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| Advanced Composition Explorer (ACE)
Major mission of the Explorer program.
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| ACRIMSAT Mission
The ACRIMSAT Mission will measure Total Solar Irradiance (TSI), measuring the Sun's energy, during its five-year mission life.
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| Apollo
President Kennedy's bold challenge set the nation on a journey unlike any before in human history--a journey to land on the moon.
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| Cassini-Huygens Mission
Unlocking the secrets of Saturn.
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| Deep Impact
Exploring Comet Tempel 1 to determine the origins of life in our Solar System.
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| Gemini
Bridge to the moon.
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| Genesis Mission
The search for origins.
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| Hayabusa (MUSES-C)
Hayabusa (MUSES-C) is Japan's asteroid sample return mission.
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| Mars Exploration Rovers
Rovers Spirit and Opportunity explore the Martian landscape.
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| Mars Global Surveyor
After studying the Red Planet four times longer than originally planned, the Mars Global Surveyor orbiter succumbed to battery failure.
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| Mars Odyssey
This orbiter is mapping the mineralogy and morphology of the Martian surface.
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| Mars Pathfinder
Mars Pathfinder was the first mission to deliver a lander and a free-ranging robotic rover to the surface of Mars.
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| Mars Reconnaissance Orbiter
The mission will determine whether long-standing bodies of water ever existed on Mars.
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| Mercury
America's First Space Program.
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| Mercury, Surface, Space Environment, Geochemistry and Ranging (MESSENGER) Mission
MESSENGER will study Mercury, the closest planet to the Sun.
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| New Horizons
New Horizons began its journey across the solar system to conduct flyby studies of Pluto and its moon.
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| Pioneer
A journey through our solar system and beyond.
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| Pioneer Venus
The mission's objective was to investigate the Venus's solar wind, map the planet's surface and study the upper atmosphere.
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| Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI)
RHESSI's primary mission is to explore the basic physics of particle acceleration and explosive energy release in solar flares.
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| Rosetta Mission
Rosetta will orbit comet 67P and accompany it on its journey to the Sun.
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| Skylab
America's first space station and orbital science and engineering laboratory.
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| SMART 1
SMART 1's two part mission will test new technologies and explore darker regions of the Moon's south pole for the first time.
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| Solar and Heliospheric Observatory (SOHO)
SOHO, designed to study the sun, from its deep core to its outer corona, is a cooperative program between ESA and NASA.
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| Solar Radiation and Climate Experiment (SORCE)
A NASA-sponsored satellite mission that will provide state-of-the-art measurements of incoming x-ray, ultraviolet, visible, near-infrared, and total solar radiation.
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| Solar TErrestrial RElations Observatory (STEREO)
STEREO Readies for Sun Imaging Mission
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| Stardust
Stardust returns samples from Comet Wild 2 to Earth.
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| Tracking and Data Relay Satellite (TDRS)
This system of satellites and ground stations makes up a portion of the Space Network and provides mission services for near Earth satellites and orbiting vehicles.
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| Transition Region and Coronal Explorer (TRACE) Mission
TRACE enables solar physicists to study the connections between fine-scale magnetic fields and the associated plasma structures on the Sun.
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| Ulysses Mission
A mission to study the Sun at all latitudes.
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| Viking
The Viking Mission to Mars: Determining whether life ever existed on Mars.
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| Voyager - The Interstellar Mission
Voyager 1 and Voyager 2 journey to study the region in space where the Sun's influence ends and the dark recesses of interstellar space begin.
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