The planet appearing as a tiny speck in Voyager 1’s Pale Blue Dot image is Earth.
Voyager 1 photographed Earth on February 14, 1990, from about 40.5 astronomical units away—roughly 6 billion kilometers. At that distance, Earth occupied less than a single pixel in the spacecraft’s narrow-angle camera image, appearing as a faint bluish point crossed by a bright band of scattered sunlight.
The photograph was part of a wider “Family Portrait” of the Solar System. Astronomer Carl Sagan strongly advocated turning Voyager 1 around for the image, even though it had little scientific value as a conventional planetary photograph. The camera was later switched off to conserve power for the spacecraft’s continuing mission.
The image is sometimes confused with photographs of other planets in the Family Portrait. Venus also appeared in the broader composite, but the famous Pale Blue Dot itself is Earth. Its blue appearance comes largely from sunlight scattering in Earth’s atmosphere, with clouds adding reflected white light.