Space Shuttle Challenger - Sts - 41B Crew Autographs, Memorabilia & Collectibles

Space Shuttle Challenger's STS-41B mission was the tenth flight in NASA's Space Shuttle program and Challenger's fourth flight. The mission launched on February 3, 1984, from Kennedy Space Center, Florida, and concluded on February 11, 1984, marking the first landing at Kennedy Space Center's Shuttle Landing Facility.

STS-41B carried a crew of five astronauts: Vance D. Brand (commander), Robert L. Gibson (pilot), and mission specialists Bruce McCandless II, Ronald E. McNair, and Robert L. Stewart. One of the primary objectives of STS-41B was to conduct the first untethered spacewalks using the Manned Maneuvering Unit (MMU), a backpack-like device that allowed astronauts to move freely in space without any physical connection to the shuttle. This marked a significant milestone in human spaceflight. Astronauts Bruce McCandless II and Robert L. Stewart completed the spacewalks, with McCandless becoming the first human to fly untethered in space.

The mission also aimed to deploy two communications satellites, Westar VI and Palapa B2. Unfortunately, both deployments were unsuccessful due to issues with the Payload Assist Module-D (PAM-D) motors, leaving the satellites in a lower-than-planned orbit. Despite these issues, STS-41B achieved numerous other objectives, including the testing of hardware for satellite refueling and the completion of various science experiments in areas such as astronomy, medicine, and materials science. STS-41B is also notable as it marked the 100th human spaceflight to achieve orbit, counting all spaceflights by all countries starting from Yuri Gagarin's Vostok 1 flight in 1961. It was also the final successful mission for Challenger, which tragically broke apart shortly after launch on the STS-51L mission in January 1986, causing the death of all seven crew members.