The Juno spacecraft will, for the first time, see below Jupiter's dense clouds.
Cassini has been unlocking the secrets of Saturn, its rings, moons and magnetosphere since 2004. It is currently on an extended mission.
New Horizons is the first mission to explore Pluto and the Kuiper Belt.
MESSENGER is the second mission to study Mercury, our solar system's innermost planet. During a series of flybys that edged it closer to orbit...
Voyager 1 and 2 took advantage of a rare planetary alignment to conduct a historic tour of the outer solar system and build enough velocity to...