This image of the Earth, called Pale Blue Dot, is a part of a family portrait of the solar system taken by Voyager 1. The spacecraft took 60 frames for a mosaic of the solar system looking back from a distance of over 4 billion miles from Earth. From that distance Earth is a tiny point of light, a crescent only 0.12 pixel in size. At the time its picture was taken, Earth happen to lie right in the center of one of the scattered light rays resulting from taking the image near the sun. This enlarged image of the Earth was taken through three color filters—violet, blue and green—and recombined to produce the color image. The background noise in the image is an artifact resulting from the high magnification.
Image Credit: NASA/JPL