Enlarge / The Orion spacecraft for the Artemis II mission, comprising its crew and service modules, was lifted into a vacuum test chamber at NASA’s Kennedy Space Center in Florida on April 4, 2024.NASA/Amanda Stevenson
NASA would like to start stacking the Space Launch System rocket for the Artemis II mission—the first human flight around the Moon since 1972—sometime next month, but the agency’s exploration chief says the milestone could be delayed as engineers continue studying the readiness of the Orion spacecraft’s heat shield.
The heat shield, already installed at the base of the Orion spacecraft, will take the brunt of
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