---
title: "Juno Spacecraft Records Jupiter’s “Roar” as it Enters the Planet’s Magnetic Field"
description: "NASA's Juno spacecraft recorded roaring sounds from Jupiter's magnetosphere. The sounds were due to the bow shock produced when the spacecraft entered the planet's magnetic field."
date: "2016-07-05"
modified: "2016-07-05"
authors:
  - name: "Arra Dianne Hifarva"
    link: "https://futurism.com/authors/arrahifarva"
url: "https://futurism.com/juno-spacecraft-records-jupiters-roar-as-it-enters-the-planets-magnetic-field"
categories:
  - "Off-World"
  - "Space"
tags:
  - "bow shock"
  - "Juno"
  - "jupiter"
  - "sonic boom"
---

# Juno Spacecraft Records Jupiter’s “Roar” as it Enters the Planet’s Magnetic Field

![](<https://futurism.com/wp-content/uploads/2016/07/A-NASA.jpg>)
*\<em\>Image: \<a href="http://www.sciencealert.com/" target="\_blank"\>NASA\</a\>\</em\>*

NASA's [Juno spacecraft](<https://futurism.com/nasa-juno-spacecraft-to-arrive-at-jupiter-today>) entered Jupiter's orbit last night. On its way there, though, the craft was able to record some interesting sounds that seem to belong on the [*2001: A Space Odyssey*](<https://www.youtube.com/watch?v=HhwWAciO6F4>) soundtrack. [Many articles](<http://www.sciencealert.com/the-juno-spacecraft-just-recorded-these-creepy-sounds-around-jupiter>) are describing the sound as a "creepy" roar. While this descriptor is pretty accurate, the sounds are actually easily explained (spoiler: [its still not aliens](<https://futurism.com/outer-spacey-music-heard-apollo-10-astronauts-not-aliens>)).

The noise is actually the '[bow shock](<http://www.windows2universe.org/glossary/bow_shock.html>)' caused by the spacecraft's entry into the planet's magnetic field that protects the planet from solar winds. You can hear it in the video from NASA below:

https://www.youtube.com/watch?v=8CT_txWEo5I

When supersonic solar winds are suddenly slowed down and heated up as they plough into [the gas giant's magnetosphere](<http://csep10.phys.utk.edu/astr161/lect/jupiter/magnetic.html>), they produce a bow shock. This is comparable to the sonic boom produced when an aircraft goes faster than the speed of sound on Earth. The compression waves produced combine to form a shockwave.

The eerie-sounding recording lasted for around 2 hours, which is a great feat considering that the spacecraft is traveling at the speed of 241,000 km/h (150,000 mph).

Who knows what other sounds we are missing when our spacecraft aren't around to capture the noises of the universe.