Dione

A mid-sized icy moon marked by bright, wispy terrain patterns and heavily cratered regions, orbiting Saturn at roughly the same distance as our Moon orbits Earth.

The third crewed mission to land on the Moon launched on January 31, 1971, with astronauts Alan Shepard and Edgar Mitchell spending 33.5 hours on the Fra Mauro highlands and conducting extensive scientific experiments despite communication problems during their lunar descent.

Launched in 1977, Voyager 1 became humanity's most distant spacecraft, visiting Jupiter and Saturn before entering interstellar space in 2012, and continues to transmit data while being over 15 billion miles from Earth.