I spend more about 4h in the museum but you could walk around for days.
The exibition is enormous with focus on planes, the space race, the moon landings, space shuttles, space stations and many many more.
In the entry hal you already can touch a moon rock and you see the original Apollo 11 Command Module Columbia. This was the only partian of the spacecraft (eagle and service module) that returned back to earth together with Neil Armstrong, Buzz Aldrin and Michael Collins.
This is an actual Apollo Lunar Module, one of the 12 built. It was the second LM2 which would be part of Apollo 6 but was not needed as Apollo 5 was very succesfully.
Apollo -Soyuz test project connecting an US and USSR space ship in 1975
Mercury Friendship Space craft bringing the first American in Space. John Glenn was the second man in space after Yoeri Gagarin.
The Hubble Space Telescope Structural Dynamic test Vehicle (SDTV)
This is the actual back up of the primary mirror of the Hubble Space Telescope. In total two identical primary mirrors are built. One in space, one in the Smithsonian.
One of three engines of the Space Shuttle. Also the F-1 Engine from the Saturn rocket is shown. This one of the 5 engines from the Saturn and built in the 70'.
If you have ever the chance to visit Washington DC, make sure you visit the Smithsonian National Space and Air Museum!
