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STS-51-L was the disastrous 25th mission of NASA's Space Shuttle program and the final flight of Space Shuttle Challenger. It was planned as the first Teacher in Space Project flight in addition to observing Halley's Comet for six days and performing a routine satellite deployment.
Space Shuttle Challenger breaks up during its 1986 launch resulting in the death of all seven crew members. This article lists verifiable spaceflight-related accidents and incidents resulting in human death or serious injury. These include incidents during flight or training for crewed space missions and testing, assembly, preparation, or ...
STS-51-L was the twenty-fifth flight in the American Space Shuttle program, and marked the first time a civilian had flown aboard the Space Shuttle. The mission used Space Shuttle Challenger, which lifted off from launch pad 39B (LC-39B) on January 28, 1986, from Kennedy Space Center, Florida.
Second and last Galileo launch on a Falcon 9 and overall thirteenth launch of Galileo satellites, carrying two satellites. Originally planned to launch on Soyuz ST-B, but scrapped due to geopolitical factors. Then moved to Ariane 6, which was also scrapped due to delays. Europe contracted SpaceX to launch the two pairs aboard Falcon 9. 19 September
In the context of a rocket launch, the "L minus Time" is the physical time before launch, e.g. "L minus 3 minutes and 40 seconds". "T minus Time" is a system to mark points at which actions necessary for the launch are planned - this time stops and starts as various hold points are entered, and so doesn't show the actual time to launch.
Space launch involves liftoff, when a rocket or other space launch vehicle leaves the ground, floating ship or midair aircraft at the start of a flight. Liftoff is of two main types: rocket launch (the current conventional method), and non-rocket spacelaunch (where other forms of propulsion are employed, including airbreathing jet engines).
All flights on the current launch manifest are for the Artemis program, a human spaceflight project aimed at establishing a permanent human presence on the Moon. The flights will launch from the vehicle's dedicated pad at Kennedy Space Center's Launch Complex 39B (LC-39B).
Earlier today, the Mission Management Team extended STS-68 by one day to allow additional science. Endeavour is now expected to land at the Kennedy Space Center at about 10:36 am Tuesday. The orbiter continues to perform well. The only problem reported during the day was the failure of a primary reaction control system jet.