Gravity bends light. If gravity is too strong it bends light completely. Gravity bends (distorts) not only space, but space-time. This planetarium show is a friendly introduction to the General Theory of Relativity suitable for general audiences. You do not have to know what the local metricization of Riemannian manifolds are to appreciate the basis and the results of the General Theory of Relativity. Black Bubbles are the most extreme results of this theory; some people also call these black bubbles, black holes, but bubbles capture a better picture of the events horizon and what really goes on there. They are literally Gravity to the Max. By looking at something in its most extreme case facets that are not revealed in mundane application like normal falling motion on the earth are shown.

The infinite time dilation (time asymmetry) between an outside the bubble observer and an observer who decides to visit the bubble are explained. Some of the other weird properties of Black Bubbles including resent observation of the vicinity of a black bubble in the center of our galaxy will be shared with the audience. Anyone with an inquiring mind and imagination of a typical third grader can enjoy this planetarium show. Those few people who do not want to flex (distort) or exercise (move) their mind are advised to stay home and watch mindless television so called reality shows, that are doubtless on at the same time on Saturday evening.

PowerPoint presentation used on  7PM, Saturday, November 17, 2012.
Stars orbiting around the 2.6 million solar mass black hole in the center of our galaxy movie.
Gravitational waves from two merging black holes movie done at the GSFC in 2006 by Joan Centrella, John Baker, and Dale Choi.
Hubble Black Hole Astronomy Site shown on November 21, 2009.
Spinning Black Bubbles merging can cause the spins to flip.

Image from http://www.spacetimetravel.org/expeditionsl/expeditionsl.html; of a simulated view of a black bubble (hole) in front of the Milky Way Galaxy. The black bubble is 10 solar masses so its Schwarzschild radius, events horizion radius, is 30 kilometers, and is viewed from a distance of 600 kilometers which is 200 Schwarzschild radii away and essentially Newtonian gravity at this far distance of 600 kilometers from the Bubble. 

Montgomery College's Planetarium home page

Web page by Dr. Harold Alden Williams.
Last changed 8:30A.M. November 18, 2012.