Helios-A Solar Probe At Launch Complex

The Helios-A solar probe launched on Dec. 10, 1974 from Cape Canaveral Air Force Station, Fla. As it looped around the Sun in an orbit that took it from Earth's orbit (1 AU from the Sun) to about 0.3 AU from the Sun and back again, Helios-A studied the solar wind, magnetic and electric fields, cosmic rays, and dust in interplanetary space.

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