Artemis II Is About to Splash Down. There's a Helium Leak That's 10 Times Worse Than Expected. NASA Says It's Fine.

Key Points:

• The Artemis II mission, carrying three American and one Canadian astronaut around the far side of the Moon, is set to conclude with a splashdown off San Diego after a largely successful journey despite a helium leak in the propulsion system.
• A helium leak inside the European Service Module's propulsion system was found to be ten times worse than expected, leading to the cancellation of a planned manual flight test; however, NASA confirms it poses no risk to the crew or reentry.
• The leak, while manageable for Artemis II's free-return trajectory, will require extensive valve system redesigns for Artemis IV, which demands full propulsion capability for lunar orbit insertion.
• NASA's Artemis III mission has been revised to remain in low Earth orbit for testing rendezvous and docking capabilities, postponing the next lunar surface landing attempt to Artemis IV, planned for 2027.
• The Artemis II spacecraft will re-enter Earth's atmosphere at 25,000 mph, with critical phases including module separation, communication blackout, parachute deployment, and a planned Pacific Ocean splashdown on Friday evening.