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Deep Space 1
Launch: October 24, 1998
Unlike missions focused on science investigations, Deep Space 1 was a spacecraft designed to flight-test new technologies -- including an ion engine that could power solar system explorers of the future. With its primary mission successfully completed, the craft went on an extended mission and flew by comet Borrelly in September 2001, taking the best pictures ever of a comet's nucleus.
+ Overview
› Deep Space 1 home page
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Galileo to Jupiter
Launch: October 18, 1989
Upon arrival at Jupiter in December 1995, the Galileo spacecraft delivered a probe that descended into the giant planet's atmosphere. The orbiter then completed many flybys of Jupiter's major moons, reaping a variety of science discoveries. The mission ended on Sept. 21, 2003 when the spacecraft plunged into Jupiter's atmosphere.
+ Overview
› Galileo home page
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Genesis
Launch: August 8, 2001
Genesis collected samples of charged particles in the solar wind and returned them to Earth in September 2004. Although the capsule's parachutes did not deploy, scientists expect to be able to achieve most of their science objectives with samples recovered from the capsule.
+ Overview
› Genesis home page
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Magellan to Venus
Launch: May 4, 1989
This orbiter used imaging radar to map 99 percent of the surface of Venus over four years. After concluding its radar mapping, Magellan made global maps of Venus's gravity field. Flight controllers also tested a new maneuvering technique called aerobraking, which uses a planet's atmosphere to slow or steer a spacecraft.
+ Overview
› Archived Magellan site
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Mariner 1-2 to Venus
Mariner 1 launch: July 22, 1962
Mariner 2 launch: August 27, 1962
Mariner 2 became the first spacecraft to fly by another planet, studying Venus' atmosphere and surface. During its journey to Earth's neighbor, the craft made the first-ever measurements of the solar wind.
+ Overview
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Mariner 10 to Venus and Mercury
Launch: November 3, 1973
With the scorched inner planet of Mercury as its ultimate target, the Mariner 10 spacecraft pioneered the use of a "gravity assist" swing by Venus to bend its flight path.
+ Overview
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Mariner 3-4 to Mars
Mariner 3 launch: November 5 1964
Mariner 4 launch: November 28, 1964
Mariner 4 collected the first close-up photos of another planet when it flew by Mars. As it passed the planet it revealed lunar-type impact craters, some of them touched with frost in the chill Martian evening.
+ Overview
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