Pioneer 11

Pioneer 11 was an American Pioneer Program deep space probe that was in service with NASA in the late 20th century. The probe surveyed the planet Saturn.

The probe was launched from Earth in 1973. Six years later, in 1979, it became the first Human spacecraft to visit Saturn. During its survey of the giant planet, the probe discovered that Saturn had a magnetic field and a magnetosphere. These results added to knowledge acquired about these giant planets by its sister probe, Pioneer 10, when it surveyed Jupiter.

Information on this probe was included in the Context Indices when Data was reviewing the file on the non-verbal language (gestural) M-9.