Radioisotope Thermoelectric Generator

The first spacecraft to cross the asteroid belt and fly past Jupiter.

The first fully successful Mars landing returns years of images and searches for life.

The only spacecraft to visit all four giant planets: Jupiter, Saturn, Uranus, and Neptune.

The most distant human-made object, first to enter interstellar space.

The first spacecraft to orbit Jupiter discovers evidence of an ocean inside Europa.

Thirteen years at Saturn, and the first landing on a moon of another planet.

The fastest launch in history delivers the first close-up look at Pluto.

A car-sized nuclear-powered rover lands via sky crane and proves ancient Mars was habitable.

A sample-caching rover and the first aircraft to fly on another planet.