Juno measured Jupiter's magnetic field for the first time, finding it far more powerful than scientists expected. Jupiter's magnetic field is 10 times more powerful than the strongest field on Earth.
A mass of swirling clouds and storms on Jupiter.
NASA/SwRI/MSSS/Gerald Eichstädt/Seán Doran
A year after its arrival, Juno zipped past Jupiter's Great Red Spot, a raging storm near the planet's equator. It discovered that this cyclone goes 200 miles deep — that's 50 to 100 times as deep as Earth's oceans.
Scientists animated this Juno image of the Great Red Spot based on velocity data from the spacecraft and models of the storm's winds.
Cyclones spin in the same direction as the planet, but anticyclones spin in the opposite direction. Both are found all over Jupiter, in varying sizes.
A white anticyclone swirls on Jupiter's surface.
NASA/SwRI/MSSS/Kevin M. Gill (CC BY 2.0)
Juno has also spotted the aurora ribboning across Jupiter's south pole. They’re like auroras on Earth, but hundreds of times more powerful and, unlike other planets' auroras, emit powerful X-rays.
Jupiter's southern aurora in infrared.
NASA/JPL-Caltech/SwRI/ASI/INAF/JIRAM
The spacecraft captured the shadow of Jupiter's icy satellite Ganymede, the largest moon in the solar system.
Ganymede (right) casts a shadow on Jupiter's surface (left).
Citizen scientist Gerald Eichstädt compiled Juno's imagery into a time-lapse video of its June flyby, which took the spacecraft past Jupiter and Ganymede.
During its 53rd close flyby of Jupiter, Juno captured the planet with its volcanically active moon, Io, floating in space.
Jupiter and its volcanically active moon Io captured together.
Jupiter has 95 moons. In this dramatic image, the moon Io casts its shadow on the planet. If you could stand on Jupiter it would look like a full solar eclipse.
Io casts its shadow on Jupiter.
NASA/JPL-Caltech/SwRI/MSSS/Kevin M. Gill (CC-BY)
Juno was originally set for a fiery death in Jupiter's atmosphere in 2021, but NASA extended its mission through September 2025 so it could observe Ganymede, Io, and Europa more closely.
A cyclonic storm captured during Juno's 23rd flyby of Jupiter.