a very large group of stars in the sky

Abell 370 Parallel Caption: This is a Hubble Space Telescope view of a random patch of sky that reveals how the universe looks at large: a "wallpaper" of innumerable galaxies spread across space and time. They offer a wide assortment of majestic star cities that vary in age, shape, and stellar populations. It’s a narrow view down a corridor that stretches back in time for billions of years. Credits: NASA, ESA, and J. Lotz and the HFF Team (STScI)