Juno was able to track radio waves caused by Jupiter's volcanic moon

The researchers explained that Jupiter has the largest and most powerful magnetic field of all the planetsOur

The strength of its source is about 20,000 times stronger than Earth's.It is exposed to the solar wind, a stream of electrically charged particles and magnetic fields constantly emanating fromSun.

Jupiter has several large moons that orbit within its massive magnetic field, Io being the closest of them. Its volcanoes collectively ejectSome of this material breaks down into electrically charged ions and electrons and is quickly captured by Jupiter's magnetic field.As Jupiter's magnetic field sweeps past Io, electrons from the moon accelerate along the magnetic field toward Jupiter's poles.Along the way, these electrons generate radio waves.Juno Waves can "listen" to this radio emission and interpret it.

As it turned out, the radio waves are coming from a sourcealong the walls of a hollow cone aligned and controlled by the strength and shape of Jupiter's magnetic field. Juno only receives a signal when Jupiter's rotation engulfs this cone above the spacecraft.

Juno's data allowed the team to calculate thatthe energy of the electrons that generate radio waves is much higher than previously thought - about 23 times. Also, electrons don't have to come from a volcanic moon. For example, they can be in the magnetic field of the planet (magnetosphere) or come from the Sun as part of the solar wind.

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