201610y ago
Discovery
Gravitational waves announced
LIGO revealed the first direct detection of gravitational waves — ripples in spacetime from two black holes merging 1.3 billion light-years away, recorded the previous September.
On This Day in Space
LIGO revealed the first direct detection of gravitational waves — ripples in spacetime from two black holes merging 1.3 billion light-years away, recorded the previous September.