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The $93-billion plan to put astronauts back on the Moon

The Artemis I Space Launch System (SLS) and Orion spacecraft at Launch Pad 39B at NASA’s Kennedy Space Center.

Tests of NASA’s new Space Launch System rocket, seen here on its launch pad, revealed problems that have set back its first mission. Credit: NASA/Ben Smegelsky

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Nature 605, 212-216 (2022)



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