Go to Catalogue of the Cosmos Flash required Catalogue of the Cosmos Gamma-ray bursts, the spectacular celestial explosions seen in NOVA's "Death Star," are just one of myriad marvels in outer space. In this feature, learn the difference between pulsars and quasars, antimatter and dark matter, brown dwarfs and white dwarfs, and many other extraterrestrial wonders. Catalogue of the Cosmos (233K) Requires Flash Catalogue of the Cosmos (non-Flash version) Flash is a plug-in that allows for increased interactivity. If you can see the animated boxes at left, the plugin is already installed. If you do not see the boxes, you can install the Flash plugin, or select this feature's non-Flash version. Glossary excerpted with permission from Cosmic Horizons: Astronomy at the Cutting Edge, edited by Steven Soter and Neil deGrasse Tyson, New York: The New Press, 2001. Definition of gamma-ray burst courtesy of Dr. Jerry Bonnell, Goddard Space Flight Center. Photo credits Printer-Friendly Format   Feedback One Astronomer's Universe | A Bad Day in the Milky Way Catalogue of the Cosmos | Tour the Spectrum Resources | Transcript | Site Map | Death Star Home Search | Site Map | Previously Featured | Schedule | Feedback | Teachers | Shop Join Us/E-Mail | About NOVA | Editor's Picks | Watch NOVAs online | To print PBS Online | NOVA Online | WGBH © | Updated January 2002