NASA Conducts Second Rocket Fueling Test for Artemis Moon Mission

The results will determine when Artemis astronauts can head to the lunar surface.

Published on Feb. 25, 2026

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NASA conducted a second fueling test of its massive Space Launch System rocket on Thursday after leaks halted the initial dress rehearsal and delayed the first lunar trip by astronauts in more than 50 years. The space agency pumped over 700,000 gallons of propellant into the rocket as part of the critical pre-launch exercise.

Why it matters

The successful completion of this fueling test is a key milestone that will allow NASA to set a target launch date for the Artemis I uncrewed lunar mission, which will pave the way for future crewed Artemis flights to the moon.

The details

During the test, launch teams pumped cryogenic liquid hydrogen and liquid oxygen into the Space Launch System rocket's core stage and Interim Cryogenic Propulsion Stage. This allowed them to verify the rocket's fueling procedures and identify any potential leaks or other issues before the actual launch.

  • The initial dress rehearsal was halted earlier this month due to a liquid hydrogen leak.
  • The second fueling test took place on Thursday, February 19, 2026.

The players

NASA

The United States National Aeronautics and Space Administration, the federal agency responsible for the civilian space program, the Artemis lunar exploration program, and other space exploration efforts.

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What’s next

NASA will analyze the data from the second fueling test to determine if any further rehearsals are needed before setting a target launch date for the uncrewed Artemis I mission around the Moon.

The takeaway

This second fueling test is a critical step forward for NASA's Artemis program, which aims to return humans to the lunar surface for the first time since the Apollo era. The successful completion of this test brings the agency one step closer to making that goal a reality.