Four astronauts will be part of the next mission in the agency’s program to return humans to the surface of the moon by 2028.

NASA on Tuesday introduced the four astronauts it will send to space on the Artemis III mission, which will demonstrate the flight and docking capabilities of an as yet untested lunar lander.

Mr. Douglas is Black, Mr. Rubio was the first astronaut of Salvadoran descent to go to space and Mr. Parmitano is the European Space Agency’s first representative on board an Artemis program mission.