STS-41-B was NASA's tenth Space Shuttle mission and the fourth flight of the Space Shuttle Challenger. It launched on February 3, 1984 and landed on February 11, 1984, after deploying two communications satellites. It was also notable for including the first untethered spacewalk.
Key Facts
| Subject | STS-41-B |
| Category | 1984 American crewed spaceflight |
| Reading time | 1 min · Intermediate |
| Key date | 1984 |
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