Multiple choice

Which Orbiter was used for the first untethered space walks carried out using the Manned Maneuvering Unit (MMU)?

  1. Altlantis 112

  2. Discovery

  3. Challenger

  4. Endeavor
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The first untethered spacewalks using the Manned Maneuvering Unit occurred during the STS-41B mission, which was flown by the Space Shuttle Challenger.

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