An Adudio From NASA's Juno Mission

On September 29, 2022, NASA’s Juno spacecraft made a close flyby of Jupiter’s icy moon Europa, at a distance of approximately 218 miles (350 kilometers). With a relative velocity of about 14.7 miles per second (23.6 kilometers per second), the Juno spacecraft only had a few minutes to collect data and images during its close flyby of Europa.

In this video, measurements by Juno’s Waves instrument during the flyby have been converted to an audible frequency. As the white line moves across the spectrogram, which is a visual way of representing signal strength over time, one can hear the variation of frequency of the plasma waves observed near Europa as the plasma density varies. The video shows data collected over approximately 1.5 hours during the event. Time is indicated along the x-axis, and is shown in Coordinated Universal Time, which is the world-wide scientific standard of timekeeping.