Technology & Science
Leak-Free Wet Dress Rehearsal Clears Artemis II for Early-March Launch Despite Unresolved Heat-Shield Risks
On 20 Feb 2026 NASA completed a second, leak-free wet dress rehearsal of the SLS rocket, removing the hydrogen-leak constraint and tentatively green-lighting a 6 Mar crewed lunar fly-by even though engineers decided to fly with the same Orion heat-shield design that shed material on Artemis I.
Focusing Facts
- During the 8-hour tanking on 20 Feb, 196,000 gal of liquid O₂ and 537,000 gal of liquid H₂ were loaded with no leaks exceeding safety limits, twice reaching T-00:30 in the simulated countdown.
- NASA’s May 2024 post-flight report logged 100+ Avcoat cracks on Orion’s 16.5-ft heat shield after Artemis I; nevertheless, the Artemis II capsule retains the 186-block Avcoat layout, with only the re-entry trajectory steepened to limit dwell time.
- Earliest announced launch window for Artemis II is 6 March 2026 for a 10-day, 4-person mission—humanity’s first beyond-LEO flight since Apollo 17 in 1972.
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Perspectives in this article
- Public broadcasters highlighting safety risks
- Space-industry–aligned outlets
- Mainstream wire and specialist news services tracking countdown milestones