Soaring to the depths of our universe, gallant spacecraft roam the cosmos, snapping images of celestial wonders. Some spacecraft have instruments capable of capturing radio emissions. When scientists convert these to sound waves, the results are eerie to hear. In time for Halloween, we've put together a compilation of elusive "sounds" of howling planets and whistling helium that is sure to make your skin crawl.
Cassini Near Jupiter
NASA
Hear intriguing radio waves that NASA's Cassini spacecraft collected near Jupiter in January 2001.
Voyager 2 and the Ghostly Planetary Plasma
NASA
Listen closely to hear ghostly planetary plasma waves collected by NASA's Voyager 2.
Ultra-Cold Liquid Helium-3 Whistle
NASA
If you're squeamish, you may not want to listen to the strange whistle of ultra-cold liquid helium-3 that changes volume relative to the North Pole and Earth's rotation.