The Juno spacecraft has gotten a private radio show from Jupiter's closest moon, the highly volcanic Io.
NASA's Juno spacecraft is "listening" in on radio emissions from Jupiter's volcanic moon Io, allowing researchers to discover what triggers the strange radio waves.
Of all the planets in our solar system, Jupiter has the largest and most powerful magnetic field, which extends so far that some of the planet's moons orbit within it. Because Io is closest to the planet, the moon is "caught in a gravitational tug-of-war" between Jupiter and two other large moons, according to NASA. These opposing pulls cause massive internal heat, which has led to hundreds of volcanic eruptions across the moon's surface.
The volcanos release 1 ton of gasses and particles per second into space, NASA said in a statement. Some of this material splits into electrically charged ions and electrons that then rain down onto Jupiter through the planet's magnetic field. Electrons caught in the magnetic field are accelerated toward Jupiter's poles and, along the way, generate a phenomenon scientists call decameter radio waves (also known as decametric radio emissions, or DAM).
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