South Pole-Aitken Basin

Color enhanced image showing massive impact region on the Moon.
NASA/GSFC/University of Arizona
September 28, 2017
CreditNASA/GSFC/University of Arizona
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The South Pole-Aitken Basin on the lunar far side is one of the largest and oldest impact features in the solar system. It's easily seen in the elevation data. The low center is dark blue and purple. Mountains on its edge, remnants of outer rings, are red and yellow.