The mysteries of black holes will be discussed at Fiske Planetarium on the campus of the University of Colorado at Â鶹ӰԺ on Friday, Sept. 12, and Tuesday, Sept. 16, at 7:30 p.m. Professor Andrew Hamilton will present the live star show, "Black Holes and Relativity," as part of the fall 2003 schedule of monthly astronomy talks. The live talks are given by CU-Â鶹ӰԺ professors and guest lecturers. Hamilton is a professor in CU-Â鶹ӰԺ's astrophysical and planetary sciences department.