OTD…Jan. 22 and STS-42

#OTD in 2005…Discovery launched on the first space shuttle mission after the Columbia tragedy

#OTD…Launch of Challenger in 1985 on a Spacelab research flight

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.