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Hace 1 día · Gravitational waves are waves of the intensity of gravity that are generated by the accelerated masses of binary stars and other motions of gravitating masses, and propagate as waves outward from their source at the speed of light.They were first proposed by Oliver Heaviside in 1893 and then later by Henri Poincaré in 1905 as the gravitational equivalent of electromagnetic waves.
Hace 1 día · "earth day" will show a bee flying across Earth, which when clicked will start a doodle that Google made in 2020 to celebrate Earth Day's 50th anniversary. [ citation needed ] "fresh prince of bel-air ( see it ) ", in celebration of the 30th anniversary of the TV show 's first airing in 1990, displayed a replica of the "FRESH" license plate in the Knowledge Graph.
