Universe started with a bang, and no one was alive yet to observe it, would it still make a sound?" It sounds like the start of a really cliché joke, but the answer, surprisingly, is yes. Scientists believe the expanding early Universe produced waves of sound that echoed through the dense plasma and hydrogen that filled it at the time....

Scientists Discover The Earliest Known Starburst Galaxies In The Universe
2013-04-05 15:32:28

Brett Smith for redOrbit.com - Your Universe Online An international team of researchers announced it has found some of the Universe´s earliest starburst galaxies, essentially young energetic clusters of cosmic gas and dust that form stars at an alarming rate. The discoveries, which were detailed in reports published in Nature and the Astrophysical Journal, were made using the newly inaugurated Atacama Large Millimeter/submillimeter Array (ALMA) telescope. In its first billions...

Hubble Space Telescope Breaks Record For Furthest Supernova
2013-04-04 12:49:29

ESA/Hubble The NASA/ESA Hubble Space Telescope has broken the record in the quest to find the furthest supernova of the type used to measure cosmic distances. This supernova exploded more than 10 billion years ago (redshift 1.914), at a time the Universe was in its early formative years and stars were being born at a rapid rate. The supernova, designated SN UDS10Wil, belongs to a special class of exploding stars known as Type Ia supernovae. These bright beacons are prized by astronomers...

Evidence That Dark Matter Is Real
2013-04-04 05:36:28

[ Watch the Video: AMS Time Lapse Installation ] John P. Millis, Ph.D. for redOrbit.com — Your Universe Online For decades scientists have wondered whether a mysterious form of matter — known simply as Dark Matter since it does not interact directly with light — makes up the majority of the “stuff” in the Universe. Researchers have pointed to the seminal work on the Bullet Cluster of galaxies as evidence that dark matter is a real substance. But similar...

Probes Of Dark Matter On Galaxy Scales 2013
2013-04-03 19:01:07

Lee Rannals for redOrbit.com — Your Universe Online Scientists are coming together this summer to try and collaborate on solving the mystery of dark matter. Probes of Dark Matter on Galaxy Scales 2013, will be held July 14—19 in Monterey, California. Scientists at the conference will be meeting to discuss their techniques for solving the secrets of dark matter in the universe. “The idea is to bring together people working on different probes of dark matter from...

Green Pea Galaxies Could Offer Astronomers An Understanding Of The Early Universe
2013-04-03 16:49:59

University of Michigan The rare Green Pea galaxies discovered by the general public in 2007 could help confirm astronomers' understanding of reionization, a pivotal stage in the evolution of the early universe, say University of Michigan researchers. Reionization occurred a few hundred million years after the Big Bang as the first stars were turning on and forming the first galaxies. During this period, the space between the galaxies changed from an opaque, neutral fog to a transparent...


Latest Physical cosmology Reference Libraries

Cosmology
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...

45_d4a20fda769b165e44826492e9e54549
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...

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...

67_4ae26d06e7989cbc4cd9f57abd6295f5
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).

45_b90d45a4e7d89d873d39705549e516ce
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...

More Articles (21 articles) »
Word of the Day
malpais
  • The ragged surface of a lava-flow.
'Malpais' translates from Spanish as 'bad land.'