Callisto - Canada News Beep

Juno capturing the marks on Jupiter of all four Galilean moons; the aurorae related to each are labeled Io, Eur (for Europa), Gan (for Ganymede), and Cal (for Callisto). Image credit: NASA / JPL-Caltech / SwRI / UVS Team / MSSS / Gill / Jónsson / Perry / Hue / Rabia.

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Juno Observes Ultraviolet Satellite Footprint of Jupiter’s Moon Callisto

September 4, 2025

Jupiter hosts the brightest and most spectacular aurorae in the Solar System. Near its poles, these shimmering lights…

An illustration shows Jupiter at the center of the image with its four Galilean moons extending toward the left — Io, Europa, Ganymede, and Callisto, their orbits traced by ever-increasing ellipses. On the other side of the image, another arc, in blue and entering from the right side of the image, shows the Juno spacecraft's orbit around Jupiter. Below that, in the lower right corner, an inset image diagrams auroras above Jupiter linked to each of the four moons, tracing bright arcs in green and orange.

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Juno Detected the Final Missing Auroral Signature from Jupiter’s Four Largest Moons

September 3, 2025

Jupiter hosts the brightest and most spectacular auroras in the Solar System. Near its poles, these shimmering lights…