After a technical mishap that dashed hopes of a March launch, the US space agency has officially set its sights on April 1st, 2026, for the historic launch of the Artemis II mission.
The reason for this forced postponement lies in the vagaries of helium. During final preparations in February, engineers discovered a defective seal in one of the quick-release connections on the SLS rocket. Since the problematic node is located in the upper stage of the giant machine, access to it on the launch pad proved impossible. This necessitated the spectacular “retraction“ of the rocket and the “Orion“ spacecraft back to the giant hangar (VAB), where crews worked around the clock to fix the damage.
The good news is that the repair is now complete! Technicians have replaced the seal and confirmed the success of the operation through reduced-flow tests. While the rocket is in the “box“, NASA is also using the time to perform preventive battery replacements and thorough checks of all onboard systems to ensure that nothing will interfere with the mission.
Artemis II is a critical milestone in humanity's new lunar odyssey. Four daredevils will board “Orion“ - three Americans and one Canadian - who will become the first people in more than half a century to reach the vicinity of our natural satellite. Their 10-day flight will test the limits of deep-space survival technology and pave the way for the next big goal – landing humans on the surface of the moon.
If all goes according to plan, the massive SLS rocket will return to Launch Pad 39B later this month. And while April Fools’ Day is often associated with jokes, for NASA it is a moment of utmost seriousness. In case the weather or technology decides to act up again, backup launch windows are open between April 3 and 6.