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The Laser Interferometer Gravitational-Wave Observatory (LIGO) is a large-scale physics experiment and observatory designed to detect cosmic gravitational waves and to develop gravitational-wave observations as an astronomical tool. [1]
The first direct observation of gravitational waves was made on 14 September 2015 and was announced by the LIGO and Virgo collaborations on 11 February 2016. [3] [4] [5] Previously, gravitational waves had been inferred only indirectly, via their effect on the timing of pulsars in binary star systems.
Currently, the most sensitive ground-based laser interferometer is LIGO – the Laser Interferometer Gravitational Wave Observatory. LIGO is famous as the site of the first confirmed detections of gravitational waves in 2015. LIGO has two detectors: one in Livingston, Louisiana; the other at the Hanford site in Richland, Washington.
The Advanced LIGO Documentary Project is a collaboration formed in the summer of 2015 among Caltech, the Massachusetts Institute of Technology and Director Les Guthman to make the definitive documentary about the Advanced LIGO project's search for, and expected first detection of, gravitational waves; and to record a longitudinal video archive of the project for future researchers and historians.
LISA will be the first dedicated space-based gravitational-wave observatory. It aims to measure gravitational waves directly by using laser interferometry. The LISA concept features three spacecraft arranged in an equilateral triangle with each side 2.5 million kilometers long, flying in an Earth-like heliocentric orbit. The distance between ...
Number 3.Utah potash mining ponds. Vast expanses of the valuable potassium-rich mineral, which is often used to fertilize crops, are drawn from the Earth at this site.
Solar and Heliospheric Observatory (SOHO) 1996 Earth–Sun L1 point: Solar Space Telescope: 2009 709 km SSO; life: 3 years Sommers–Bausch Observatory: 1949 Boulder, Colorado, US Sonnenborgh Observatory: 1853 Utrecht, Netherlands Sonoma State Observatory: 1976 Rohnert Park, California, US South African Astronomical Observatory. Cape Town ...
There are several ground-based laser interferometers which span several miles/kilometers, including: the two Laser Interferometer Gravitational-Wave Observatory (LIGO) detectors in WA and LA, USA; Virgo, at the European Gravitational Observatory in Italy; GEO600 in Germany, and the Kamioka Gravitational Wave Detector (KAGRA) in Japan. While ...