page_title: STS-42
section_title: Mission highlights
hierarchical_section_title: STS-42 / Mission highlights
caption_attribution_description: English: STS-42 Discovery, Orbiter Vehicle (OV) 103, lifts off from a Kennedy Space Center (KSC) Launch Complex (LC) Pad at 9:52:33 am (Eastern Standard Time (EST)). OV-103, riding atop the external tank (ET) and flanked by two solid rocket boosters (SRBs), is clears the fixed service structure (FSS) tower. The retracted rotating service structure (RSS) appears in the foreground. An exhaust cloud fills the launch pad area.
context_page_description: STS-42 was a Space Shuttle Discovery mission with the Spacelab module. Liftoff was originally scheduled for 8:45 EST 22 January 1992, but the launch was delayed due to weather constraints. Discovery successfully lifted off an hour later at 9:52 EST. The main goal of the mission was to study the effects of microgravity on a variety of organisms. The shuttle landed at 8:07 PST on 30 January 1992 on Runway 22, Edwards Air Force Base, California.
  STS-42 was the first of two flights in 1992 of Discovery, the second of which occurred during STS-53, which launched on 2 December 1992. The mission was also the last mission of the Space Shuttle Discovery to have a seven-member crew until STS-82, which was launched on 11 February 1997.
context_section_description: STS-42 was launched on 22 January 1992, 9:52:33 am EST. The launch was delayed by one hour due to weather constraints. The launch weight was 243,396 pounds (110,403 kg).
  Discovery carried into orbit the International Microgravity Laboratory-1 (IML-1), a pressurized crewed Spacelab module, to explore in depth the complex effects of weightlessness on living organisms and materials processing. The international crew, divided into Red and Blue teams, conducted experiments on the human nervous system's adaptation to low gravity and the effects of microgravity on other life forms such as shrimp eggs, lentil seedlings, fruit fly eggs and bacteria. Low gravity materials processing experiments included crystal growth from a variety of substances such as enzymes, mercury iodine and a virus. Other payloads included 10 Get Away Special (GAS) canisters, a number of middeck payloads, two Shuttle Student Involvement Program (SSIP) experiments, and an Australian developed ultraviolet telescope Endeavour. Middeck payloads included Gelation of SOLS: Applied Microgravity Research (GOSAMR), Investigations into Polymer Membrane Processing (IPMP) and the Radiation Monitoring Experiment (RME-III).
  The mission landed on 30 January 1992, 8:07:17 am PST, Runway 22, Edwards Air Force Base, CA., after being extended by a day for continued scientific experimentation. The rollout distance was 9,811 feet. The orbiter returned to Kennedy Space Center on 16 February 1992. The landing weight was  218,016 pounds (98,890 kg).
caption: Discovery lifts off at the start of STS-42.
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