Wayne R. LeJeune has written:

'Characteristics of earth's magnetospheric substorms, Jupiter's magnetosphere, and satellite system effects' -- subject(s): Bibliography, Magnetospheric substorms, Space vehicles

C. C. Chacko has written:

'Magnetospheric substorms and auroral particle precipitation' -- subject(s): Auroral substorms, Magnetospheric substorms

Galileo was an unmanned spacecraft designed to study Jupiter and its moons. On 13 July 1995, the Galileo Orbiter and the probe separated for the latter to penetrate Jupiter's atmosphere. Its scientific objectives included measuring Jupiter's temperature, chemical composition and its atmospheric pressure structure. The probe entered Jupiter's atmosphere on 7 December 1995.

The only probe that visited Jupiter and stayed for any length of time was the Galileo probe. Launch from Earth in 1989, it arrived at Jupiter in 1995, and orbited Jupiter and its moon until Sept. 2003, when,due to the deterioration of the orbiter, NASA crashed it into Jupiter's atmosphere.

Both Voyagers and Cassini/Huyguens did fly-bys of the planet without going into orbit.

No spacecraft has been sent specifically to study Europa, but several spacecraft that have observed Jupiter also spent time observing Europa. Planned to launch around 2020, the Europa Jupiter System Mission will send 2 to 4 spacecraft to Jupiter, with one spacecraft dedicated to studying Europa: the Jupiter Europa Orbiter.