Black hole heavyweights triggered gravity wave event
LIGO team expects more detections later this year
![black holes](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/02/021616_ligo-blackholes_free.jpg?fit=860%2C460&ssl=1)
MAKING WAVES In the wake of a black hole collision, one bigger black hole (middle) is left behind as gravitational waves (blue and purple bands) ripple away, as seen in this still from a computer simulation. The colors near the black hole illustrate how gravity slows time (clocks would tick slower in the orange zone).
SXS