The Apollo 11 mission, which first put man on the moon, obviously gets the most press among the numerous Apollo missions. However, the other Apollo missions also had some interesting, and sometimes mysterious results. [Scroll down for video]

Case in point, recently declassified tapes reveal that Apollo 10 astronauts heard a mysterious “music” coming through their radios while they were orbiting the far side of the moon.

Now normally anything like that could be attributed to radio interference from earth. The only problem with that is that when you’re orbiting the moon, and on the far side, you are completely shielded from any broadcasts from earth.

NASA scientists on the ground can’t see or hear the spacecraft, and vice versa.

The sounds was so clear, and so noticeable, that the entire crew discussed it:

“It sounds like, you know, outer space-type music.”

“You hear that? That whistling sound? Whooooooooo!”

“Well, that sure is weird music!”

“It’s unbelievable! You know?”

“Shall we tell them about it?”

“I don’t know. We ought to think about it.”

The contents of the tapes were revealed on a new Science Channel series called “NASA’s Unexplained Files”.