STS missions

STS missions
Name	Space Transportation System missions
Caption	Launch of Space Shuttle Columbia on STS-1 (1981)
Country	United States
Operator	National Aeronautics and Space Administration
First	April 12, 1981
Last	July 21, 2011
Vehicles	Space Shuttle fleet: Columbia, Challenger, Discovery, Atlantis, Endeavour
Launches	135

STS missions were the United States Space Transportation System orbital flight operations conducted by the National Aeronautics and Space Administration between 1981 and 2011. The program deployed satellites, conducted scientific research, built and serviced the International Space Station, and tested reusable spacecraft technologies. STS missions involved collaborations with international partners including the European Space Agency, Canadian Space Agency, Japan Aerospace Exploration Agency, and numerous universities and corporations.

Overview

The STS mission series began with STS-1 aboard Columbia and concluded with STS-135 aboard Atlantis, spanning missions that carried crews from the United States and allied nations such as Russia, Germany, France, Japan, Canada, Italy, and Spain. Crews included notable astronauts and cosmonauts like John Young, Robert Crippen, Sally Ride, Mae Jemison, Eileen Collins, John Glenn, Michael Foale, Anatoly Solovyev, and Chris Hadfield. Payloads ranged from communications satellites like Hubble Space Telescope servicing components to scientific laboratories such as Spacelab modules and the Destiny Laboratory Module. Key contractors and facilities included Rockwell International, United Technologies, Boeing, Lockheed Martin, Marshall Space Flight Center, Johnson Space Center, Kennedy Space Center, and Michoud Assembly Facility.

Mission numbering and designation

Early STS missions used a sequential numbering system (e.g., STS-1, STS-2), later supplemented by a fiscal-year and launch-site code structure during the 1980s that produced designations such as STS-41-B and STS-51-L. The fiscal-year system reflected coordination among Kennedy Space Center, Vandenberg Air Force Base, and program management at Johnson Space Center. After the Space Shuttle Challenger disaster and the Columbia disaster, mission designation practices and flight manifest priorities were re-evaluated by panels including the Rogers Commission and the Columbia Accident Investigation Board, influencing return-to-flight missions like STS-26 and STS-114.

Major program milestones and objectives

Primary STS objectives included deploying and repairing space-based observatories such as Hubble Space Telescope, constructing and supplying the International Space Station, and demonstrating reusable spacecraft via the orbiter and external tank. Milestones included the first orbital flight of STS-1 with crew John Young and Robert Crippen, the first American woman in space on STS-7 (Sally Ride), the first African American woman on STS-47 (Mae Jemison), assembly flights like STS-88 (first ISS node connections), and international cooperation through missions carrying Spacelab, Canadarm, and modules from European Space Agency member states. Restoration efforts after disasters led to safety overhauls overseen by NASA leadership figures and advisory bodies such as the White House-appointed review commissions.

Notable missions and incidents

High-profile incidents reshaped STS history: STS-51-L ended with the loss of Challenger and crew including Christa McAuliffe; STS-107 resulted from the loss of Columbia on reentry with crew including Rick Husband and Ilan Ramon. Successful high-visibility missions included STS-31 which deployed Hubble Space Telescope with crew Loren Shriver and Charles Bolden, STS-61 which performed the first servicing of Hubble led by Kenneth Bowersox and Richard Covey, and STS-135 which completed the program with crew including Chris Ferguson and Douglas Hurley. Other notable flights: STS-41, STS-41-C, STS-51-I, STS-61-C, STS-82, STS-95 (return to flight of John Glenn), STS-103, STS-114 (return-to-flight after Columbia), and assembly milestones like STS-97, STS-100, STS-120, and STS-123.

Vehicle and crew systems used in STS missions

Orbiters—Columbia, Challenger, Discovery, Atlantis, Endeavour—used systems including the RS-25 engines, SRBs, Orbiter Maneuvering System, and the Thermal Protection System of reinforced carbon-carbon and silica tiles. Crew survival and flight systems integrated avionics from contractors like IBM partners and maintenance at Palmdale, with crew training at Johnson Space Center and mission control at Mission Control Center. Robotic systems such as the Canadarm (Shuttle Remote Manipulator System) and its successor, Canadarm2, supported payload handling and ISS assembly alongside extravehicular activity suits like the Extravehicular Mobility Unit used by spacewalkers such as Bruce McCandless II and Robert L. Stewart.

Science, payloads, and contributions

STS missions carried diverse payloads: observatories like Hubble Space Telescope, scientific laboratories like Spacelab, life-science investigations involving researchers from Massachusetts Institute of Technology, Stanford University, University of California, Berkeley, Johns Hopkins University, and pharmaceutical experiments sponsored by companies such as Merck and Bristol-Myers Squibb. Communications and Earth-observation satellites included deployments by AT&T, Intelsat, Eutelsat, and experiments by National Oceanic and Atmospheric Administration and United States Geological Survey. Support for the International Space Station involved modules like Unity (ISS module), Zarya, Zvezda, Destiny, Columbus, and Kibo, enabling long-duration research by crewmembers from European Space Agency, Japan Aerospace Exploration Agency, Canadian Space Agency, and Roscosmos.

Legacy and impact on human spaceflight

The STS mission series left a mixed legacy: it advanced reusable spacecraft concepts pursued by entities like SpaceX, Blue Origin, Sierra Nevada Corporation, and informed NASA programs such as Orion and Commercial Crew Program. Lessons from accidents influenced safety culture across agencies including Federal Aviation Administration oversight and international partners. Technological spinoffs affected industry sectors including composites and avionics used by Boeing, Lockheed Martin, and Northrop Grumman. The program trained generations of astronauts who later flew on Soyuz and commercial vehicles, and its contributions to orbital infrastructure enabled continuous human presence aboard the International Space Station and ongoing scientific collaborations across institutions like Caltech, MIT, Harvard University, and Imperial College London.

Category:NASA missions