Day 359 of 365
December 25
⚛️
Physics Gravitational Waves
Gravitational waves are ripples in spacetime caused by accelerating massive objects. Predicted by Einstein in 1916, they were first detected in 2015 by LIGO. They open a new window on the universe, allowing us to 'hear' black hole mergers and neutron star collisions.
💡 Did you know?
The gravitational waves detected by LIGO changed the lengths of their 4-km detectors by less than a proton's width!
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