NASA
It's deathly quiet in the vacuum of space, save only for the faint whisper of gravitational waves.
However, space scientists sometimes take signals from beyond the mortal realm of human senses - including radio waves, plasma waves, and magnetic fields - and convert them into audio tracks.
This clever hack is called data sonification, and it helps researchers "hear" what's going on with their far-flung spacecraft around planets, moons, comets, and other locations.
The results are often ear-splitting, but sometimes the audio is downright scary.
Just in time for Halloween, NASA on Thursday released a compilation of 22 outer-space sounds "that is sure to make your skin crawl," the space agency said in a release.
Here are a handful of the spookiest tracks and what they represent.