This is a simulation of a black hole eating a neutron star. The blue pattern represents the gravitational waves emitted by the event.
Numerical relativity simulation: S.V. Chaurasia (Stockholm University), T. Dietrich (Potsdam University and Max Planck Institute for Gravitational Physics)
Scientific visualization: T. Dietrich (Potsdam University and Max Planck Institute for Gravitational Physics), N. Fischer, S. Ossokine, H. Pfeiffer (Max Planck Institute for Gravitational Physics)
On 17 August, 2017, the Laser Interferometer Gravitational-Wave Observatory detected gravitational waves from a neutron star collision. Within 12 hours, observatories had identified the source of the event within the galaxy NGC 4993 and located an associated stellar flare called a kilonova. Hubble watched as the flare of light from the kilonova faded over the course of 6 days. The inset images show the decreasing brightness in observations taken on the 22nd, 26th, and 28th.