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	Frequently Asked Questions Send to a friend  Printable version  En Español Keywords Mariner Probes  Voyager Probes  Viking to Mars  Space Travel  Solar System  Resources Astronomy Gift Shop 2009 Sky Almanac McDonald Observatory logo cap Have we visited all the planets in the solar system?  Artist's concept of New Horizons flying by the Pluto system in 2015. Yes, space probes have visited all of the eight official planets of the solar system. Here is a listing of the planet visited, most recent spacecraft, and year of visit (or year the mission ended): Mercury -- Messenger, 2008. Will enter orbit around Mercury in 2011. Venus -- Venus Express, currently in orbit Mars -- Mars Reconnaissance Orbiter, currently in orbit Jupiter -- Galileo, 2003 Saturn -- Cassini, currently in orbit Uranus -- Voyager 2, 1986 Neptune -- Voyager 2, 1989 Other FAQs Select FAQ category Earth, Moon, and the Sun The Solar System Space Probes and Human Exploration Stars and Nebulae Astronomers and Observatories Galaxies and Cosmology Stargazing and Star Lore » FAQs about StarDate Online Space Probes and Human Exploration Links Apollo Archive Extrasolar Planets Search The Astrobiology Web: Extrasolar Planetary Systems JPL Missions Planetary Exploration Timeline New Horizons Mission to Pluto Warp Drive When? SETI Institute The SETI League
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