Apollo 10 astronauts heard weird sounds during their trip around the moon.
The music was heard during the mission when astronauts Thomas P. Stafford, Gene Cernan, and John Young were on the far side of the moon.
The transcripts of the 1969 mission, which were first released in 1998, show how the astronauts reacted, all three astronauts spoke about the music intermittently during the mission, while they were doing other tasks.
Cernan says: “That music even sounds outer-spacey, doesn’t it? You hear that? That whistling sound?” He later describes it as “weird music” and “eerie”.