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| Titel | Newborn Black Holes |
|---|---|
| Quelle | In: Science Teacher, 72 (2005) 7, S.12 (1 Seiten) |
| Sprache | englisch |
| Dokumenttyp | gedruckt; Zeitschriftenaufsatz |
| ISSN | 0036-8555 |
| Schlagwörter | Satellites (Aerospace); Space Exploration; Astronomy; Scientists; Theories; Radiation |
| Abstract | Scientists using NASA's Swift satellite say they have found newborn black holes, just seconds old, in a confused state of existence. The holes are consuming material falling into them while somehow propelling other material away at great speeds. "First comes a blast of gamma rays followed by intense pulses of x-rays. The energies involved are much greater than anyone expected," says David Burrows of Pennsylvania State University (Penn State). These gamma-ray bursts are the most powerful explosions known. They are forerunners of a massive star explosion called a hypernova, which is bigger than a supernova. Using Swift, scientists are finally able to see gamma-ray bursts within minutes after the trigger, instead of hours or days, and are privy to newborn black hole activity. Until this latest discovery, scientists assumed a simple scenario of a single explosion followed by a graceful afterglow of the dying embers. Several theories exist to describe this newly discovered phenomenon and most point to the presence of a newborn black hole. (ERIC). |
| Anmerkungen | National Science Teachers Association, 1840 Wilson Boulevard, Arlington, VA 22201-3000. Tel: 800-722-6782 (Toll Free); Web site: http://www.nsta.org. |
| Erfasst von | ERIC (Education Resources Information Center), Washington, DC |
| Update | 2017/4/10 |
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