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Solar System Exploration
Pioneer 9
Missions to Our Solar System
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Pioneer 9
Pioneer 9 Mission to Our Solar System

Goals: Pioneer 9 was the fourth in a series of solar orbiters designed to study, from widely separated points in space on a continuing basis, interplanetary phenomena such as the Sun's magnetic field, the solar wind and solar and galactic cosmic rays.

Accomplishments: Pioneer 9 gathered valuable data on the properties of the solar wind, cosmic rays and interplanetary magnetic fields. In conjunction with Pioneers 6, 7, and 8, the spacecraft formed a ring of solar-weather stations, spaced approximately along Earth's orbit.

pinstabilized spacecraft obtained valuable data on the properties of the solar wind, cosmic rays, and interplanetary magnetic fields.

Key Dates
8 Nov 1968:  Launch
Status: Successful
Fast Facts
Pioneer 9 Facts Pioneers 6,7,8, and 9 were the world's first solar monitoring network.

NASA maintained contact with Pioneer 9 until May 1983.

Mission controllers used SETI equipment to try to contact Pioneer 9 in 1987, but were unsuccessful. The mission was then declared inactive.
People Spotlight
Charles Hall Charles Hall
"Charlie Hall's Pioneer 10 craft may be billions of miles from Earth, but his spirit will always be with us at NASA." Read More...
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Last Updated: 1 Dec 2010