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LIGO on Twitter: "The @LIGO and @EGO_virgo detectors use laser interferometry to create the most precise ruler ever, able to measure changes in spacetime curvature less than a millionth millionth the width
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Multimedia Gallery - LIGO opens new window on the universe (Image 8) | NSF - National Science Foundation
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PGO Delivers Optical Components For Laser Interferometric Gravitational Wave Observatory (LIGO) Project
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