The Hubble Deep Field. Mankind's deepest, most detailed optical view of the universe. Staring at one tiny spot in the sky for ten days, Hubble kept taking pictures one after another for the entire exposure time, accumulating data. Each exposure was typically 15 to 40 minutes long. Separate images were taken in ultraviolet, blue, red, and infrared light.

Thousands of galaxies are found in this very small section of the sky. Note the varied shapes and colors and sizes (size mostly differing because of distances). The most distant objects are well over 10 billion light years away.