Astronauts have seen some truly creepy things out in space! One time, a crew on the Apollo 10 mission heard strange, "outer space music" while orbiting the Moon, and it gave them chills. Then there are unexplained flashes of light that astronauts on the International Space Station (ISS) report seeing, even with their eyes closed—scientists think they might be cosmic rays zipping through their retinas! Another eerie moment came when Chris Hadfield, a famous astronaut, once saw what looked like a flying object outside the ISS—but it turned out to be a chunk of frozen liquid. Still, some astronauts report seeing things that just can’t be explained, like moving lights or objects. Animation is created by Bright Side.