Latest Galaxies Stories

Black Hole Blows Powerful Streams
2013-09-06 08:51:29

April Flowers for redOrbit.com - Your Universe Online A worldwide network of radio telescopes has allowed astronomers to find strong evidence that a powerful jet of material, propelled to nearly light speed by the central black hole of a galaxy, is blowing massive amounts of gas out of the host galaxy. The scientists say the process is limiting the growth of the black hole and the rate of star formation in the galaxy. That makes the process a key to understanding how galaxies develop....

Black Holes Shine For NuSTAR
2013-09-06 06:38:46

[ Listen to the Podcast: Supermassive Black Holes – With Guest Dr. Kelly Holley-Bockelmann ] April Flowers for redOrbit.com - Your Universe Online The Nuclear Spectroscopic Telescope Array (NuSTAR) spacecraft, NASA’s black-hole-hunter, had identified its first 10 supermassive black holes. Over the next two years, the NuSTAR team expects to find hundreds of black holes. Supermassive black holes – which are black holes surrounded by thick disks of gas – are gargantuan...

Researchers Explain Why Supermassive Black Holes Eat Less Material Than Expected
2013-08-30 08:51:11

[ Watch the Video: Black Hole On A Diet ] April Flowers for redOrbit.com - Your Universe Online A long-standing mystery concerning supermassive black holes (SMBH) at the center of galaxies has been solved by a team of astronomers using NASA’s super-sensitive Chandra X-ray Space Telescope. The team, led by Q. Daniel Wang at the University of Massachusetts Amherst, investigated why these SMBHs have such a low accretion rate, or rather, why they swallow very little of the cosmic gases...

Space Slinky Video Compiled From Hubble Images
2013-08-23 04:04:14

[ Watch the Video: Hubble Takes Movies of Space Slinky ] redOrbit Staff & Wire Reports - Your Universe Online Astronomers are hoping to gain new insight in the role that black holes play in galaxy evolution thanks to a new series of time-lapse movies compiled from over a decade’s worth of observations from NASA’s Hubble Space Telescope. The video footage shows what experts have dubbed a “space slinky” – a 5,000 light-year-long jet of superheated gas being ejected from a...

Cosmic Turbulence Black Hole Formation
2013-08-16 09:31:01

John P. Millis, PhD for redOrbit.com - Your Universe Online The mechanism by which stars and black holes are formed in extreme cases of high mass density has puzzled astronomers since Johannes Kepler first laid out his laws of planetary motion some 400 years ago. In the most basic sense, a large cloud of gas condenses into a rotating disk. Mass is then directed towards the center of the cloud where, due to the increasing density, a stellar body is eventually formed. One challenge to...

Highly Magnetized Pulsar At Galactic Center
2013-08-14 12:20:25

John P. Millis, PhD for redOrbit.com - Your Universe Online At the center of the Milky Way lurks a supermassive black hole known as Sagittarius A*, with some four million times the mass of our Sun. More than any single object, it has the greatest impact on the formation, evolution and fate of our galaxy. However, probing this massive object is difficult. Due to the nature of black holes, most of what we learn about their existence is derived by observing their influence on other nearby...

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...

Unraveling Galactic History Begins With A Black Hole's Spin
2013-07-30 14:11:38

Brett Smith for redOrbit.com - Your Universe Online A supermassive black hole is believed to sit at the center of each large galaxy, and a new technique designed to detect the dark abyss' spin could be the key to unraveling a galaxy's history. While black holes cannot be seen directly, their behavior can be determined by looking at how they affect nearby objects. A paper published in Monthly Notices of the Royal Astronomical Society describes a new technique that was developed by...

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
  • The unit of magnetic flux density in the International System of Units, equal to the magnitude of the magnetic field vector necessary to produce a force of one newton on a charge of one coulomb moving perpendicular to the direction of the magnetic field vector with a velocity of one meter per second. It is equivalent to one weber per square meter.
This word is named for Nikola Tesla, the inventor, engineer, and futurist.