Hello, Universe

After decades of dreaming the Laser Interferometer Gravitational-Wave Observatory (LIGO) into existence, nine years of initial operations, and a five-year period spent installing equipment with upgraded sensitivity, LIGO’s Caltech-led research team resumed listening to the universe in May 2015.

To their immense surprise, detection came almost immediately. At 5:51 a.m. EST on Monday, September 14, 2015, the twin LIGO detectors observed gravitational waves.

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