Remember Apollo 9? No? Have a Look at Artemis III.

Almost forgotten now, the mission circled the Earth for 10 days, performing a series of tests with the lunar lander. What it lacked in glory it made up for in technological contributions.​Almost forgotten now, the mission circled the Earth for 10 days, performing a series of tests with the lunar lander. What it lacked in glory it made up for in technological contributions.