The cave leads from a pit in the Sea of Tranquility, where Neil Armstrong and Buzz Aldrin first walked on the moon in 1969. “Lunar cave systems have been proposed as great places to site future ...

Conduits created by intense, heat-generating impacts might exist in other regions of the moon, near the poles. But this large lava tube in the Sea of Tranquility might be necessary for a future ...

The next phase of the Commercial Lunar Payload Services moon exploration program began ... northeast of the Sea of Tranquility, in what was described as a clockwork landing with no anomalies ...