NASA shakes up its Artemis program to speed up lunar return

NASA Shakes Up Artemis Program to Speed Up Lunar Return

In a move that has sent shockwaves through the space community, NASA Administrator Jared Isaacman announced sweeping changes to the Artemis program on Friday morning. The changes, which include an increased cadence of missions and the cancellation of an expensive rocket stage, are aimed at revitalizing an agency that has struggled to move at a glacial pace on its deep space programs.

The Problem with the Current Approach

The Artemis program, which aims to return humans to the lunar surface by 2025, has been plagued by delays and cost overruns. The program's current approach, which involves launching a massive Space Launch System (SLS) rocket with a new upper stage, has been criticized for being too complex and expensive. The SLS rocket, which is the most powerful rocket in the world, has experienced hydrogen and helium leaks during both the Artemis I and Artemis II pre-launch preparations, leading to monthslong delays in launch.

Standardizing the SLS Rocket

To address these issues, NASA plans to standardize the SLS rocket into a single configuration to make it as reliable as possible and to launch it as frequently as every 10 months. The agency will fly the SLS vehicle until there are commercial alternatives to launch crew to the Moon, perhaps through Artemis V as Congress has mandated, or perhaps even a little longer.

Canceling the Exploration Upper Stage

One of the most significant changes announced by NASA is the cancellation of the Exploration Upper Stage (EUS) and Block IB upgrade for the SLS rocket. The EUS was a more powerful upper stage that was due to launch for the first time later this decade, but its development has been plagued by delays and cost overruns. By canceling the EUS, NASA will be able to focus on accelerating a lunar landing and will also save an estimated $2 billion annually.

New Upper Stage for Artemis IV

For the Artemis IV lunar landing mission, NASA will need to human-rate a new upper stage for the SLS rocket. The vehicle currently uses a modified Delta IV upper stage manufactured by United Launch Alliance, but that rocket production line is closed. NASA will now procure a new stage commercially, with the most likely replacement being the Centaur V upper stage currently flying on Vulcan rockets.

Buying Down Risk with Earth-Orbit Rendezvous

To buy down risk for a lunar landing, NASA plans to conduct an Earth-orbit rendezvous between Orion and Starship. This will allow the agency to test the Orion spacecraft and the Starship lander in a low-risk environment before attempting a lunar landing. The Earth-orbit rendezvous will also provide an opportunity for NASA to test the communication and navigation systems required for a lunar landing.

Implications for the Lunar Gateway

The cancellation of the EUS and the new approach to the Artemis program have significant implications for the Lunar Gateway, a proposed space station in a high orbit around the Moon. The main purpose of the Block 1B version of SLS was to launch heavier payloads, most notably elements of the Gateway along with Orion. NASA officials were mum on the Lunar Gateway during the announcement, but it is clear that the agency will need to reassess its plans for the Gateway in light of the new approach to the Artemis program.

Forward-Looking Thoughts

The changes announced by NASA on Friday are a significant step forward for the Artemis program and for the agency as a whole. By standardizing the SLS rocket and canceling the EUS, NASA is able to focus on accelerating a lunar landing and save an estimated $2 billion annually. The new approach to the Artemis program also provides an opportunity for NASA to buy down risk for a lunar landing and to test the communication and navigation systems required for a lunar landing. As the agency moves forward with the Artemis program, it will be exciting to see how these changes play out and what the future holds for space exploration.