A dual Venus-Halley's Comet mission launched in 1984 that dropped a lander and balloon on Venus before continuing on to make the first-ever close observations of a comet's nucleus in March 1986.

Sol (The Sun)

A massive yellow dwarf star that contains 99.86% of the Solar System's mass and powers almost all life and weather on Earth through nuclear fusion of hydrogen into helium in its core.

Rhea

A heavily cratered, icy mid-sized moon with a reflective surface composed primarily of water ice mixed with rocky material, orbiting as Saturn's second-largest satellite.