The Origins of Gravitational Waves

By the 1960s or 70s most experts in general relativity were pretty sure that gravitational waves would be real but we didn't have any way to detect them. In 1974, radio astronomers named Joe Taylor and Russell Hulse detected a pair of neutron stars in a close orbit to each other. These two pulsars as they tighten their orbits and spun up were emitting gravitational waves and large quantities into space all around. So this provided the first real proof or evidence that gravitational waves really exist.