June 16, 2002 go Advanced Search TODAY'S NEWS EXPLORE ASK THE EXPERTS QUICK POLL FEATURE ARTICLES EXHIBITS INTERVIEWS TECHBIZ NANOTECHNOLOGY CURRENT ISSUE UPCOMING ISSUE PAST ISSUES EXPLORE Browse: 1996 1997 1998 1999 2000 2001 2002 Secrets of the Stradivarius: An Interview with Joseph Nagyvary June 10, 2002 Sci/Tech Web Awards 2002 June 03, 2002 Lost in Space May 27, 2002 Problems with the ...
Skip navigation and go to page content HEASARC Archive Interfaces Archive Interfaces Argus: proposal info Astrobrowse: worldwide catalog search Browse: search HEASARC archives SkyMorph: search variable objects SkyView: virtual observatory HEASARC Resources/Education Resources/Education Contact Info APOD: Astronomy Picture of the Day Ask an Astronomer Bibliography Deadlines (proposals & meeting ...
Blackholes Discussion Forum ...
About RXTE | About X-ray Astronomy | RXTE Discoveries | Images and Movies | | Education | Tour the ASM Sky | Other Resources | What's New | The RXTE Learning Center is a service of the Laboratory for High Energy Astrophysics (LHEA) at NASA/GSFC. Meet the RXTE Learning Center Team!     What is the 'R' in RXTE Any suggestions, ideas, and lesson plan contributions may be directed to Dr.
Home Latest SNe Observations Statistics SNe Atlas Contributions Programs Charts Library Software Meet us ISN Friends Join us Links Hosted by Since March 1996. International Supernovae Network Welcome to the International Supernovae Network (I.S.N.) web pages. The Network has the purpose to help contacts and share information among supernovae enthusiasts both amateurs and astronomers worldwide.
The planetary nebula M57 (NGC 6720), or the Ring Nebula as it is most commonly referred to for obvious reasons, lies about 1600 light years away from the Earth. The name "planetary nebula" given to this class of objects is due to the fact that many of them appear disc-like, similar to how the planets in our Solar System appear when viewed through a telescope. In reality, planetary nebulae are stars at the point of death.
Expo/Science & Industry/Spacetime Wrinkles SPACETIME WRINKLES In 1905, Albert Einstein published his famous Special Theory of Relativity and overthrew commonsense assumptions about space and time. Relative to the observer, both are altered near the speed of light: distances appear to stretch; clocks tick more slowly. A decade and a year later, Einstein further challenged conventional wisdom by ...
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.
This is Dave Green's Galactic supernova remnant catalogue, or catalog of SNRs, updated 2001 December, containing 231 supernova remnants ...
Explores X-ray astronomy, supernovae, and their remnants.
The AFOE: A Spectrograph for Precise Stellar Radial Velocity Measurements Detection of a high-eccentricity low-mass companion to HD 89744 The Instrument The Advanced Fiber-Optic Echelle (AFOE) spectrometer is a fiber-fed, bench-mounted echelle spectrograph, located at the 1.5m (60 ) telescope of the Whipple Observatory, near Tucson, Arizona. A spectrograph is an instrument that spreads out light ...
A summary of the 'sky' page set.
Robert C. Duncan, University of Texas at Austin.
ECLIPSING BINARY STARS What are Binary Stars Most stars are found in groups of stars that are gravitationally bound with each other. The majority of these stars are found in binary systems which are systems of two stars in orbit around a common center of mass. One can classify binary stars based on their appearance from earth. Stars that are far enough apart to be distinguished from each other ...
Frequently Asked Questions About Quasars Compiled by Dr. John Simonetti of the Department of Physics at Virginia Tech. Back to Frequently Asked Astronomy and Physics Questions What is your definition of a quasar W, 8th grade, Blacksburg Middle School, Blacksburg, Virginia, USA. 1996 What do quasars have to do with black holes W, 8th grade, Blacksburg Middle School, Blacksburg, Virginia, USA.
