Almost four decades went by before the classified recordings were released to the public and the recordings revealed something very unsettling. The three Apollo astronauts had experienced “strange, otherworldly music coming through the Apollo module’s radio while flying above the far side of the moon,” according to the upcoming Science Channel series, NASA’s Unexplained Files.
The conversation between the three astronauts indicated they were hearing sounds they had never heard before:
“It sounds like, you know, outer space-type music.”
“You hear that? That whistling sound? Whooooooooo!”
“Well, that sure is weird music!”
The unexplained transmission lasted around one hour, and before the astronauts regained radio contact with Earth, they discussed whether or not to tell Mission Control what they had experienced:
“It’s unbelievable! You know?”
“Shall we tell them about it?”
“I don’t know. We ought to think about it.”
“The Apollo 10 crew was very used to the kind of noise that they should be hearing. Logic tells me that if there was something recorded on there, then there was something there,” Apollo 15 astronaut Al Worden says on NASA’s Unexplained Files. “NASA would withhold information from the public if they thought it was in the public’s best interest.”
The transcripts of the Apollo 10 mission were classified and untouched in NASA’s archives until 2008. When they were released to the public they started an ongoing debate as to the nature and origin of the strange music sounds heard by the astronauts.