Astronomers May Have Identified The Biggest Impact Structure in Our Solar System – ScienceAlert

Jupiter’s moon Ganymede is a pretty special chunk of rock.
It’s the largest and most massive moon in the Solar System. It’s the only Solar System moon that generates its own magnetic field. It has the most liquid water of any Solar System body. And now, scientists have discovered, it may have the largest impact structure ever identified.
Astronomers have found that the tectonic troughs known as furrows, thought to be the oldest geological features on Ganymede, form a series of concentric rings…

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