OTD…July 4 and STS-121

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

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.

#OTD in 1983…Challenger lifts off on the first nighttime shuttle launch…and Discovery launches on her inaugural Spaceflight