Gravitational wave

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Gravitational waves are ripples in spacetime which are created whenever objects with mass move. They were predicted by Albert Einstein in 1916 on the basis of his theory of general relativity.^[1] They were first directly detected on 14 September 2015.^[2]

To make gravity waves strong enough to be detected, something very massive must accelerate very fast. Sources of detectable gravitational waves include binary star systems composed of white dwarfs, neutron stars, or black holes.

1. ↑ B. Barish: The detection of gravitational waves using LIGO. [1]
2. ↑ Abbott, Benjamin P.; et al. (LIGO Scientific Collaboration and Virgo Collaboration) (2016). "Observation of Gravitational Waves from a Binary Black Hole Merger". Physical Review Letters. 116 (6): 061102-1–061102-16. arXiv:1602.03837. Bibcode:2016PhRvL.116f1102A. doi:10.1103/PhysRevLett.116.061102. PMID 26918975. S2CID 124959784.