Jupiter's huge moon Ganymede may have the largest impact scar in the solar system

Scientists have discovered what they believe may be the largest impact crater in the entire solar system, with scars covering a vast portion of Jupiter's biggest moon, Ganymede. The scientists behind the new research wanted to revisit observations from a host of past NASA missions that studied the massive moon, which is larger than Mercury, the smallest planet in our neighborhood. In particular, they were intrigued by a set of features dubbed furrows, which appear on some of the moon's oldest terrain.
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