The Laser Interferometer Gravitational-Wave Observatory is a large-scale physics experiment and observatory designed to detect cosmic gravitational waves and to develop gravitational-wave observations as an astronomical tool. Two large observatories were built in the United States with the aim of detecting gravitational waves by laser interferometry. These observatories use mirrors spaced four kilometers apart which are capable of detecting a change of less than one ten-thousandth the charge diameter of a proton. The initial LIGO observatories were funded by the United States National Science Foundation and were conceived, built and are operated by Caltech and MIT. They collected data from 2002 to 2010 but no gravitational waves were detected.

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An object from an inexplicable mass gap between neutron stars and light black holes has been discovered – it was detected by LIGO detectors

LIGO goes to space: ESA to proceed with LISA gravitational wave detector

LIGO gravitational wave detector breaks 'quantum limit' to find deep universe black hole collisions

How quantum ‘squeezing’ will help LIGO detect more gravitational waves

LIGO Has Surpassed The Quantum Limit. We Can Explain.

LIGO surpasses the quantum limit

LIGO surpasses the quantum limit

LIGO project begins new gravitational wave hunt

Gravitational-wave detector LIGO is back — and can now spot more colliding black holes than ever

Upgraded LIGO Reactivated: Resumes Unraveling Universe’s Secrets With Enhanced Gravitational Wave Detection

New methods will allow for better tests of Einstein's general theory of relativity using LIGO data

The LIGO observatory is finally back, now with double the sensitivity

After Three Years of Upgrades, LIGO is Fully Operational Again

Gravitational wave detector LIGO is back online after 3 years of upgrades – how the world's most sensitive yardstick reveals secrets of the universe

India Approves Construction of Its Own LIGO Gravitational-Wave Detector

LIGO-India project approved, gravitational-wave detector to be built in India.

Team of physicists suggests LIGO could be used to detect giant alien spacecraft. (By giant, they mean Jupiter sized)

LIGO may be able to detect alien warp drives using gravitational waves

LIGO resumes work in 2023 and will catch gravitational wave signals fainter than ever

LIGO resumes work in 2023 and will catch gravitational wave signals fainter than ever