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Callisto is the most heavily cratered body in the solar system

An ancient landscape of ice and rock has remained unchanged for billions of years

Jupiter's moon Callisto exhibits a surface saturated with impact craters, with virtually no geological processes like plate tectonics or volcanism to erase them. Its dark, ice-rock terrain is considered one of the oldest and most heavily pitted surfaces in the entire solar system.

Callisto Thrainn PIA01219 — NASA/JPL/ASU · Public domain · source

Where this comes from

NASA Science

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Tags: callisto, craters, jupiter

Callisto is the most heavily cratered body in the solar system: the short answers

Where does this come from, and can I check it?: An ancient landscape of ice and rock has remained unchanged for billions of years. The figure is taken from NASA Science, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a space fact?: Yes. It sits on the Space shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.