NASA Delays Artemis II Lunar Flyby Mission

Rocket issue forces move off launchpad, pushing launch to April

Feb. 25, 2026 at 11:03pm

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NASA's historic Artemis II lunar flyby mission has hit a snag, forcing the agency to roll its massive Space Launch System rocket back to the hangar at Kennedy Space Center in Cape Canaveral, Florida, to repair an issue that would affect the proper flow of fuel into the rocket's engines. The launch, previously targeted for March, is now pushed to no earlier than April.

Why it matters

The Artemis II mission will be the first crewed U.S. lunar spaceflight in over 50 years, paving the way for future Artemis missions to establish a continuous human presence on the moon and eventually support missions to Mars. The delay highlights the technical challenges of deep space exploration and the importance of thorough testing to ensure mission success.

The details

During a successful wet dress rehearsal less than 24 hours earlier, engineers discovered an issue with the 322-foot-tall, 11-million-pound SLS rocket that would affect the proper flow of fuel into the engines. This required the rocket to be rolled back to the hangar for repairs, pushing the launch timeline to no earlier than April.

  • The Artemis I uncrewed flight test was successfully completed in November 2022.
  • The Artemis II mission was previously targeted to launch in March 2026.
  • NASA has identified April 1, 3, 4, 5, 6 and 30 as potential new launch days for Artemis II.

The players

NASA

The U.S. National Aeronautics and Space Administration, the government agency responsible for the Artemis program and deep space exploration.

Space Launch System (SLS) Rocket

The massive 322-foot-tall, 11-million-pound rocket that will propel the Artemis II astronauts into deep space.

Artemis II Crew

The four astronauts selected for the Artemis II mission: NASA's Reid Wiseman, Victor Glover and Christina Koch, and Canadian Space Agency astronaut Jeremy Hansen.

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What they’re saying

“Artemis II builds on the success of the uncrewed Artemis I in 2022, and will demonstrate a broad range of capabilities needed on deep space missions.”

— NASA

What’s next

NASA will work to repair the issue with the SLS rocket's fueling system, with the goal of launching Artemis II in the April launch window.

The takeaway

The delay in the Artemis II mission highlights the technical complexities and rigorous testing required for deep space exploration, as NASA works to safely return humans to the moon and lay the groundwork for future missions to Mars.