Distant interacting galaxies – located 23 million light-years away – bear an uncanny resemblance to a penguin guarding an egg. The “penguin” was probably once a relatively normal-looking spiral galaxy, flattened like a pancake with smoothly symmetric spiral arms. The “egg” is distinctly different with its greenish glow, which tells the story of a population of much older stars. Discover more about this pair that has a mutual gravitational attraction, slowing dragging them closer together: go.nasa.gov/2EcCIDm Credit: NASA-ESA/STScI/AURA/JPL-Caltech #nasa #spacepics #nasajpl #universe