More events needed to pin down gravitational waves backstory
Astronomers seek origins of black hole pairs responsible for spacetime ripples
![two black holes merging](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/06/061716_cc_ligo_free.jpg?fit=860%2C460&ssl=1)
DUOS’ DANCE Mergers of two pairs of black holes (illustrated) showcase ability of gravitational waves as a new tool for understanding the universe. LIGO detected gravitational waves from both mergers shown, but at different times and in different parts of the sky.
A. Simonnet/LIGO