... Simulated Gamma ray Sky . ... To get ready, consider this dynamic gamma-ray sky animation - constructed from simulating the first 55 days (seen above at one frame per day) of GLAST observations of cosmic gamma-ray sources. ... GRO J1655 40: Evidence for a Spinning Black Hole . ... Studies of the bright light emitted by the swirling gas frequently indicate not only that a black hole is present, but also likely attributes. ... The Canadarm2 aboard the International Space Station (ISS). ...