SaturnWorld of RingsThe Machine That Stayed
The Constellation

What stayed · The Machine25

Pioneer 11

What is a first encounter worth?

Recorded

Pioneer 11 approaching pale gold Saturn and thin ice rings in 1979

IllustrationIllustration of first encounter. Not a Pioneer imaging frame.

1 September 1979. The first spacecraft to reach Saturn. A glance can still rewrite a textbook.

1 September 1979. Pioneer 11 is the first spacecraft to reach Saturn. It finds the F ring and a new moon. A flyby is a glance. A glance can still rewrite a textbook.

Why nextTwo Voyagers will turn the glance into a picture with too much detail to ignore.

Mission papers and reductions1
  1. NASA Science. Saturn exploration. Pioneer 11, 1 September 1979; Voyagers 1980–1981. https://science.nasa.gov/saturn/exploration/. Consulted September 3, 2026.Pioneer 11 (1 September 1979), Voyager 1 (November 1980), Voyager 2 (August 1981), Cassini orbiter.