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A probe is an unmanned vehicle, such as a satellite, equipped to obtain scientific information about the solar system. Historically, Europe, the United States of America and Russia have been active in launching probes into space. Below is a list of some interesting probes. Use the attached link for more detailed information on individual spacecraft.
Grail (Gravity Recovery and Interior Laboratory): mapping moons interior; launched 2011
SOHO: Solar and Heliospheric Observatory; takes first-light images of the Sun for analysis of solar activity and coronal composition.
Ulysses: Joint project of the ESA (European Space Agency) and NASA (National Aeronautics and Space Administration) of the USA
Beyond Kupiers Belt
Voyager: 1 and 2 travel outside our solar system
Viking: consisted of two unmanned space missions to Mars: Viking 1 and Viking 2. Viking 1 was launched on 20 August 1975 and Viking 2 was launched on 9 September 1975
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