Thousands of galaxies crowd into this Herschel image of the distant universe. Each dot is an entire galaxy containing billions of stars. This image image was taken in a region of space called the Lockman hole, which allows a clear line of sight out into the distant Universe. This "hole" is located in the familiar northern constellation of Ursa Major, The Great Bear. Credit: ESA & SPIRE Consortium & HerMES consortia
From this Space.com article.