what is the memorial about?
It depicts an astronaut in a spacesuit, intended to commemorate the astronauts and cosmonauts who have died in the advancement of space exploration.
Fallen Astronaut
It is a small stylized figure, meant to depict an astronaut in a spacesuit, intended to commemorate the astronauts and cosmonauts who have died in the advancement of space exploration. 
what is apollo 9? It was a human spaceflight, the third in NASA's Apollo program. who were the crew members? McDivitt, Scott, and Schweickart did they use any call signs? Yes, "Gumdrop", "Spider" etc. where else are such signs used? In broadcasting and radio communications, and railroad stations is this used by military personnel? Yes, tactical call signs is there a book for it? A tactical designator when did the space program mentioned earlier originated? 1969 to 1972 what were some of the launch vehicles that they used? The Saturn series and the Nova series. did this program get any samples in return? Yes, lunar rocks and soil. were these samples sent to any laboratory? Yes, the Lunar Receiving Laboratory in Houston. from where were the samples collected? The Moon what kind of atmosphere can you find on this satellite? An atmosphere so tenuous as to be nearly vacuum. what is the human impact on it? It has inspired permanent installations like the "Moon Museum" art piece, Apollo 11 goodwill messages, Lunar plaque, "Fallen Astronaut" memorial and other artifacts.
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Fallen Astronaut [SEP] Introduction
Fallen Astronaut is a aluminum sculpture created by Paul Van Hoeydonck. It is a small stylized figure, meant to depict an astronaut in a spacesuit, intended to commemorate the astronauts and cosmonauts who have died in the advancement of space exploration. It was commissioned and placed on the Moon by the crew of Apollo 15 at Hadley Rille on August 1, 1971, next to a plaque listing the 14 men known who died. The crew kept the memorial's existence a secret until after completion of their mission. After public disclosure, the National Air and Space Museum requested a replica of the statue.