Gravitational waves are extremely faint ripples in the fabric of space and time, generated by some of the most violent events in the universe.
The waves detected by the laureates came from the collision of two black holes some 1.3 billion light-years away. A light-year is about 5.88 trillion miles.
The waves were predicted by Einstein a century ago as part of his theory of general relativity. General relativity says that gravity is caused by heavy objects bending space-time, which itself is the four-dimensional way that astronomers see the universe.
Continue reading: Nobel prize cites finding of ripples in fabric of universe