The kilonova associated with GW170817 (inset) as observed by NASA's Hubble Space Telescope (visible light) and Chandra X-ray Observatory (blue) over nine days in August 2017. | NASA/CXC/E. Troja

Scientists Wonder If the Collision of Two Neutron Stars Created a Black Hole

Gravitational waves and visible light were detected for the first time from two colliding neutron stars, and researchers are now looking for signs of what happened next.

This still from a NASA animation shows the aftermath of a collision of two neutron stars, which merged into an objected called GW170817. Gravitational waves from the collision were detected on Aug. 17, 2017. | NASA's Goddard Space Flight Center/CI Lab
The Swift Ultraviolet/Optical Telescope imaged the kilonova from two merging neutron stars in the galaxy NGC 4993 (inset) on Aug. 18, 2017, just 15 hours after gravitational waves and a gamma-ray burst from the event was detected. | NASA/Swift