Moon's oldest crater discovery
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circular craterPhys Org
•The moon's biggest and most ancient crater is more circular than previously thought
91% Informative
South Pole-Aitken basin is the moon's oldest and largest visible crater, 4 billion years old .
Scientists thought that the crater was shaped like an oval or ellipse.
But a new study suggests that the impact may have been much more direct, leading to a much rounder crater.
This finding challenges our current understanding of moon 's history with significant implications for NASA 's future missions to the moon.
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