The Cassini–Huygens space-research mission, commonly called Cassini, involved a collaboration between NASA, the European Space Agency, and the Italian Space Agency to send a probe to study the planet Saturn and its system, including its rings and natural satellites.

Voyager one is a space probe that was launched by NASA. Part of the Voyager program to study the outer Solar System, Voyager one was launched sixteen days after its twin, Voyager two.

Pioneer is an American space probe, weighing two hundered and fifty eight kilograms, that completed the first mission to the planet Jupiter. Thereafter, Pioneer became the first of five artificial objects to achieve the escape velocity that will allow them to leave the Solar System.

The Hubble Space Telescope is a space telescope that was launched into low Earth orbit and remains in operation. It was not the first space telescope but it is one of the largest and most versatile, well known both as a vital research tool and as a public relations boon for astronomy.