September 29
Space Shuttle Discovery Returns to Flight
Space Shuttle Discovery lifted off from Kennedy Space Center on September 29, 1988, ending a 32-month grounding of the U.S. crewed space program after the Challenger disaster.
Summary
The Challenger disaster in January 1986 grounded the shuttle fleet for more than two and a half years while NASA overhauled safety procedures, hardware, and organizational culture. On September 29, 1988, Space Shuttle Discovery lifted off from Kennedy Space Center on mission STS-26, the first crewed flight since the tragedy. An all-veteran crew of five deployed a Tracking and Data Relay Satellite and conducted experiments during the four-day mission. The successful launch and landing on October 3 restored public confidence and marked the resumption of the U.S. manned space program. All crew members wore pressure suits for launch and landing, a precaution reinstated after Challenger.
Context
The Space Shuttle program, operational since Columbia’s first flight in 1981, had become NASA’s primary means of accessing low Earth orbit. The reusable orbiters supported satellite deployments, Spacelab research, and plans for a permanent orbiting laboratory. By late 1985 the fleet had completed two dozen missions, yet the January 1986 loss of Challenger revealed serious weaknesses in the solid rocket booster design and in the agency’s emphasis on maintaining an aggressive launch schedule.
What Happened
Following a comprehensive redesign of the booster joints, new crew escape systems, and revised management procedures, Discovery stood ready on Launch Complex 39B. Its five-member crew—Commander Frederick H. Hauck, Pilot Richard O. Covey, and Mission Specialists John M. Lounge, David C. Hilmers, and George D. Nelson—were all veterans of prior flights. A one-hour, thirty-eight-minute delay for wind conditions and suit-cooling repairs was resolved, and the vehicle lifted off at 11:37 a.m. EDT. Six hours later the crew deployed the TDRS-C satellite atop its Inertial Upper Stage, which carried the spacecraft to geosynchronous orbit. During the four-day mission the astronauts performed eleven mid-deck experiments, tested a voice-recognition unit for operating cameras, and practiced procedures in the newly required pressure suits.
Aftermath
Discovery landed on Runway 17 at Edwards Air Force Base on October 3, 1988, after traveling 1.7 million miles. Post-flight inspection confirmed that the redesigned boosters had performed without leakage or overheating. The mission’s success restored momentum to the shuttle program and cleared the way for STS-27 two months later.
Legacy
STS-26 validated the post-Challenger safety reforms and reopened the path to long-duration operations, including Hubble servicing missions and the assembly of the International Space Station. The requirement for pressure suits on ascent and entry, the all-veteran crew policy, and a stronger safety culture remained hallmarks of the program through its final flight in 2011.
Why It Matters
STS-26 validated extensive post-Challenger reforms and reopened the path to long-duration shuttle operations, including the construction of the International Space Station. It reaffirmed NASA's role in human spaceflight and demonstrated the resilience of the U.S. space program after a major setback.
Related Questions
Why was the shuttle fleet grounded after Challenger?
The loss exposed flaws in the solid rocket booster O-ring seals and in NASA’s safety culture and launch scheduling pressures.
What was the primary payload of STS-26?
The TDRS-C satellite, which became the second operational Tracking and Data Relay Satellite in geosynchronous orbit.
How long did the STS-26 mission last?
Four days, one hour, and eleven seconds, from launch on September 29 to landing on October 3, 1988.
What new safety measures were introduced for this flight?
All crew members wore pressure suits for launch and landing, and the orbiter carried a crew escape system.
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Daily Earth View: Space shuttle launch and return to flight mission
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