Knocking In Space? 😱😰

Added: 2026-05-28

[00:00:00]If you heard tapping in your spaceship, would you freak out or grab a wrench?

[00:00:03]Either way, [music] you're not alone. Quick science. In space, there's no air, so no sound usually, but vibrations travel through solid stuff like a spacecraft [music] hull, an antenna, a satellite panel.

[00:00:14]Those knocks come from thermal expansion, micrometeoroid hits, mechanical systems shifting as things heat and cool. [music] Mission control hears the vibration through instruments and turns it into audio so astronauts can [music] listen.

[00:00:26]Sometimes it's nothing. Sometimes it's a weird clue. So next [music] time you hear a knock in space, it's not ghosts.

[00:00:32]It's physics being dramatic. Curious?

[00:00:35]Follow for more space mysteries.