Science: Sailing to Halley's Comet

Long before the invention of the rocket, man dreamed of hoisting sail and traveling through space in wind-blown ships. In The True History, a tale written in the 2nd century A.D. by the satirist and onetime lawyer, Lucian of Samosata, a ship with a 50-man crew is caught in an Atlantic storm, carried aloft and sent, sail billowing, on a journey to the moon. Later storytellers launched ships with sails on even more fanciful space trips. But none of these fictional voyages was as remarkable as the mission now being planned for NASA by...

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