Black Holes, White Holes, Worm Holes How can black holes ever capture anything since 2-body capture is dynamically forbidden Can nuclear fusion happen near a black hole How do astronomers really prove that black holes exist when they are just theoretical ideas Can a star clog a black hole that is swallowing it What is a Naked Singularity Could gamma ray bursts (GRBs) be white holes What is ...
RX J1856.5-3754 and 3C58: Cosmic X-rays May Reveal New Form of Matter RX J1856.5-3754 Credit: NASA/SAO/CXC/J.Drake et al. JPEG (140 k) , Tiff (880 k), PS (6.5 MB) 3C58 Credit: NASA/SAO/CXC/P.Slane et al. JPEG (164 k) , Tiff (2.2 MB), PS (6.4 MB) Chandra observations of RX J1856.5-3754 and the pulsar in 3C58 suggest that the matter in these collapsed stars is even denser than nuclear matter, the ...
Main Page Black Hole Formation Black Hole Detection Event Horizon Primordial Black Holes Quasars Hawking Radiation The Information Paradox Frame Dragging Likely Black Hole Candidates Our Attempts To Contact Stephen Hawking Glossary References Used About the Authors Welcome to the Naked Singularity. This site was created by Mark O'Brien and John Chang for their end-of-the-year physics project ...
This is a republication from the Annual Review of Astronomy and Astrophysics, 1992.
An educational black hole web site from NASA.
An educational introduction to gravitational lensing.
NASA Science News: Scientists thought they understood supernovae - the death throes of huge, exploding stars. However, a new kind of supernova, far too bright to be an ordinary supernova confounds current theories, and may be the explanation for gamma-ray bursts.
Chandra Associates Pulsar and Historic Supernova January 10, 2001 CXC PR: 01-02 Dolores Beasley NASA HQ Phone: 202-358-1753 Steve Roy Marshall Space Flight Center, Huntsville, AL Phone: 256-544-6535 Megan Watzke Chandra X-ray Observatory Center, CFA, Cambridge, MA Phone: 617-496-7998 email@example.com Press Image and Caption SAN DIEGO -- Scientists using NASA s Chandra X-ray Observatory ...
Simulation of a Black Hole by Raytracing This information has also been published in Relativity and Scientific Computing :... F.W.Hehl, R.A.Puntigam, H.Ruder (Eds.) Relativity and Scientific Computing Computer Algebra, Numerics, Visualization ISBN 3-540-60361-1 Springer Verlag Berlin Heidelberg New York Newtonian Simulation (186KB) Einsteinian Simulation (227KB) Both images show a complex ...
A comprehensive, categorized list of supernova and supernova remnant web pages and resources.
Updated: 24-JAN-1993 by SIC original by Scott I. Chase Olbers' Paradox Why isn't the night sky as uniformly bright as the surface of the Sun If the Universe has infinitely many stars, then it should be. After all, if you move the Sun twice as far away from us, we will intercept one-fourth as many photons, but the Sun will subtend one-fourth of the angular area. So the areal intensity remains ...
Olbers's Paradox (for a similar picture for galaxies) There is a simple, seemingly trivial question one can ask -- Why is the night sky dark This question was originally posed many years ago by a series of people (Kepler, Halley === ...
The basic question posed by Olbers.
Return to my Astronomy/Space pages Go to my home page Olbers' Paradox Copyright 1997, Jim Loy How much light do we get from the stars Let's assume that the stars are more or less evenly distributed throughout space. Now, let's draw a sphere around us: The number of stars in the sphere is roughly proportional to the volume of the sphere. A fairly simple integral (which I won't bother to ...
Stellar Spectra across Draper (G, K, M, S, and C) and Luminosity Classes, Philip C. Keenan and Raymond C. McNeil: Ohio State University Press, Canonical Education Consultants
A supernovae classification scheme.