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Latest Galaxies Stories

Astronomers Rethink Black Hole Growth Rate
2013-02-12 18:38:49

Lee Rannals for redOrbit.com — Your Universe Online The rapidly expanding problem of obesity doesn't seem to just be limited to here on Earth, because new research published in the Astrophysical Journal suggests black holes are growing at larger rates than what had previously been thought possible Most galaxies have black holes at the center of them that can weigh anywhere from one million to one billion times as much as the Sun. The black hole found in the middle of our Milky...

Weighing In On Supermassive Black Holes
2013-01-31 20:08:54

John P. Millis, Ph.D. for redOrbit.com — Your Universe Online Black holes of any size are mysterious, seemingly breaking through the barriers of the physical laws that guide our Universe. Formed under extreme conditions -- such as the collapse of a massive star, some ten times the mass of our Sun or more -- these objects are very difficult to study under any conditions. Most puzzling are a class of black holes that can range in size from millions to billions of solar masses. Such...

Facts About Black Holes Podcast
2013-01-28 09:23:01

John P. Millis, Ph.D. for redOrbit.com — Your Universe Online Click here to stream "Facts About Black Holes — Separating Myth From Reality" (Or right-click on the above link to download the file to your computer) When most people think of a black hole, they tend to envision it as sort of cosmic vacuum cleaner, slowly sucking in and devouring everything in its vicinity. But are black holes really like this? And what would happen if you fell into a black hole? What about a...

How Stars Die And Black Holes Form: Your Universe Today Podcasts
2013-01-23 12:17:54

John P. Millis, Ph.D. for redOrbit.com — Your Universe Online Click here to stream "How Stars Die And Black Holes Form": Your Universe Today Podcasts (Or right-click on the above link to download the file to your computer) Black holes are among the most exotic, mysterious and perplexing objects in the Universe. They are swallowers of light, destroyers of stars and the engines that drive our galaxies. Some believe they could even hold the key to interstellar travel and may perhaps...

How Big Can Black Holes Get?
2012-12-19 07:56:28

Lee Rannals for redOrbit.com - Your Universe Online According to a study using data from NASA's Chandra X-ray Observatory, there may be more ultramassive black holes in the Universe than previously thought. A new analysis has looked at the brightest galaxies in a sample of 18 galaxy clusters in order to target the largest black holes. The scientists' work suggests that at least ten of the galaxies contain an ultramassive black hole, weighing between 10 and 40 billion times the mass...

All Black Holes Launch Fundamentally Similar High-Speed Jets
2012-12-14 11:31:15

April Flowers for redOrbit.com - Your Universe Online It would be a mistake to think of black holes as having a uniformity of size or mass. They range from modest objects formed from the end of an individual stars' life to behemoths billions of times more massive that rule the centers of galaxies. A new study recently published in the journal Science, however, shows that high-speed jets launched from active black holes share fundamental similarities despite the mass, age or...

Chandra Eyes Most Distant X-ray Jet Ever Observed
2012-11-29 10:00:20

April Flowers for redOrbit.com - Your Universe Online NASA's Chandra X-ray Observatory has detected a jet of X-rays from a supermassive black hole 12.4 billion light years from Earth, making it the most distant X-ray jet ever observed. The jet gives astronomers a glimpse into the explosive activity associated with super massive black hole growth in the early universe. A quasar named GB 1428+4217, or GB 1428 for short, produced the jet of X-rays. The black holes at the center of most...

Massive Black Hole Is A Real Heavyweight
2012-11-29 06:42:37

Lee Rannals for redOrbit.com - Your Universe Online Astronomers have measured the mass of what may be the most massive black hole observed so far by using the Hobby-Eberly Telescope at The University of Texas at Austin's McDonald Observatory. The black hole makes up 14 percent of its galaxy's mass, rather than the usual 0.1 percent, according to the study published in the journal Nature. NGC 1277 is about 220 million light-years away from Earth, and is just ten percent the size and...


Latest Galaxies Reference Libraries

6_8304cd2002012eb0093845e374a1b9612
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
tesla
  • 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.