OTD…Sept. 25 and STS-86

#OTD in 1994…Columbia launched on a Spacelab microgravity flight

#OTD in 2007…NASA’s Dawn probe launched to explore the uncharted worlds of Vesta and Ceres in the heart of the asteroid belt.

#OTD in 1991…Atlantis launched another of NASA’s Tracking and Data Relay Satellites