Just before its cameras were shut down permanently to conserve power, Voyager 1 captured a final series of images of the solar system, including one frame showing Earth as a single pixel suspended in a sunbeam. Carl Sagan, who had championed the idea against NASA's initial reluctance, later used the image as the centerpiece of his book 'Pale Blue Dot,' a meditation on humanity's cosmic insignificance and shared fate.
By February 1990, Voyager 1 had already completed its primary mission, flying past Jupiter and Saturn, and was speeding out of the solar system at over 38,000 miles per hour. NASA planned to switch off its cameras permanently to conserve the spacecraft's dwindling power for other instruments. Before that happened, astronomer Carl Sagan, who served on the imaging team, pushed for one last look backward.
Many engineers considered it pointless, even risky, since pointing the camera near the sun could damage the sensor. Sagan persisted, and on February 14, 1990, from roughly 3.7 billion miles away, Voyager 1 captured a mosaic of 60 images, including one in which Earth appears as a single pale blue pixel, less than a single pixel wide, caught in a scattered ray of sunlight.
Sagan later wrote one of the most quoted passages in popular science literature about that image, describing Earth as 'a mote of dust suspended in a sunbeam' and arguing that its smallness demanded humility and cooperation among nations. The photograph, unremarkable at first glance, became one of the most philosophically influential images in the history of space exploration.