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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]
Scientists said on Thursday they have for the first time detected gravitational waves, ripples in space and time hypothesized by Einstein a century ago. Einstein's gravitational waves detected in ...
The blue lines are gravitational waves, ripples in time and space, which is how astronomers detected the merger, and orange and red areas indicate parts of the neutron star being stripped away.
Gravitational waves are not easily detectable. When they reach the Earth, they have a small amplitude with strain approximately 10 −21, meaning that an extremely sensitive detector is needed, and that other sources of noise can overwhelm the signal. [92] Gravitational waves are expected to have frequencies 10 −16 Hz < f < 10 4 Hz. [93]
Gravitational waves are minute distortions or ripples in spacetime caused by the acceleration of massive objects. They are produced by cataclysmic events such as the merger of binary black holes , the coalescence of binary neutron stars , supernova explosions and processes including those of the early universe shortly after the Big Bang .
Supermassive black holes merging in distant galaxies could be creating a background hum of gravitational waves, which were first proposed by Einstein.
A black hole is a region of spacetime wherein gravity is so strong that no matter or electromagnetic energy (e.g. light) can escape it. [2] Albert Einstein's theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.
The imprint reflects ripples that arose as early, in the existence of the universe, as the first nonillionth (10 −30) of a second. Apparently, these ripples gave rise to the present vast cosmic web of galaxy clusters and dark matter. Based on the 2013 data, the universe contains 4.9% ordinary matter, 26.8% dark matter and 68.3% dark energy.