More than half a century after Apollo, NASA's Artemis programme is the plan to send astronauts back to the Moon, this time to stay. The ambition is clear; the schedule has proven far less stable. For anyone trying to follow Artemis without getting lost in announcements, a plain status check helps: what each mission is supposed to do, what hardware exists, and what still stands in the way.

The architecture has four main pieces. The Space Launch System, or SLS, is the heavy rocket that launches the Orion crew capsule toward the Moon. Orion carries the crew around the Moon and back. The Lunar Gateway, a small station in lunar orbit, is planned as a staging point for later missions. And a commercial Human Landing System, built by SpaceX as a variant of Starship, is supposed to ferry astronauts from lunar orbit down to the surface and back.

Artemis I already flew: an uncrewed Orion looped around the Moon and back in late 2022, testing the heat shield and systems. Artemis II is the first crewed mission, sending four astronauts around the Moon and back without landing, a roughly ten-day voyage that tests life support, navigation and communications with a crew aboard. Its schedule has slipped several times as engineers worked through heat shield issues found on Artemis I and other readiness items, and its launch date remains the programme's most-watched milestone.

Artemis III is the landing mission, and it is where the schedule gets hardest. It requires not only SLS and Orion but also a Starship landing system that must first demonstrate orbital refuelling, a technology never done at this scale, plus a lunar surface suit programme and a successful uncrewed Starship landing demonstration. Each of those is a major engineering project in its own right, which is why independent assessments have long expected Artemis III to fly later than its official target date.

The Gateway station, meanwhile, has been reshaped repeatedly. Originally central to the plan, its role has shrunk for early missions, with some elements deferred or redesigned. Supporters argue it remains valuable for sustained lunar operations and Mars preparation; critics argue it adds cost and complexity to missions that could go directly to the surface. The debate is a useful reminder that Artemis is as much a political and budgetary programme as a technical one.

Budget and politics shape the timeline as surely as engineering. SLS and Orion are expensive, expendable systems, and each Artemis launch costs billions, which invites scrutiny in every budget cycle. Commercial alternatives, notably SpaceX's Starship, promise far lower costs but are still proving their own capabilities. The tension between proven-but-expensive and cheap-but-unproven hardware runs through every Artemis decision.

For Moon enthusiasts, the practical advice is to follow hardware, not headlines. Watch for Artemis II's launch, for Starship orbital refuelling tests, and for the uncrewed Starship lunar landing demonstration. Those three events, in that order, are the real gates to a crewed landing, and until they happen, any landing date is best treated as an aspiration rather than a schedule.

Whatever the dates, Artemis matters beyond flags and footprints. A sustained lunar presence would test life support, radiation protection, in-situ resource use and long-duration operations that a Mars mission will need. The Moon is the rehearsal stage for Mars, and the rehearsal is under way, even if it is running behind schedule.

For students and young engineers, Artemis is also a careers story: the programme employs thousands of people across dozens of states and several countries, and its delays and recoveries are a realistic education in how large engineering programmes actually run.