There hasn't been a scientist who has flown to the moon. The first humans to land on the moon were astronauts, not scientists, specifically:

* Neil Armstrong (Commander of Apollo 11)

* Buzz Aldrin (Lunar Module Pilot of Apollo 11)

It's important to differentiate between astronauts and scientists. While many astronauts have scientific backgrounds, their primary role is to operate spacecraft and conduct experiments in space. Scientists, on the other hand, primarily conduct research and analysis.