Exploration of Jupiter Exploration of Jupiter The exploration of Jupiter has been conducted via close observations by automated spacecraft. It began with the arrival of "Pioneer 10" into the Jovian system in 1973, and, , has continued with eight further spacecraft missions. All of these missions were undertaken by the National Aeronautics and Space Administration (NASA), and all but two have been flybys that take detailed observations without the probe landing or entering orbit. These probes make Jupiter the most visited of the Solar System's outer planets as all missions to the outer Solar System have used Jupiter flybys to reduce fuel requirements
Exploration of Jupiter moons and the ring system, discovering the volcanic activity of Io and the presence of water ice on the surface of Europa. "Ulysses" further studied Jupiter's magnetosphere in 1992 and then again in 2000. The "Cassini" probe approached the planet in 2000 and took very detailed images of its atmosphere. The "New Horizons" spacecraft passed by Jupiter in 2007 and made improved measurements of its and its satellites' parameters. The "Galileo" spacecraft was the first to have entered orbit around Jupiter, arriving in 1995 and studying the planet until 2003. During this period "Galileo" gathered a large amount of information