A NASA astronaut aboard the International Space Station (ISS) reported hearing a “strange noise” coming from the Boeing CST-100 Starliner spacecraft, shortly before its scheduled autopilot return to Earth. 

Astronaut Butch Wilmore recorded the noise and sent it to Mission Control at Johnson Space Center in Houston on August 31, 2024, claiming that he had heard a “strange noise coming through the speaker”.  

On the recording, which was shared on YouTube on September 1, 2024, a pulsating sound emanating at steady intervals can be heard coming from the Starliner’s speaker system.  

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