Latest Galaxies Stories

New Look At Old Galactic Friend
2014-02-07 09:05:06

NASA Just weeks after NASA’s Chandra X-ray Observatory began operations in 1999, the telescope pointed at Centaurus A (Cen A, for short). This galaxy, at a distance of about 12 million light years from Earth, contains a gargantuan jet blasting away from a central supermassive black hole. Since then, Chandra has returned its attention to this galaxy, each time gathering more data. And, like an old family photo that has been digitally restored, new processing techniques are providing...

Radio Telescope Arrays Can Be Used To Locate Cosmic Heating From The Earliest Black Holes
2014-02-06 05:05:02

[ Watch the Video: Black Holes Heated Gas Later Than Believed ] redOrbit Staff & Wire Reports - Your Universe Online In what is being described as a landmark discovery about the origins of the universe, Tel Aviv University researchers report in the journal Nature that black holes, formed from the first-ever stars, heated the gas throughout space much later than previously believed. In addition, study authors Professor Rennan Barkana of TAU's School of Physics and Astronomy, Dr....

Early Galaxies Formed By Collisions
2014-01-29 14:23:23

Lee Rannals for redOrbit.com - Your Universe Online Astronomers writing in the Astrophysical Journal say that massive galaxies in the early universe were formed through collisions. Scientists studied galaxies that existed when the universe was just between 1 and 2 billion years old. The smallest of these galaxies contain a few million stars, while the largest can contain several hundred billion stars. The first stars in the universe showed up about 200 million years after the Big...

Active Supermassive Black Holes Discovered In Two Merging Galaxies
2014-01-28 13:17:31

[ Watch the Video: Galaxy Mergers And Supermassive Black Holes ] Lee Rannals for redOrbit.com - Your Universe Online Astronomers publishing a paper in the Astrophysical Journal say they have found two merging galaxies have active supermassive black holes. The team conducted infrared observations of the merging galaxies by using the Subaru Telescope. They found that at least one of the supermassive black holes almost always becomes active and luminous by accreting a large amount of...

ultramassive black hole
2014-01-24 04:20:25

redOrbit Staff & Wire Reports - Your Universe Online Using NASA’s Chandra X-ray Observatory and a host of other telescopes, astronomers have managed to locate one of the most powerful black holes ever discovered – a gravity-intense region of space that is located nearly four billion light years from Earth and has prevented trillions of stars from forming. This black hole, which is located in a galaxy cluster known as RX J1532.9+3021 (or RX J1532 for short), has created gigantic...

Be Star Black Hole
2014-01-17 08:27:04

[ Watch the Video: Turn About Is Fair Play - Black Hole Caught Orbiting A Star ] John P. Millis, PhD for redOrbit.com - Your Universe Online Black holes, by their very definition, are difficult to find. Their density is so great, that light cannot be given off directly, and photons that stray too close are absorbed into the gravitational well. So researchers have to rely on indirect evidence that a black hole is present by searching for their effects on other nearby objects....

Dead Star, Black Holes Highlighted In Dazzling NASA NuSTAR Imagery
2014-01-10 10:11:37

Gerard LeBlond for redorbit.com - Your Universe Online A pair of dazzling images from NASA’s Nuclear Spectroscopic Telescope Array (NuSTAR) highlights the observatory's impressive imaging capabilities for objects both near and far. The first image (featured above) is of the energized remains of a dead star, labeled the “Hand of God” for its formation resembling that of a hand. the second image (see below) is of distant black holes surrounded by a cloud of dust. NuSTAR’s...

Hypervelocity Stars Escape Galaxy
2014-01-10 08:44:12

April Flowers for redOrbit.com - Your Universe Online A surprising new class of hypervelocity stars has been discovered by an international team of astronomers. These solitary stars are moving fast enough to escape the gravitational grasp of the Milky Way galaxy, according to a study presented at the annual meeting of the American Astronomical Society. The findings were also published in the Astrophysical Journal. "These new hypervelocity stars are very different from the ones that...

Swift Sees X-ray Action In Milky Way's Center
2014-01-09 06:14:19

[ Watch the Video: Swift Sees Changes in the Milky Way 2006 – 2013 ] Lee Rannals for redOrbit.com - Your Universe Online Scientists have discovered a rare celestial entity that could help test predictions of Albert Einstein’s theory of general relativity. A team at the annual meeting of the American Astronomical Society in National Harbor, Maryland, explained how images obtained through NASA’s Swift spacecraft could help decipher the physical nature of X-ray flares and enable...

Abell 1795
2014-01-09 04:13:33

[ Watch the Video: A Tour of Galaxy Cluster Abell 1795 ] Lee Rannals for redOrbit.com - Your Universe Online NASA’s Chandra X-ray Observatory has helped astronomers witness the first event of a black hole destroying a star in a dwarf galaxy. Two independent studies using data from Chandra and other telescopes have led scientists to believe they have found what appears to be a star being consumed by a black hole. “We can’t see the star being torn apart by the black hole,”...

Latest Galaxies Reference Libraries

2004-10-19 04:45:42

Supermassive Black Hole -- A Supermassive black hole is a black hole with a mass in the range of millions or billions solar masses. A supermassive black hole has some interesting properties differing from his low-mass cousins: -- The average density of a supermassive black hole can be very low, and actually can be lower than water's density. This happens because the black hole diameter increases linearly with mass, and consequently density drops much faster. -- Strong tidal...

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Word of the Day
  • In the phrase to out-herod Herod, to be more violent than Herod (as represented in the old mystery plays); hence, to exceed in any excess of evil.
Herod refers to 'Herod the Great,' a Roman client king and 'a madman who murdered his own family and a great many rabbis.' According to the OED, the term is 'chiefly with allusion to Shakespeare's use' in Hamlet.