This button and ribbon celebrate the Apollo 11 lunar landing on July 20, 1969. On that date, NASA astronauts Neil Armstrong and Edwin "Buzz" Aldrin walked on the Moon's surface while Michael Collins orbited above in the command module. Buttons like this one were sold and collected as souvenirs of the event. Timothy Connelly donated this button and ribbon collected by his father, an avid button collector, to the National Collection in 2005.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.