Black holes merging. Image 1 of 2. Supercomputer simulation of two non-spinning black holes (grey discs right and left of centre) merging. According to Einstein's theory of general relativity, the merger of two massive objects causes ripples (yellow lines) in space-time. These ripples, known as gravitational waves travel at the speed of light but have not been observed directly. A black hole is formed when the core of a star collapses under its own weight, increasing its gravitational field to the point where nothing can escape, not even light. Black hole mergers are the most powerful events in the universe, releasing more energy than all of the stars in the universe combined. This simulation was created in 2006 on the NASA Columbia...
Science Photo Library was founded in 1981 by Michael Marten, one of the authors of "Worlds Within Worlds", a book exploring different ways to observe the universe - from electron micrographs, to images of earthrise taken from the Apollo spacecraft. When Marten started receiving requests for the beautiful images in the book, he had an idea of setting up Science Photo Library.
Since then, Science Photo Library has continued to work alongside world acclaimed photographers and the leading science and medical experts to provide a central source of the best science and specialist imagery available. Although the collection started with scientific images, it has grown to encompass all aspects of science and their impact on everyday life.
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