The discovery, based on ripples in space-time detected by LIGO, supports a prediction made by Albert Einstein that's essential to his general theory of relativity. The ripples LIGO detected are based on the merging of two black holes, Reitze said.
"What's really exciting is what comes next," he said. "I think we're opening a window on the universe -- a window of gravitational wave astronomy."
LIGO is described in a statement as "two identical detectors carefully constructed to detect incredibly tiny vibrations from passing gravitational waves," one located in Louisiana, the other in Washington State. The project was created by scientists from Caltech and MIT and funded by the National Science Foundation.
Szabolcs Marka, a physics professor at Columbia University, told CNN that "we will be able to study not just Einstein's general relativity -- we'll be able to find objects we only imagined would exist. We should see a universe that has never been observed before."