OTD…April 25 and the Hubble deploy

Today marks the 40th anniversary — July 20, 1976 — of the first U.S. robotic landing on another planet by the Viking 1 spacecraft on Mars.

#OTD in 2012…Endeavour’s coast-to-coast ferryflight into retirement arrives at Edwards Air Force Base

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