EVENTS For information on JPL tours and the speakers bureau, visit our PUBLIC SERVICES site. The Solar System Ambassador Program sponsors events in communities around the country. Find out how to become a volunteer Solar System Ambassador.		Topic - Black Holes Black Holes in the Universe Curt Cutler Senior Research Scientist at JPL RealPlayer (with caption): "Black Holes" Archived Webcast RealPlayer (w/out caption): "Black Holes" Archived Webcast If you don't have RealPlayer, you can download the free RealPlayer 8 Basic.   Thursday, November 16 The von Kármán Auditorium at JPL 4800 Oak Grove Drive Pasadena, CA For directions, click here. Friday, November 17 The Vosloh Forum at Pasadena City College 1570 East Colorado Blvd. Pasadena, CA For directions, click here. Both lectures begin at 7 p.m. PST and run for approximately an hour. Admission is free. Seating is limited. For more information, call (818) 354-0112. It is now generally accepted that most normal galaxies contain, at their cores, black holes that are millions to billions of times more massive than our Sun. Most galaxies probably also contain millions of stellar-mass black holes, which are the remnants of massive stars. In this lecture I will try to explain what black holes are, in theory, and give a brief overview of some of their remarkable properties. I will then review some of what we know observationally about black holes in Nature. To learn more about Black Holes, click here.