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Black Holes

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		CRPC Effort toward Black Hole Simulations ^Votes:0 CRPC Effort toward Black Hole Simulations The Northeast Parallel Architectures Center (NPAC) is working with a number of collaborators at seven other institutions on a project to develop numerical codes simulate the 3D spiraling coalescence of two black holes. This is an important problem in relativity and astrophysics, since colliding black holes are among the most promising sources for generating gravitational waves that may be detected by the turn of the century. NPAC's contribution to this collaboration is concerned with the computational aspects of the simulation . A collection of material relevant to the science of Black holes is stored at NCSA . In particular an article describing the collaboration project to simulate the collision of black holes is available. Futher information is Read More Go to Site


		Ask the Space Scientist, - Astronomy FAQ archive of questions and answers by Dr. Odenwald ^Votes:0 Ask the Space Scientist Conducted by Dr. Sten Odenwald (Astronomer) At this NASA website, I can no longer support questions that don't have to do with the Sun, the Earth and their various interactions. But, you may visit the Astronomy Cafe for answers to over 3000 FAQs about the Solar System, Planet-X, Stars, Galaxies, Black Holes, Big Bang Cosmology, Origin of the Universe, General and Special Relativity, Space Travel, Space Physics, Careers in Astronomy, Telescopes and many other topics, too! Read More Go to Site

		Astronomers discover a new class of black holes ^Votes:0 Space Science News home A New Class of Black Holes? Astronomers may have discovered a new type of middle-weight black hole in the centers of some galaxies. FROM A NASA HQ PRESS RELEASE Apr. 13, 1999 : The field of black holes, formerly dominated by heavyweights packing the gravitational punch of a billion Suns and lightweights just a few times heavier than our Sun, now has a new contender -- a just-discovered mysterious class of "middleweight" black holes, weighing in at 100 to 10,000 Suns. Astronomers at NASA and Carnegie Mellon University have independently found evidence for the new type of black holes in spiral-shaped galaxies throughout the Universe. The newfound black holes, formed by an unknown process, are 100 to 10,000 times as massive as the Sun, yet each occupies less space than Read More Go to Site

		Black Hole ^Votes:0 Help/FAQ What's New Site Map NASA Homepage Search HEASARC HEASARC Quick Links HEASARC HOME OBSERVATORIES ARCHIVE CALIBRATION SOFTWARE TOOLS STUDENTS / TEACHERS / PUBLIC IMAGINE THE UNIVERSE! STARCHILD WEBSTARS ASK A SCIENTIST COSMIC DISTANCE SCALE APOD IMAGES & VIDEOS Black Hole It is now believed that at the center of each galaxy there is a super-massive black hole that is millions to billions of times heavier than our sun. The massive black hole captures nearby stars and drags them into a swirling accretion disk. A "torus" in the inner accretion shields the black hole in those systems that are viewed edge on (which is probably the case for our galactic center). In many of these systems (which are called AGN = active galactic nucleus), a jet is ejected perpendicular to the disk and is see Read More Go to Site

		Black Holes ^Votes:0 Black Holes INTRODUCTION BLACK HOLES NEUTRON STARS AND PULSARS HOW THEY FORM HOW WE DETECT THEM BIBLIOGRAPHY Q & A PAGES RELATED LINKS PRINTOUT BOOKS Once a giant star dies and a black hole has formed, all its mass is squeezed into a single point. At this point, both space and time stop. It's very hard for us to imagine a place where mass has no volume and time does not pass, but that's what it is like at the center of a black hole. The point at the center of a black hole is called a singularity . Within a certain distance of the singularity, the gravitational pull is so strong that nothing--not even light--can escape. That distance is called the event horizon . The event horizon is not a physical boundary but the point-of-no-return for anything that crosses it. When people talk about the Read More Go to Site

		Black Holes ^Votes:0 What's New Site Map NASA Homepage Search: HOME Science Special Exhibit Satellites and Data Teachers' Corner Ask an Astrophysicist Dictionary Resources Feedback Black Holes Level 1 topics include: Introduction to Black Holes Journey into a Black Hole! Level 2 topics include: Black Holes: What Are They? If We Can't See Them, How Do We Know They're There? What About All the Wormhole Stuff? Take Me to Level 1 Information Take Me to Level 2 Information Read More Go to Site

		Black Holes ^Votes:0 HOW DO WE SEE BLACK HOLES ? John Blondin Theoretical Astrophysics Department of Physics North Carolina State University Read More Go to Site

		Black Holes and Neutron Stars ^Votes:0 Black Holes and Neutron Stars INTRODUCTION BLACK HOLES NEUTRON STARS AND PULSARS HOW THEY FORM HOW WE DETECT THEM BIBLIOGRAPHY Q & A PAGES RELATED LINKS PRINTOUT BOOKS Many people think black holes continually suck in everything like great big cosmic bathtub drains. And what the heck are neutron stars? Understanding the nature of black holes and neutron stars--how they form, what they're like, and how we know they are there--can lead to a better understanding of how our Universe works. The information in this web site is intended for a non-technical audience. If you are interested in more scientifically complex discussions of black holes and neutron stars (you know, where they use all those great big words ), you gotta look somewhere else. The Q & A section offers slightly more advanced di Read More Go to Site

