Buzz Aldrin, the second man to walk on the surface of the Moon, advocates returning to our pockmarked satellite, first with remotely controlled robotic probes and later with human beings, as he states in June’s “Buzz Aldrin on our future in space.” The journey back to the Moon and the technological and psychological problems we solve in the process will prepare us, Aldrin says, for eventual colonies on celestial bodies other than Earth. Although humans have not gone beyond low Earth orbit since the 1970s, the Moon’s pull is alive and well today.
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