Astronauts In Space Are Creeped Out By Inexplicable Knocking Sound

In 2003, Astronaut Yang Liwei became the first person sent into space by the Chinese Space programme, and orbited the earth a number of times during the 21-hour mission.

In a recent interview with the Chinese media, Yang recalled a strange event which took place onboard the ship. The astronaut remembered hearing odd knocking sounds on the spaceship coming from the outside, but nobody was able to identify what they were. The astronaut described the noise as sounding like a hammer hitting an iron bucket.

Astronaut Yang Liwei on his 2003 space mission, where he heard strange knocking sounds on the outside of his ship. (Credit:

In the interview, Yang said:

“A non-causal situation I have met in space is a knock that appeared from time to time. It neither came from outside nor inside the spaceship, but sounded like someone is knocking the body of the spaceship just as knocking an iron bucket with a wooden hammer.”

The sounds had left Yang feeling nervous, and even on closer inspection, it was impossible to tell what they were. The astronaut moved over to the ship’s porthole to check on the sounds but nothing looked out of the ordinary.

Naturally, the incident has raised a lot of theories, including of course that it may have been aliens attempting to make contact.

The cause of the strange sounds which Yang described as sounding like “knocking an iron bucket with a wooden hammer” has never been identified. (Credit:

Upon returning to earth, he tried to explain the unique noises to officials, and attempted to recreate them with instruments. Weirdly, other Chinese astronauts who have visited space since, also claim to have heard the sounds.

Yang does his best to put their minds at ease by telling them “the sound is a normal phenomenon, so there is no need to worry.”

Easy to say, but what if it really is aliens trying to make contact…

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