The two companion spacecraft Pioneers 10 and 11 were launched in 1972 and 1973, respectively. They passed through the asteroid belt between Mars and Jupiter without damage, made the first-ever investigations at close range of the great outer planets Jupiter and Saturn and are now on escape trajectories out of the solar system.

Pioneer History

• Pioneer Odyssey from the NASA History Division
• Pioneer 11 Animation and Archive Footage
• Pioneer 10 Silver Anniversary (1997)
• A Lone Pioneer Paved the Way Past Saturn
• Pioneer 10 Status, February 1998
• Termination of Pioneer 10's Mission, February 2003
• The Passing of a True Pioneer: Professor James A. Van Allen, August 9, 2006

GTT Charged Particles Experiment

• Science Background
• Geiger Tube Telescope
• Investigators
• Observations
  • Jupiter
  • Saturn
  • Solar Wind
• Publications
• Access to Data

More Pioneer Information

• NASA Pioneer Project Page
• Other Experiments
• The Pioneer 10 Plaque
• Coordinated Heliospheric Observations Data (COHOWeb at NSSDC)
• Heliocentric Trajectories for Selected Spacecraft, Planets, Comets
• PDS Planetary Plasma Interactions - Outer Planets Subnode

Other Web Resources

• Space Physics Research in the Department of Physics & Astronomy