an image of a very large and colorful object in the sky

Double Quasars Illustration Caption: Illustration Shows Quasars Coming Together in Merging Galaxies. This artist's conception shows the brilliant light of two quasars residing in the cores of two galaxies that are in the chaotic process of merging. The gravitational tug-of-war between the two galaxies stretches them, forming long tidal tails and igniting a firestorm of starbirth. Credits: Image - NASA, ESA, Joseph Olmsted (STScI)