A half-century ago, NASA conducted the Apollo missions, which put the first men on the Moon. Artemis (the name of Apollo's twin sister) is NASA's planned lunar mission to put the first woman and the next man on the Moon. Through a variety of upcoming robotic and human activities on the surface and in orbit around the Moon, we will better understand the universe and our home planet. Then, we will use what we learn on and around the Moon to take the next giant leap – sending astronauts to Mars.