Frame from a 3D simulation of gravitational waves produced by merging black holes, from a calculation completed by Drs. John Baker, Joan Centrella, Dae-Il Choi, Michael Koppitz, and James van Meter of the Numerical Relativity Group at NASA's Goddard Space Flight Center and performed on the Columbia Supercomputer at the NASA Advanced Supercomputing facility at Ames Research Center.  The amber honeycomb structures are the contours of the strong gravitational field near the black holes.  The red curtain-like structures are gravitational radiation.  Image credit: C. Henze, NASA.