'Quite a Feeling of Being Alone': 25 Years Since Endeavour's Vanilla-to-Chocolate STS-54 Mission

The base of the Inertial Upper Stage (IUS), carrying the Tracking and Data Relay Satellite, departs Endeavour on 13 January 1993. Photo Credit: NASA, via Joachim Becker/SpaceFacts.de

Twenty-five years ago, this week, the crew of STS-54 settled into orbit for one of the shortest shuttle missions of the decade, tasked with deploying the […]

Ready for Space Station Building: The First 50 Years of Spacewalking (Part 5)

Story Musgrave works at the end of Endeavour’s mechanical arm during activities to service the Hubble Space Telescope (HST) in December 1993. Photo Credit: NASA

Almost a quarter-century ago, in April 1991, the effort to build today’s International Space Station (ISS) got underway with a pair of spacewalks—one unplanned—outside the shuttle Atlantis. During […]

'Vanilla to Chocolate': The Changing Mission of STS-54

The American eagle delivers a fifth star, representing the fifth operational Tracking and Data Relay Satellite (TDRS), in the STS-54 crew patch. Image Credit: NASA

When the STS-54 shuttle crew released their official crew patch in the summer of 1992, they paid tribute to two important payloads aboard their mission. The first was […]