OTD…Sept. 20 and Endeavour retirement

Studying the atmosphere as part of NASA’s Mission to Planet Earth was the objective of shuttle Atlantis’ STS-45 mission in March 1992.

#OTD…In 2009, the final Hubble Space Telescope servicing mission launched

#OTD in 1985…Discovery launched on the first classified space shuttle mission for the Department of Defense. Watch the liftoff: