What did they predict, and what didn't they. Here are a list of things I read on the web that I am skeptical about. I don't no where to find reliable sources. 1. how long it would take for the solar system to rotate around the galaxy. 2. eclipses, including one that actually happened in 1999. 3. the existence of a black hole in the center of the galaxy. 4. gamma ray bursts come from the black hole, and when major bursts would happen.