Science: Gliding, Gliding

The space ships of the future will not roar through the solar system, pushed by the blazing force of their atomic engines. Instead, they will coast in graceful curves, riding gravitational pulls as a glider rides the upward currents in the air. So thinks red-haired Professor (of astronomy) Samuel Herrick, 35, of the University of California at Los Angeles. Last week he was teaching an eight-man, two-girl class the delicate art of interplanetary gliding.

To clear the earth with speed to spare, says Professor Herrick, a space ship should start at 8 miles per second....

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