A tiny spacecraft nicknamed 'Wall-E' shot this pale-blue-dot shot of Earth from more than 600,000 miles away

'Wall-E' is one of a pair of CubeSats that's following a lander spacecraft as it cruises toward Mars
In 1990, the Voyager 1 spacecraft was cruising outward in the solar system, heading toward interstellar space. The late Carl Sagan, a member of the Voyager imaging team, had the idea of pointing the spacecraft back toward home for one last look.The result was an image that Sagan made famous in his 1994 book "Pale Blue Dot" — an image showing Earth as a barely visible bluish d