OTD…Sept. 20 and Endeavour retirement

#OTD…Launch of Columbia in 1993 on the second flight of the German Spacelab

#OTD in 2000…Atlantis launched on a mission to make the International Space Station a home in orbit

NASA’s Kepler planet-finder began its mission to discover Earth-like worlds orbiting other stars in the galaxy today in 2009, successfully launching aboard a Delta 2 rocket from Cape Canaveral.