Like the Luna 1 and Mars Space Program, the Libertas missions were meant to study other planets and moons. In 1985 the Libertas 1 probe was sent to study Venus. Miscalculations veered it off course and sent it tumbling into the sun. The Libertas 2 (1987) and 3 (1988) probes were able to rotate around the planet and gather data. Libertas 4 crash-landed on Mercury in 1990. In 1991 Libertas 5 was sent to study Saturn’s moons. Libertas 5 made a flyby of Neptune and is still going away from earth and is now in deep space.