On Valentine's Day 1990, NASA's Voyager 1 spacecraft snapped what would become one of the most iconic images ever taken: a view of Earth from 3.7 billion miles (6 billion kilometers) away.

On its way, Blue Ghost captured incredible images of Earth as it shrunk into a small pale dot in the distance. While orbiting the moon, Blue Ghost has been completing a series of engine burns to ...

The second shot included the home planet, a blue dot glimmering in the blackness of ... with detailed shots of the moon’s gray pockmarked surface. At the same time, an on-board receiver tracked ...