NASA has made public a recording of strange "music" that astronauts reported hearing in 1969 while on the way facet of the Moon, out of radio contact with the world.
The story behind these uncommon whistling noises was showcased on Sunday night in a show by the channel Discovery.
The noises reportedly were detected in May 1969 by the Apollo 10 astronauts as they circled the Moon, months before the primary astronauts stepped foot on the satellite surface on July 21 that very same year.
The three astronauts on board were Thomas Stafford, John Young and Eugene Cernan.
The sounds, that lasted about an hour, were recorded and transmitted to mission control in Houston. A transcript of the text was released in 2008, however the particular audio has barely been made public.
"You hear that? That whistling sound?" asks Mr Cernan, describing it as "outer-space-type music."
The trio felt the sounds were so strange that they debated whether or not to tell the chiefs at the National Aeronautics and Space Administration, for fear they would not be taken seriously and will be dropped from future space missions.
NASA says the sounds couldn't have been alien music. An engineer from the US space agency aforementioned the noises likely came from interference caused by radios that were near one another in the lunar module and the command module.
Astronaut Al Worden, who flew on Apollo 15, disputed that explanation, stating "logic tells me that if there was something recorded on there, then there's something there.".
But Michael Collins, the pilot of Apollo 11, who became the first person to fly round the other side of the Moon by himself, whereas Buzz Aldrin and Neil Armstrong were walking on the surface, said he too detected "an eerie woo-woo sound" but accepted the reason of radio interference.
In fact, he'd been warned prior time, he wrote in his book, Carrying the Fire: an Astronaut's Journeys.
"Had I not been warned about it, it would have scared the hell out of me," he wrote.
"Fortunately the radio technicians (rather than the UFO fans) had a ready explanation for it: it was an interference between the LM's and Command Module's VHF radios."
Let us hope that we could get a friendly neighborhood soon.
