Launch

Arrival

Type

Name

Details

1610

Earth based

Galileo

Finds satellites

1994

July

Earth based

Spectroscopic Analysis

Impact caused interior gases to excite to incandescent levels and brought them to the surface.

1995

Earth based

Hubble Space Telescope

Finds thin atmosphere around Europa

1973

2 March 1972

3 December 1973

Flyby

Pioneer 10

Measured radiation and magnetic fields

1979

5 September 1977

 5 March

Flyby

Voyager 1

Voyager detected ammonia freezing in upper atmosphere at -125c and forming cirrus like clouds.

1979

20 August 1977

9 July 1979

Flyby

Voyager 1

Finds volcanoes on Io

1979

c. 5 March

Flyby

Voyager

Detects ring system

1979

c. 5 March

Flyby

Voyager

Infrared analysis of atmosphere shows that it is composed of 87%H2 and 13%He

1992

6 October

8 February 1992

Flyby

Ulysses

Polar Solar Orbit scans Jupiters Magnetosphere

1995

18 October 1989

7 December 1995

Lander / Orbiter

Galileo

descended into atmosphere and survived for 57 minutes.

1995

 7 December 17:46 UT

Orbiter / Flyby

Galileo

Flies 900 km above surface of Io and discovers a dense iron core

1997

1997

31 December 1999

Orbiter

Extended Europa Mapping Galileo