Imagine Home  |   Teachers' Corner   |   Current page This has profound consequences: 1. Without its virtual partner, the escaping particle becomes a real particle and appears to us on Earth (watching it happen) to be radiation coming "from the black hole". This is called Hawking Radiation, and actually radiates from just outside the event horizon. 2. The particle with negative energy that was captured by the black hole will reduce the mass of the singularity. If this happens enough for a long enough period of time, the black hole will simply "evaporate" away. Inevitable Mathematics A. Take any number, Multiply it by 12: Add 40 to the result: Divide by 4: Subtract three times the original number. B. 1 C. With this procedure, this number will fall into a cyclic 'black hole' like 81. D. Again, by following through with this procedure, this number will fall into a cyclic 'black hole' like 81.   An artist's rendition of a supermassive black hole surrounded by a large galaxy of stars, gas, and dust, blasting powerful jets out into space serves as the background for our poster. This image was produced by the Joan Carol Design and Exhibit Group of Clinton, Maryland. The Visible/UV image is from a Hubble Space Telescope observation of NGC 4261. The image is courtesy of H. Ford and L. Ferrarese (Johns Hopkins), W. Jaffe (Leiden), and NASA. The radio image is of the nearby active galaxy Cygnus A. This image has been used with permission from National Radio Astronomy Observatory /AUI. The X-ray spectrum is from an ASCA observation of the active galaxy MCG-6-30-15. This figure is from a paper entitled "Gravitationally Redshifted emission Implying an Accretion Disk and Massive Black Hole in the Active Galaxy MCG:-6-30-15" by Y. Tanaka et al., published in Nature, Volume 375, p. 659, 1995. The X-ray image is from a Roentgen Satellite observation of the active galaxy NGC 1275 at the center of the Perseus cluster of galaxies. The contour lines show the radio structure as given by VLA observations. The image is courtesy of the Max Planck Institute. The X-ray light curve is from a Rossi X-ray Timing Explorer observation of the micro-quasar GRS 1915+105. The figure is from a paper entitled "A Unified Model for the Spectral Variability in GRS 1915+105" by T. Belloni et al ., published in the Astrophysical Journal, Volume 488, p. L109, 1997. The gamma-ray image is from a Compton Gamma-Ray Observatory observation of the quasar 3C279. The image is courtesy of the EGRET team, the Compton Observatory, and NASA. The scales provided on the diagram are typical values for an active galaxy.   Download a pdf version.
 If words seem to be missing from the articles, please read this. Imagine the Universe! is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA's Goddard Space Flight Center. The Imagine Team Project Leader: Dr. Barbara Mattson Curator: Meredith Gibb Responsible NASA Official: Phil Newman All material on this site has been created and updated between 1997-2014. This page last updated: Thursday, 21-Nov-2002 11:20:10 EST Useful plugins Privacy Policy and Important Notices Do you have a question, problem or comment about this web site? Please let us know. External links contain material that we found to be relevant. However they're not maintained by us and the content may have changed. If you find any external links that contain inappropriate material, please let us know!