Why Does the Moon’s Ryder Crater Look This Way?

Ryder Crater on the Moon. Credit: NASA/GSFC/Arizona State University.

This may be one of the strangest craters you’ll ever see.

Ryder crater is located near the south pole of our Moon, and it has a bizarre oblong shape (approximately 13 x 17 km in size),  with a ridge cutting across the middle.

The majority of impact craters are round. How did Ryder crater end up in this odd shape?

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