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The Apollo 10 mission was just like a lunar landing mission—but without the landing. Crew members, from left, are Gene Cernan, John Young and Thomas Stafford. They launched on May 18, 1969, made 31 orbits of the moon and splashed down in the Pacific on May 26. Via CNN.com

Back in 2008, NASA released transcripts of a discussion between two astronauts, John Young and Brother Eugene Cernan ’56, about outer-space-type music coming from the far side of the moon. Just this past month, NASA released a recording of these sounds to the public.

“According to a new Science Channel series "NASA's Unexplained Files," the sounds were so weird that the team debated whether or not to mention it to their superiors at NASA, out of fear that it could cast doubt on their suitability for future spaceflight.

"I don't remember that incident exciting me enough to take it seriously. It was probably just radio interference. Had we thought it was something other than that we would have briefed everyone after the flight. "We never gave it another thought," Cernan said.

A NASA technician supports Cernan’s theory that the radios could have been interfering with each other, but astronaut Al Worden firmly believes that if something was recorded, then there was something there.

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