GMoromisato
today at 6:52 PM
This is a good change. To summarize for those not following closely:
SLS, a rocket derived from Shuttle tech, takes astronauts on the Orion spacecraft to the vicinity of the moon. From there, a lander built by either SpaceX or Blue Origin will take the astronauts to the surface and then back to Orion. The astronauts will then return to Earth in Orion.
Artemis I flew a couple of years ago and took an uncrewed Orion spacecraft around the moon and back to Earth.
Artemis II, which should hopefully fly in April, will take 4 astronauts around the moon--the first time humans have been that far in space in 50+ years.
Artemis III was going to be a crewed moon landing, planned around 2028, but between delays in the lander development and the complexity of this mission, no one expected it to happen on time.
The major change that NASA has announced is to launch SLS more often--ideally once every 10 months. There are two major advantages to this:
1. More frequent launches will improve reliability because the team/engineers will understand the system better. There will be more commonality between launches.
2. With more launches before the end of the decade deadline there are more opportunities for intermediate milestones. In particular, Artemis III will turn into an Earth-orbit mission in which Orion will dock with one or both of the landers. This will test out the system before heading to the moon. Moreover, NASA plans to have at least two lunar landing attempts in 2028, which means that even if the first attempt is scrubbed, they will still have a chance to land before the end of the decade.