Alphonsus (lunar crater)
The accompanying photo was taken from Apollo 16. Five dark patches are visible along the crater floor edge, each with a central pit. Three of the patches lie along clear fracture trends. Also, most of these pits are also elongated or irregular in shape, making it unlikely that they are impact craters. Instead, they probably mark the sites of small volcanic eruptions, possibly associated with the TLPs that have been witnessed in Alphonsus.
The unmanned American spacecraft Ranger 9 crashed into Alphonsus in 1965.
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