The astronauts who flew the dress rehearsal for the first lunar landing reported hearing mysterious “outer space-type music” while flying behind the moon in May 1969.
The case of the odd, unexplained whistling noise is uncovered during an upcoming episode of the Science Channel series, “NASA’s Unexplained Files.” The episode focuses on a strange event experienced by the crew members of Apollo 10, a mission which flew to the moon, entered lunar orbit and got within 5,000 feet of the moon’s surface in preparation for Apollo 11’s historic flight two months later.
The Apollo 10 astronauts – Tom Stafford, John Young and Eugene Cernan – can be heard on recordings from the flight talking about the strange sound, and whether to tell NASA about it.
“It sounds like, you know, outer space-type music,” one of the astronauts says.
“Shall we tell [NASA] about it?” an astronaut asks.
“I don’t know,” another replies. “We ought to think about it.”
There’s no record of the astronauts discussing the noise with NASA or with the public.