原文：https://www.nasa.gov/specials/moon2mars/#top

关于美国再次登月的时间，NASA在官网上已经发布了任务时间表：

2020-Artemis 1

NASA is targeting 2020 for the launch of its powerful Space Launch System rocket and Orion spacecraft together for the first time from a modernized Kennedy Space Center in Florida. This uncrewed flight test, known as Artemis 1, will demonstrate our capability to send crew spaceship to lunar orbit ahead of a return to the surface of the Moon. After launch, SLS will also deploy a number of CubeSats to perform experiments and technology demonstrations.

2022-Artemis 2

NASA is targeting 2022 to test its powerful Space Launch System with astronauts aboard the Orion spacecraft. Launching again from Kennedy Space Center in Florida, Artemis 2 will fly a different path than the first test flight, and will take a crew around the Moon for the first time in fifty years. This first mission with astronauts will mark a significant step forward for regular missions with crew to lunar orbit, and ultimately on the surface of the Moon and beyond.

2024-Artemis 3

NASA’s Space Launch System will send Orion and its crew to lunar orbit, where it will dock at the Gateway. The crew will check out the Gateway cabin and Human Landing System before boarding the lander to ride down to the Moon.