NASA is definitely thinking big on the moon. The U.S. space agency plans to build a crewed lunar base over the next decade or so via its Artemis program — and we just got a sense of that project's impressive scope. "We envision the moon base to be hundreds of square miles, with different assets all building up to the objective of permanent lunar presence on the moon ," Carlos García-Galán, the manager of NASA's Moon Base program at the agency's headquarters in Washington, D.C., said during a press conference Tuesday (May 26). This NASA chart outlines the three major steps of NASA's Moon Base program from 2026 through 2032, starting with unpressurized rovers and sorties, and ending with a permanent lunar base. (Image credit: NASA) The base will be constructed over the next decade or so near the lunar south pole, which is thought to harbor large amounts of water ice . This precious resource has been accumulating for billions of years on the permanently shadowed floors of craters in the region, scientists say.…