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Black Hole FAQs are frequently asked questions about black holes (with answers, of course) from the sci.physics Usenet newsgroup. While a black hole itself is tough to see, it makes a big obvious mess of the universe around it. Hubble Space Telescope Black Hole Images include a massive black hole at the center of the merged Centaurus A galaxy (NGC 5128) which is about 10 million light years away from Earth. The black hole is obvious from a huge twisted disk of hot gas that is funneling into it. Black holes emit large quantities of high-energy X-rays. So X-ray observatory satellites are used to study them: NASA's Chandra (launched 1999-07-23) is operated by the Chandra X-ray Center at Harvard University. Chandra black hole images Chandra Black Hole Field Guide Chandra Public Info Center ESA's XMM-Newton (launched 1999-12-10) XMM-Newton "black hole" archive JAXA's Astro-E2 (launched 2005-07-10). AstroWeb is a directory of about 3000 astronomy links, maintained at the University of Strasbourg, in France. If you search "black hole" at AstroWeb (already entered), the results will be a list of almost 200 links. Or enter any other search terms you wish. Virtual Trips to Black Holes & Neutron Stars, from NASA's Goddard Space Flight Center, are descriptions and MPEG computer animations show what it would be like to travel to black holes or neutron stars. Falling Into a Black Hole provides GIF animations of what it would actually look like to fall into a black hole. Geometry Around Black Holes is a "WWW Visualization Exhibition" displaying and describing mathematically the gravitationally distorted geometry around black holes. Google Usenet Newsgroups sci.astro (8 groups) sci.physics (9 groups) sci.space (7 groups) sci.space.news gov.us.fed.nasa.announce Black Hole Search: The DMOZ Open Directory searches for keywords in website titles and descriptions (not page content). You can limit your search to the Galaxies, Stars, Astrophysics, or Cosmology links category, or search all astronomy or science links.
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 A twisted disk of hot gas funneling into the massive black hole at the center of the Centaurus A galaxy.
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