		Black Holes and Neutron Stars ^Votes:0 Like a giant blackhole, the Blackholes and Neutron Stars Web site is sucking you in. Dare you enter? Read More Go to Site

		Black holes and quantum gravity ^Votes:0 Black Holes and Quantum Gravity Why bother? Black holes arise in general relativity, a classical theory of gravity. However, we need to include quantum effects to understand black holes properly. Roger Penrose and Stephen Hawking showed thirty years ago that, according to general relativity, any object that collapses to form a black hole will go on to collapse to a singularity inside the black hole. This means that there are strong gravitational effects on arbitrarily short distance scales inside a black hole. On short disctance scales, we certainly need to use a quantum theory to describe the collapsing matter. The presence of a singularity in the classical thoery also means that once we go sufficiently far into the black hole, we can no longer predict what will happen. It is hoped that t Read More Go to Site

		DC MetaData for: Gravitating solitons and hairy black holes ^Votes:0 Piotr Bizon Gravitating solitons and hairy black holes Preprint series: ESI preprints MSC : 83C20 Classes of solutions; algebraically special solutions, metrics with symmetries 83C57 Black holes Abstract : A brief review of recent research on soliton and black hole solutions of Einstein's equations with nonlinear field sources is presented and some open questions are pointed out. Keywords: Einstein equations, black hole, soliton solution Read More Go to Site

		Falling into a Black Hole ^Votes:0 Falling Into a Black Hole In which we fall into a black hole on a real free fall orbit. All distortions of images are real, both general relativistic from the gravitational bending of light, and special relativistic from the near light speed orbit. The black hole belongs to a quadruple stellar system, a binary binary. The system is fictional, but plausible. After you are done dying at the central singularity of the black hole, feel free to explore more about the Schwarzschild geometry, about wormholes, about the collapse of a black hole, and about Hawking radiation. © 1997, 1998 Andrew Hamilton . These pages last modified 19 Apr 2001. The URL of this site is http://casa.colorado.edu/~ajsh/schw.shtml . Here's the Movie Index . For what's see site history . Movie preview Approaching the blac Read More Go to Site

		New Observations of Black Holes confirm General Relativity ^Votes:0 Einstein was right...again!!! Satellite observations of Black Holes confirm frame-dragging effect 80 years after prediction November 6, 1997: T he next time you feel like you're barely dragging along, blame relativity. You'll be stretching the point, but it appears that Einstein was right: space and time get pulled out of shape near a rotating body. Einstein predicted the effect, called ``frame dragging,'' 80 years ago. Like many other aspects of Einstein's famous theories of relativity, it's so subtle that no conventional method could measure it. Using recent observations by X-ray astronomy satellites, including NASA's Rossi X-ray Timing Explorer , a team of astronomers is announcing that they see evidence of frame dragging in disks of gas swirling around a black hole. The discovery will Read More Go to Site

		Newton's Apple ^Votes:0 /\/// @import "http://www.tpt.org/includes/ie5mac.css"; /*/ TV Schedules Overview Programs A-Z Search All Shows Digital TV tpt MN tpt Kids tpt Create tpt HD Streaming Video Program Highlights Overview Arts & Literature History & Society News in Depth Science & Technology How To & Self Improvement Support Overview Pledge/Renew - No GIFT Pledge/Renew - With a Gift Ticket Box Office Membership Benefits Donate your Car Join Studio Society Sponsor a Show Give a Gift of Stock Wills & Estate Gifts Be a Volunteer About Overview Press Room Production Services National Productions Minnesota Productions Career Center Tech Zone Directions Contact Us Current FCC Report (PDF) Current Annual Report (PDF) Science Fair Get inspired! Find a great science fair project! Hosts Newton’s Apple hosts tr Read More Go to Site

		The top science news articles from Yahoo! News ^Votes:0 Primary Navigation Home U.S. Business World Entertainment Sports Tech Politics Elections Science Health Most Popular Secondary Navigation Science Video Weather News Space & Astronomy Animals & Pets Dinosaurs & Fossils Biotech Energy Environment Search: All News Yahoo! News Only News Photos Video/Audio Advanced Science News Humpback whale freed off R.I. coast Enlarge Photo AP AP - Mon Nov 19, 10:04 PM ET WESTERLY, R.I. - A juvenile humpback whale that got tangled in fishing gear and had been stranded off the Rhode Island coast over the weekend freed itself and swam off Monday as rescuers sought to aid it. Video: Rescuers Free Trapped Whale WBZ Boston Full Coverage: Whales and Dolphins Japan fleet sets off to hunt humpbacks AP - Mon Nov 19, 10:04 PM ET EPA considering bans on 2 animal poison Read More Go to Site

		Virtual Trips to Black Holes and Neutron Stars Page ^Votes:0 Virtual Trips to Black Holes and Neutron Stars Page Virtual Trips to Black Holes and Neutron Stars by Robert Nemiroff ( Michigan Technological University ) Ever wonder what it would look like to travel to a black hole? A neutron star? If so, you might find this page interesting. Here you will find descriptions and MPEG movies that take you on such exciting trips. These movies are scientifically accurate computer animations made with strict adherence to Einstein's General Theory of Relativity. The descriptions are written to be understandable on a variety of levels - from the casually curious to the professionally inquisitive. It is hoped that students from grade school to graduate school will find these virtual trips educational. "A stimulating, relativistically accurate trip!" - Kip Thorn Read More Go to Site

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