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NASA delays Artemis 2 moon mission to March due to liquid hydrogen leak

By Thomson Reuters Feb 3, 2026 | 5:09 AM

Feb 3 (Reuters) – NASA said on Tuesday it was targeting a March window to launch its Artemis 2 mission to send ‍four astronauts around the moon after a delay in this week’s departure, caused by a leak of liquid hydrogen during a key “wet dress rehearsal”.

The mission is the second in the multibillion-dollar Artemis moon program, following ‌an uncrewed flight in 2022, and ‌the first to carry astronauts around the moon in a 10-day journey to the farthest humans have ever ventured in space.

The leak took place in  an  interface “used ​to route the cryogenic propellant into the rocket’s core stage,” NASA said, adding that it would release ‍the astronauts, quarantined since January ​21 for the anticipated launch.

“These tests ​are designed to surface issues before flight and ‍set up launch day with the highest probability of success,” NASA Administrator Jared Isaacman said in a post on X.

“We expect to conduct an additional ‘wet dress rehearsal’ and then target the March ‍window.”

The mission, crewed by three U.S. astronauts and a Canadian, is a precursor test to the agency’s first ‍astronaut moon ‍landing since 1972.

“With more than three ​years between Space Launch System (SLS) rocket ​launches, ⁠we fully anticipated encountering challenges,” Isaacman ‌said. “That is precisely why we conduct a ‘wet dress rehearsal’.”

The test also saw intermittent ground audio dropouts and extended closeout operations for the mission’s Orion crew capsule, he added.

(Reporting by Shubham Kalia in Bengaluru; Editing by ⁠Clarence Fernandez)