Massive Black Holes May Be Able To Halt New Star Formation

Massive Black Holes May Be Able To Halt New Star Formation

April Flowers for redOrbit.com - Your Universe Online A new study has found that massive black holes which emit radio-frequency-emitting particles at near-light speed may possibly be able to block the formation of new stars in older galaxies....

Latest Astrophysics Stories

2014-10-17 08:22:13

REDONDO BEACH, Calif., Oct. 17, 2014 /PRNewswire/ -- The purchase agreement puts Surfx in an excellent position to grow its business. The company has been in operation since 1999 and is a leading manufacturer of atmospheric pressure plasmas in the aerospace, medical device, biotech, and electronics industries. Existing customers for Surfx's Atomflo(TM) atmospheric plasma systems include many Fortune 500 companies who rely on these tools for their precision manufacturing processes....

big bang universe
2014-10-11 06:14:12

Chuck Bednar for redOrbit.com - Your Universe Online By measuring the radiation leaks in a large, densely-packed star-forming galaxy, astronomers have been able to learn more about how the universe evolved as the first stars were formed, according to research published online Thursday in the journal Science. Lead author Sanchayeeta Borthakur, an assistant research scientist at Johns Hopkins University, and her colleagues reported how they used a method of analyzing star-forming galaxies...

nova explosion
2014-10-09 06:38:55

Chuck Bednar for redOrbit.com - Your Universe Online Extremely detailed images produced using radio telescopes spread throughout Europe and the US have allowed researchers to pinpoint the exact locations in a stellar explosion where gamma rays are emitted. Gamma-ray emissions were first observed by NASA’s Fermi Gamma-Ray Telescope in 2012 and are the highest-energy form of radioactive waves in the known universe. However, according to Michigan State University, how they are produced...

2014-10-04 03:00:36

Karen C. Fox, NASA's Goddard Space Flight Center The sun emitted a mid-level solar flare, peaking at 3:01 p.m. EDT on Oct. 2, 2014.  NASA's Solar Dynamics Observatory, which watches the sun 24-hours a day, captured images of the flare. Solar flares are powerful bursts of radiation. Harmful radiation from a flare cannot pass through Earth's atmosphere to physically affect humans on the ground, however -- when intense enough -- they can disturb the atmosphere in the layer where GPS and...

cosmic rays
2014-10-04 05:22:11

April Flowers for redOrbit.com - Your Universe Online We use our smartphones for a myriad of things, from normal phone activities to finding constellations in the night’s sky. And soon, your smartphone could be used to detect cosmic rays, much like the high-end, multimillion-dollar observatories. [ Listen to the Podcast: Hunting For Cosmic Rays – With Special Guest Dr. Stephan Funk ] The app — which is only available for Android phone so far, but should be coming to other...

flare up
2014-10-03 04:00:06

Steele Hill, NASA's Goddard Space Flight Center A snaking, extended filament of solar material currently lies on the front of the sun -- some 1 million miles across from end to end. Filaments are clouds of solar material suspended above the sun by powerful magnetic forces. Though notoriously unstable, filaments can last for days or even weeks. NASA's Solar Dynamics Observatory, or SDO, which watches the sun 24 hours a day, has observed this gigantic filament for several days as it...

red dwarf superflare
2014-10-01 04:38:31

April Flowers for redOrbit.com - Your Universe Online The strongest, hottest and longest-lasting sequence of stellar flares ever seen from a nearby red dwarf star was detected by NASA's Swift satellite on April 23. The first salvo from this record-setting series of flares was easily 10,000 times more powerful than the largest solar flare ever recorded from our own Sun. "We used to think major flaring episodes from red dwarfs lasted no more than a day, but Swift detected at least seven...

interior of a supermassive star
2014-09-30 10:24:04

Linda Vu, Berkeley Lab Computing Sciences Findings made possible with NERSC resources and Berkeley Lab Code Certain primordial stars—those between 55,000 and 56,000 times the mass of our Sun, or solar masses—may have died unusually. In death, these objects—among the Universe’s first-generation of stars—would have exploded as supernovae and burned completely, leaving no remnant black hole behind. Astrophysicists at the University of California, Santa Cruz (UCSC) and the...

solar flare
2014-09-29 10:53:12

Karen C. Fox, NASA's Goddard Space Flight Center The sun emitted a mid-level solar flare, peaking at 10:58 p.m. EDT on Sept. 27, 2014, and NASA's Solar Dynamics Observatory captured images of the event. Solar flares are powerful bursts of radiation from the sun. Harmful radiation from a flare cannot pass through Earth's atmosphere to physically affect humans on the ground, however -- when intense enough -- they can disturb the atmosphere in the layer where GPS and communications signals...

coronal mass ejection
2014-09-26 03:00:31

Karen C. Fox, NASA's Goddard Space Flight Center Two main types of explosions occur on the sun: solar flares and coronal mass ejections. Unlike the energy and x-rays produced in a solar flare – which can reach Earth at the speed of light in eight minutes – coronal mass ejections are giant clouds of solar material that take one to three days to reach Earth. Once at Earth, these ejections, also called CMEs, can impact satellites in space or interfere with radio communications. During CME...

Latest Astrophysics Reference Libraries

Stellar Astrophysics
2014-01-12 00:00:00

The prominent feature that allows for the existence of life on Earth is the Sun. Radiation from our closest star provides heat and energy to our planet, driving biological processes and providing the necessary conditions for liquid water to naturally exist. But our Sun is only but one star in this vast Universe. And as it turns out, most stars are quite different than the one that illuminates our day. For this reason, scientists have, for hundreds of years, attempted to study the other...

2014-01-12 00:00:00

Image Caption: NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 56,000 light-years in diameter and approximately 60 million light-years distant. Credit: NASA/ESA/Wikipedia What is Astrophysics? For much of the modern age the term Astrophysics has been used synonymously with Astronomy. This interchange is so common that many textbooks even offer the two as having the same meaning. However, from a strictly historical perspective there are differences...

How Solar Cycles Impact Our Weather Here On Earth
2013-01-13 09:10:34

Solar cycles: what are they and why should we care about them? Solar cycles are made up of what are known as solar minimums (min) and solar maximums (max). We refer to a solar min at the time when the sun is not active with many sunspots, while a solar max is just the opposite when we see a large increase in sunspot activity. So how long do solar cycles last? Typically they run on what is known as an 11 year cycle from the max to the min and then start over again anew. As of 2012 we...

2014-01-12 00:00:00

Physics is a natural science involving the study of matter and its motion through space-time, along with related concepts such as energy and force. On a broader scale, it also involves the general analysis of nature, conducted in order to understand how the universe behaves. Physics is one of the oldest academic disciplines, perhaps the oldest through its inclusion of astronomy. Physics was part of natural philosophy until the Scientific Revolution in the 16th century, when the natural...

Astronomy and Astrophysics Review
2012-04-25 09:55:47

The Astronomy and Astrophysics Review is a peer-reviewed scientific journal published quarterly by Springer Science Business Media. The editor-in-chief is Thierry Courvoisier. It was first published in April 1989. The journal covers all areas of astronomy and astrophysics, including cosmic ray physics, studies in the solar system, astrobiology, developments in laboratory or particle physics relevant to astronomy, instrumentation, computational or statistical methods with specific...

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Word of the Day
  • A unit of saved energy.
Coined by Amory Lovins, chairman of the Rocky Mountain Institute as a contraction of negative watt on the model of similar compounds like megawatt.