If you've ever wondered what it's like to live on a hunk of metal orbiting the Earth at hundreds of miles an hour, Col. Chris Hadfield has an answer for you.
Apparently it sounds a lot like a really loud hair dryer.
The Canadian colonel, who's currently in the midst of a six-month stint aboard the International Space Station during which he will become the first Canadian to command a spaceship, sent back an audio clip from the craft. He collected the recording of the ambient background noise within the U.S. lab portion of the craft after being asked by many on Twitter.
As commenters have pointed out, it's a pretty loud existence. But the source of the sound is also what's keeping the astronauts alive and working hard: The noise is largely created by life support systems and the 52 computers controlling all of the space station's systems at any given time.
According to Hadfield, who responded to The Huffington Post via Twitter from the ISS, the sound of all that machinery might be comparable to what it's like being in the womb.
By comparison, spacewalks are rather silent, without the sound of machinery whirring about.
Since there's no air in space, the noise is not created by the movement of the station itself. For the most part, the ISS travels pretty silently through space.
But space itself isn't entirely devoid of sound. While there's nothing audible to the human ear out there, there are sound waves traveling through space, albeit at extremely low frequencies. These sounds can only be heard after being captured by computers and compressed to the audible range. With technology like this, scientists can occasionally hone in on the sounds of cosmic entities, such as black holes or dying stars.