sts no load 2021

STS-29 was the 28th NASA Space Shuttle mission, during which Space Shuttle Discovery inserted a Tracking and Data Relay Satellite (TDRS) into Earth orbit. It was the third shuttle mission following the Challenger disaster in 1986, and launched from Kennedy Space Center, Florida, on 13 March 1989. STS-29R was the eighth flight of Discovery and the 28th Space Shuttle mission overall; its planned predecessor, STS-28, was delayed until August 1989.
The mission was technically designated STS-29R as the original STS-29 designator belonged to STS-61-A, the 22nd Space Shuttle mission. Official documentation and paperwork for that mission contained the designator STS-29 when it was allocated to Space Shuttle Columbia and later as STS-30 when allocated to Challenger. As STS-51-L was designated STS-33, future flights with the STS-26 through STS-33 designators would require the R in their documentation to avoid conflicts in tracking data from one mission to another.

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