Sometime in our Solar System’s past, a 500-mile-wide ball of rock called 2002 MS4 was peacefully drifting through the Kuiper Belt, minding its own business, when something smashed into its northern ...
An object in the outer solar system appears to have had a huge chunk taken out of it in a violent collision, despite such impacts being rare at this distance from the sun. Flavia Rommel at the Federal ...
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