Gravitational waves

Einstein published the first papers predicting the existence of gravitational waves — ripples in the fabric of space-time — almost a century ago. Physicists at the recently upgraded Laser Interferometer Gravitational-Wave Observatory (LIGO) have announced that they have measured these cosmic deformations, opening up a new field of gravitational-wave astronomy. Discover Nature’s coverage of the unfolding story and other gravitational-wave experiments, as well as everything you ever wanted to know about Einstein’s general theory of relativity.

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