Europa or bust? Maybe not. Top 9 priorities for planetary research missions

5. Lunar South Pole-Aitken Basin Sample Return mission

This New Frontiers, medium-class mission would return material from a vast basin on the moon's far side – stretching from the lunar south pole to a crater called Aitken Basin – whose rocks appear to have a much different make-up than those from the areas explored by Apollo astronauts.

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