NASA is making major changes to its Artemis Moon program. On Friday, Administrator Jared Isaacman announced the space agency would carry out an additional flight in 2027 to test commercial lunar landers from SpaceX and/or Blue Origin. The new mission will take the place of Artemis 3, which previously would have seen NASA attempt to land on the Moon for the first time since 1972. The flight will also see the agency test a new spacesuit made by Axiom Space.

As part of the new plan, the redesigned Artemis 3 mission will give NASA the chance to test at least one lander in the relative safety of low Earth orbit. NASA will attempt to return humans to the Moon during Artemis 4 sometime in 2028, with the potential for another mission as early as later that same year. Per CBS News, the decision comes after NASA’s Aerospace Safety Advisory Plan said the agency’s existing mission plan was too risky.

“NASA must standardize its approach, increase flight rate safely, and execute on the President’s national space policy. With credible competition from our greatest geopolitical adversary increasing by the day, we need to move faster, eliminate delays, and achieve our objectives,” said Isaacman. “Standardizing vehicle configuration, increasing flight rate and progressing through objectives in a logical, phased approach, is how we achieved the near-impossible in 1969 and it is how we will do it again.”

The change of plan also comes as Artemis 2 has faced multiple delays in recent months. The Space Launch System (SLS) heavy-lift rocket has, once again, proven to be temperamental. NASA had planned to launch Artemis 2 in early February, but pushed the flight back after it caught a hydrogen leak during a fueling test. More recently, NASA delayed the mission to give its engineers time to fix a helium pressurization issue in the upper stage of the SLS.  At the earliest, the mission can now get underway on April 1.