Four NASA senior officials working on the agency’s moon program, Artemis, will retire this week.

These officials were part of the team that succeeded in launching Artemis I as “the first flight test of the integrated Orion spacecraft and the Space Launch System (SLS) rocket,” according to NASA’s website. The unmanned rocket flew 40,000 miles beyond the moon and back, for a total of 1.4 million miles, “demonstrating our capability to send humans to lunar orbit on the second flight test.”