OTD…Jan. 27 and Apollo 1

#OTD in 2001…Atlantis launched the Quest airlock module to the International Space Station

The first crew to inhabit Skylab — Conrad, Weitz and Kerwin — launched today in 1973 for a 28-day mission that successfully made critical repairs, brought the station into operation and conducted solar astronomy, Earth resources and medical experiments.

#OTD in 1999…Columbia launched with the first woman commander and the Chandra X-ray Observatory