Pale Blue Dot, 2020
Voyager 1's last photograph of Earth, reprocessed by NASA in 2020: a single point of light inside a stray beam scattered within the camera.
On 14 February 1990, 34 minutes before its cameras were shut down for good, Voyager 1 looked back and photographed the Earth from about 6 billion kilometres away. It belonged to a 60-frame sequence the mission called the Family Portrait of the Solar System. Carl Sagan proposed the idea in 1981, and approval took eight years and six requests. The Jet Propulsion Laboratory reprocessed the data and published this version in 2020.
Earth is the single point of light inside the scattered-light band. That band is not a sunbeam in space but light scattered inside the camera optics, because the camera had to be aimed within a few degrees of the Sun, and the ray falling across the planet was chance. The light that made the dot had left Earth five hours and 36 minutes earlier.