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LIGO — Laser Interferometer Gravitational-Wave Observatory

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Chaos theory · Lorenz equations

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LIGO (pronounced “lie-go,” English: Laser Interferometer Gravitational-Wave Observatory) is a large-scale physics experiment and facility for detecting gravitational waves, whose existence Albert Einstein proposed in 1916. Its English name literally translates as “Laser Interferometer Gravitational-Wave Observatory.” The research was jointly established in 1992 by Kip Thorne and Ronald Drever of the California Institute of Technology and Rainer Weiss of the Massachusetts Institute of Technology, and is a collaborative research project involving scientists from both institutions and other universities and institutions. Researchers involved in research planning and analysis of gravitational-wave astronomy data form an organization called the LIGO Scientific Collaboration, with over 900 scientists worldwide participating12. LIGO was established by the US National Science Foundation (NSF), with major contributions from the UK's Science and Technology Facilities Council (English version), Germany's Max Planck Institute, and the Australian Research Council (English version)34. In September 2015, following improvements costing 200 million dollars over 5 years, the “world's largest gravitational-wave facility” was completed at a total cost of 620 million dollars25. LIGO is the largest and most ambitious project established by NSF67. The essence of LIGO facilities lies in their ability to detect extremely small relative strains of 10-21 through the principle of the Michelson interferometer. This strain of 10-21 is often popularly described as “a strain the size of the diameter of a hydrogen atom (1.1 ×10-10 m) relative to the distance between Earth and the Sun (an astronomical unit, 1.5 ×1011 m).” https://ja.wikipedia.org/wiki/LIGO

Source updated 2026-05-15 · Snapshot 2026-10-08

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