Q. Consider the following astronauts:

1. Sunita Williams
2. Chiaki Mukai
3. Yvonne Cagle
4. Peggy Whitson

Which of the above astronauts have participated in more than one space mission?
Answer: Only 1, 2, and 4
Notes: Sunita Williams has participated in two spaceflights, logging over 322 days in space. Chiaki Mukai flew on two Space Shuttle missions (STS-65 and STS-95). Peggy Whitson has also completed multiple missions, including two long-duration stays aboard the ISS. Yvonne Cagle has not flown in space, and thus does not meet the criteria of having participated in more than one space mission.