Pioneer 6, 7, 8, And 9
Pioneer 6, 7, 8, and 9 were space probes in the Pioneer program. Together, they formed a series of solar-orbiting, spin-stabilized, solar-cell and battery-powered satellites designed to obtain measurements on a continuing basis of interplanetary phenomena from widely separated points in space. They were also known as Pioneer A, B, C, and D. The fifth (Pioneer E) was lost in a launch accident.
Read more about Pioneer 6, 7, 8, And 9: Purpose, Vehicle Description, Communications, Time Line and Current Status
Famous quotes containing the word pioneer:
“Where the citizen uses a mere sliver or board, the pioneer uses the whole trunk of a tree.”
—Henry David Thoreau (1817–1862)