El Gordo

A splatter of red, denoting galaxies, lies at the center of this image and extends toward the lower left. This is the remnant of a cosmic collision. Eons ago, one group of galaxies plunged into another at millions of miles per hour, leaving a wreckage in its wake. The galaxy cluster El Gordo is all that remains of this raucous event. Learn more at Dark Energy Detectives. Photo: Dark Energy Survey