Artemis II Marks Return to Deep Space Exploration

For the first time in more than five decades, astronauts traveled beyond low Earth orbit, marking a significant milestone in the United States’ return to deep space exploration. NASA’s Artemis II mission, which launched April 1st of this year, carried a crew on a near 10-day journey around the Moon, following a free-return trajectory that sent the spacecraft behind the lunar far side before returning safely to Earth. 

During the mission, astronauts traveled more than 600,000 miles and reached distances exceeding 250,000 miles from Earth, farther than any human spaceflight since the Apollo era. As the spacecraft passed behind the Moon, the crew experienced a temporary communications blackout, highlighting both the technical challenges and operational realities of deep space travel. The mission also provided direct observation of the Moon’s far side, often referred to as the “dark side”, a perspective that remains unseen from Earth. 

Beyond its historic significance, Artemis II served as a critical systems test for NASA’s Orion spacecraft, including life support, navigation, and communication capabilities. These demonstrations are intended to validate the technologies required for future missions, including planned lunar landings and longer-duration operations on and around the Moon. 

More broadly, Artemis II represents a transition from exploration to sustained presence. As NASA and its partners look toward establishing long-term operations in cislunar space and on the lunar surface, missions like Artemis II are laying the technical and operational foundation for what comes next. 

Policy Direction: Ensuring American Space Superiority 

The Artemis II mission aligns with broader federal priorities outlined in the Ensuring American Space Superiority executive order issued by President Trump in December 2025. The order establishes a framework for expanding U.S. leadership in space, with a focus on national security, economic competitiveness, and long-term infrastructure development beyond Earth orbit. 

The executive order calls for an accelerated return to the Moon, including crewed missions by the end of the decade and the development of a sustained lunar presence. It also emphasizes strengthening domestic space capabilities, expanding public-private partnerships, and supporting the technologies necessary to operate in increasingly complex space environments. 

A key component of the policy is the recognition that future space missions will require reliable, continuous power systems capable of operating through extended lunar nights and extreme environmental conditions. To address this challenge, the order highlights the importance of advancing nuclear energy technologies for use in space, including the potential deployment of nuclear reactors on the Moon to support long-duration missions and infrastructure. 

As federal policy increasingly prioritizes sustained lunar operations and resilient power systems, attention is turning toward the technical frameworks needed to safely design, deploy, and operate these technologies. In response, ASME is taking steps to support this emerging need through the development of standards aimed at enabling these next generation capabilities. 

ASME / ANS Joint Committee on Nuclear Risk Management (JCNRM) 

Building on the growing need for reliable and risk-informed nuclear technologies, ASME, in partnership with the American Nuclear Society (ANS), convenes the JCNRM. This joint body serves as a voluntary consensus standards committee responsible for developing and maintaining guidance related to nuclear safety, risk assessment, and performance-based engineering approaches across a range of nuclear applications. By bringing together experts from industry, government, and academia, JCNRM supports the development of technically rigorous and applicable standards. 

The committee’s work has historically centered on probabilistic risk assessment (PRA) and related methodologies that inform the design, operation, and regulatory evaluation of nuclear systems. As interest grows in extending nuclear technologies beyond traditional terrestrial applications, including into space environments, the role of established bodies such as JCNRM comes increasingly relevant. 

In response to this emerging need, the ASME/ANS JCNRM recently established a Working Group on Space Reactors to begin development of a new standard focused on safety and risk analysis methods for nuclear reactors deployed in space applications. The standard is expected to establish requirements for assessing risks to the public associated with both the launch and operation of space-based nuclear systems, incorporating established PRA methodologies, while also addressing unique risks associated with the mission life cycle.  

Together, the Artemis II mission and the Administration’s space policy priorities reflect a broader shift in how the United States approaches space exploration. As efforts move from demonstration to deployment, the role of technical standards and engineering frameworks will become increasingly important in translating policy objectives into operational reality.