Some of the plumbing for the J-2 rocket engine on display as a giant lawn ornament at Johnson Space Center. The engine produces as much as 230,000 pounds of thrust and burns liquid oxygen and liquid hydrogen -- the first liquid hydrogen engine used on a manned space mission. Five of these engines powered the second stage of the Saturn V rocket (used to send men to the moon), while a single J-2 powered the third stage. It was the third stage that actually put the astronauts on a lunar trajectory.

Submitted for last week's Photo Friday topic, Plastic, because it was taken with a plastic camera. ;)

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