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Today's download is a real treat. This is the Apollo 11 descent map, prepared shortly before the historic mission embarked. Note the converging lines towards the optimal landing zone. While Armstrong and Aldrin encountered numerous difficulties during descent- a balky computer among them- this map was the best aid available to predict what lay ahead as they flew towards the surface. Unfortunately, orbital photography was not always the best predictor of actual surface conditions, and interpretation of these images was not an exact science. What greeted the astronauts as they descended was more frightening than what was foreseen, and Armstrong had to hover until he was almost out of fuel to find what he considered a safe anding area. This image is featured as an enclosure in "Missions to the Moon."
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