Astronomy Research

JWST Peeks at Callisto’s Ancient Scars

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August 18, 2026 • 59 views
Original source: Universe Today

Of Jupiter’s four Galilean moons, Callisto is the one that gets the least attention. Io is constantly being resurfaced by volcanoes. Europa has a giant liquid water ocean. And Ganymede has its own magnetic field that interacts with its parent planet in weird ways. Callisto, by comparison, seems seda...

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