May 25, 2012 12:28 AM
by David S. F. Portree
Marooned in Lunar Orbit (1968)
The Apollo 8 mission to orbit the moon on Christmas Eve 1968 decisively demonstrated U.S. superiority in the Moon Race, but it was also one of the riskiest missions NASA ever flew. Just four days after Apollo 8's safe return to Earth, two engineers studied how long the crew might have survived in lunar orbit if their spacecraft's main engine had failed. Space historian David S. F. Portree describes this chilling might-have-been.
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