Hunting Gravitational Waves: The LIGO Laser Interferometer Project in Photos

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LIGO Hanford Observatory

Credit: LIGO Laboratory
The Laser Interferometer Gravitational-Wave Observatory (LIGO) tries to detect gravitational waves. The detector consists of a 4-foot diameter vacuum pipe…Read More »

arranged in the shape of an L with 2.5-mile (4-kilometer) arms. Since gravitational waves penetrate the earth unimpeded, these installations don't need exposure to the sky and remain entirely shielded in a concrete cover. At the vertex of the L, and at the end of each of its arms, hang test masses from wires, and the masses possess mirror surfaces. These mirrors make up the sensors of gravitational waves. Two facilities, thousands of miles apart, will eliminate uncertainty in the results.   Less «
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