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| Voyager
Launches: August 20 and September 5, 1977
Voyager 1 and 2 flew by Jupiter and Saturn, and Voyager 2 also visited Uranus and Neptune. Both craft are now heading out of our solar system. Voyager 1 is the most distant human-made object in space.
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| Ulysses
Launch: October 6, 1990
A joint NASA/European Space Agency mission, Ulysses for the first time sent a spacecraft out of the the plane in which Earth and other planets orbit the Sun in order to study the Sun's poles. Ulysses continues to monitor the Sun.
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| Mars Global Surveyor
Launch: November 7, 1996
This orbiter has studied the entire martian surface, atmosphere and interior, and has returned more data about the red planet than all other previous Mars missions combined.
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| Cassini-Huygens
Launch: October 15, 1997
A joint endeavor of NASA, the European Space Agency and the Italian Space Agency, Cassini is conducting an intensive study of Saturn's rings, its moons and magnetosphere.
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| Stardust
Launch: February 7, 1999
Stardust successfully flew through the cloud of dust that surrounds the nucleus of comet Wild-2 and gathered a sample of cometary material.
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| Mars Odyssey
Launch: April 7, 2001
Odyssey is an orbiting spacecraft designed to determine the makeup of the martian surface, to detect water and shallow buried ice, and to study the radiation environment.
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| Mars Exploration Rovers
First rover launch: June 10, 2003. Second rover launch: July 7, 2003
Two rovers, working on opposite sides of Mars, successfully completed their primary mission in April 2004. As of November 2004, both rovers are now in extended missions.
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| Microwave Instrument on the Rosetta Orbiter
Launch: March 2, 2004
The European Space Agency's Rosetta spacecraft will rendezvous with a comet in 2014. JPL's microwave instrument onboard Rosetta will study gases given off by the comet.
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| Deep Impact
Launch: January 12, 2005
Deep Impact traveled to comet Tempel 1 and deployed an impactor that was essentially "run over" by the nucleus of Tempel 1 on July 4, 2005. The spacecraft is now on a trajectory to fly past Earth in December 2007.
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| Mars Reconnaissance Orbiter
Launch: August 12, 2005NASA's Mars Reconnaissance Orbiter will take the most powerful telescopic camera ever to another planet, plus five other scientific instruments.
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Dirty Ice Balls
Spacecraft offer unique views of comets. Our new slide show features comet images taken in space.
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Deep Impact Mission Log
Learn what the mission team is doing to prepare for its July 4 encounter with comet Tempel 1.
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First Person
Get an inside view of NASA's Cassini mission to Saturn with JPL's Dr. Kevin Grazier, who also discusses his career covering science fact and fiction...
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Cassini Photo Essay
Enjoy stunning images of Saturn and its moons.
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