Creepy but true space incidents part 2!
In 1969, the Apollo 10 astronauts orbited the moon, as a test-run for the Apollo 11 mission. While they flew around the far side of the moon, which put them out of radio contact with Earth, they heard some strange sounds. The entire transcript, of their conversation, was initially classified by NASA, and only released from NASA’s archives, in 2008. But the actual recording of the noise was still kept under wraps, until 2016.