This image is a snapshot from a simulation of a star collapsing to form a black hole and emitting gravitational waves in the process. The white sphere in the center is the black hole's apparent horizon; the colorful wisps around it are the gravitational waves (l=2, m=2 multipole waves); the inset on the bottom right shows how the waveform would be perceived by a distant observer.

The image was produced by the Numerical Relativity Group archive copy at the Wayback Machine of the Max Planck Institute for Gravitational Physics (Albert Einstein Institute).

The group's leader, L. Rezzolla, has agreed to share this image under the Creative Commons Attribution-Share Alike Licenses 2.5 and 3.0, where the attribution should be to

• L. Rezzolla (AEI) and R. Kähler (ZIB)

with the associated URL

• http://numrel.aei.mpg.de archive copy at the Wayback Machine.

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