Real sounds from the dark side of the moon are way more haunting than anything ever recorded by Pink Floyd.

Astronauts on 1969’s Apollo 10 mission heard strange “music” while passing over the far side of the moon, where communication with Earth is cut off, newly released audiotapes reveal.

The crew — Thomas Stafford, John Young and Eugene Cernan — was taking one of its 31 turns around the moon when whizzing and whistling sounds unlike anything they had ever heard filled the spacecraft.

“You hear that? That whistling sound?” one of the men is heard asking before mimicking the eerie noise: “Whooooooooo!”

“That music even sounds outerspacy, doesn’t it?” he says.

“That sure is weird music,” another says.

The men continued to remark on the noise for the next hour before the craft rounded to the Earth-facing side of the moon.

The tape, among reams of Apollo mission data declassified in 2008, is being revealed on the upcoming Science Channel series “NASA’s Unexplained Files.”

Retired Apollo 15 astronaut Al Worden tells the series that the celestial symphony would have been enough to spook even the most veteran spaceman.

“If I were to hear something back there . . . it would freak me out,” he admits in a preview of the documentary series’ third season, which begins airing on Tuesday.

“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.”

Launched in May 1969, Apollo 10 was the second manned mission to orbit the moon and was a dress rehearsal for the first lunar landing three months later.

Experts in the preview don’t name a source of the tunes, which predated Pink Floyd’s “Dark Side of the Moon” — the band’s eighth studio album — by four years.