Entrance and parking is NO LONGER available for free to this building - visiting via the Space Center Houston tram tour is now your only option. Check the Space Center Houston website for operating hours, which do vary.
Inside the building at Rocket Park is one of three Saturn V rockets on display in the world. This particular Saturn V is the only one comprised of all flight-certified hardware and would have been used to launch astronauts to land on the moon. The rocket is laying on its side and has been separated into the stages that it would jettison as it used up the fuel inside each section.
When fully fueled, the Saturn V would weigh over 6 million pounds. The first, and largest stage, contained five F-1 engines and was only operational for a little over 2.5 minutes before separating and falling into the ocean. The second stage fired for around nine minutes and got the astronauts into space. It burned up reentering Earth's atmosphere. The third stage fired for about three hours and placed the crew (and itself) on a trajectory to the moon. Some of these used up stages were targeted to impact the moon to create a moonquake - useful to help determine its interior structure.
In order to log this virtual cache, you need to look carefully at each of the eleven photos below. There is a green box inside each photo which is covering up some letters. Find the right Letter, from the right Word, from the right Photo to solve the puzzle below. You'll need to email me the answer, as well as what the answer has to do with the Saturn V rocket, BEFORE logging your find on this virtual. A picture of your visit is not needed and does not count as a successful find.
[P7 W2 L5] [P2 W3 L3] [P11 W2 L3] [P7 W1 L5] [P1 W1 L1] [P5 W3 L4] [P4 W1 L2] [P5 W1 L1]
[P2 W4 L2] [P3 W1 L5] [P9 W1 L1] [P6 W2 L3] [P10 W4 L4] [P10 W1 L6] [P8 W1 L1]

Virtual Reward - 2017/2018
This Virtual Cache is part of a limited release of Virtuals created between August 24, 2017 and August 24, 2018. Only 4,000 cache owners were given the opportunity to hide a Virtual Cache. Learn more about Virtual Rewards on the Geocaching Blog.