“We succeeded in taking that picture [from deep space], and, if you look at it, you see a dot. That’s here. That’s home. That’s us. On it, everyone you ever heard of, every human being who ever lived, lived out their lives.”
The Pale Blue Dot is a photograph of planet Earth taken in 1990 by Voyager 1 from a record distance (6,086,176,360.601 kilometers / 3,781,782,502.403 miles), showing it against the vastness of space. By request of Carl Sagan, NASA commanded the Voyager 1 spacecraft, having completed its primary mission and now leaving the Solar System, to turn its camera around and to take a photograph of Earth across a great expanse of space.
Subsequently, the title of the photograph was used by Sagan as the primary title of his 1994 book, Pale Blue Dot: A Vision of the Human Future in Space.