Swipe Down and Turn Up the Sound to Hear the Full Experience.Space is often described as silent. With no atmosphere to carry sound waves, there is nothing for vibrations to travel through like they do on Earth. So how can NASA claim to have recorded the eerie sounds of black holes, dying stars, and even entire planets?The answer lies in a technique called sonification, where scientific data collected by spacecraft is converted into sounds humans can hear. While these recordings are not traditional audio, they reveal an astonishing hidden soundtrack created by electromagnetic waves, plasma vibrations, and pressure waves throughout the universe.Among the most unsettling is the “voice” of a supermassive black hole at the center of the Perseus galaxy cluster. Surrounded by an enormous cloud of hot gas, this black hole generates pressure waves that ripple through the surrounding material. Those waves are about 57 octaves below the range of human hearing, so NASA shifted them upward, producing a haunting low groan unlike anything heard on Earth.Another chilling recording comes from WR124, a massive Wolf-Rayet star located about 28,000 light years away. Nearing the end of its life, the star is expected to explode as a supernova before collapsing into a black hole. Scientists combined X-ray observations from NASA’s Chandra X-ray Observatory with infrared data from the James Webb Space Telescope, Herschel, Spitzer, and WISE to create a dramatic musical representation. High pitched tones represent the star’s blazing core, while flutes, strings, and bells symbolize expanding gas clouds and nearby stars.Not every eerie sound comes from dying stars. In 2014, the European Space Agency’s Rosetta spacecraft detected strange vibrations surrounding Comet 67P. The probe measured oscillations in the comet’s magnetic field that were far below the range of human hearing. After increasing the frequency, scientists revealed an eerie whistle that earned the comet its nickname, the “singing comet.”The Voyager missions have also captured some of the strangest sounds ever associated with space. As Voyager 1 and Voyager 2 traveled through the Solar System, their plasma wave instruments recorded electromagnetic vibrations near planets such as Jupiter and Uranus. Jupiter produced harsh, screeching bursts generated by its enormous magnetic field, while Uranus revealed unusual signals created by dust striking its rings and plasma moving through its magnetosphere.Voyager 1 later became the first human made object to enter interstellar space. There, it detected plasma waves traveling through the thin gas between the stars. When converted into sound, these vibrations create an unsettling hum that seems more fitting for a science fiction film than the emptiness of space.NASA’s Cassini spacecraft added even more unusual recordings during its mission to Saturn. It detected powerful radio emissions linked to the planet’s spectacular auroras and even captured the sound of tiny ring particles striking the spacecraft as it flew through the gap between Saturn and its rings.Even Earth has its own surprising soundtrack. Using data collected by the European Space Agency’s Swarm satellites, scientists transformed measurements of Earth’s magnetic field into an eerie recording filled with deep rumbles and ghostly echoes. The most dramatic portions were based on a powerful geomagnetic storm caused by a solar flare, revealing what happens when charged particles from the Sun collide with our planet’s magnetic shield.Perhaps the most remarkable sound of all comes from two black holes colliding more than a billion light years away. In 2015, the LIGO observatory detected gravitational waves created when two enormous black holes merged into one. Those ripples in space time were converted into a brief rising chirp, allowing humanity to hear the first direct evidence of a black hole collision.Although space itself remains silent, the universe is far from quiet. By transforming invisible waves and cosmic vibrations into sound, NASA has revealed an astonishing collection of eerie recordings that let us experience the hidden soundtrack of the cosmos in a completely new way.