The world of space exploration and innovation took a significant step forward in July 2026 with the launch of a unique satellite by City Labs, a Miami-based startup. This event, seemingly a small blip in the vast expanse of space, carries immense implications and opens up a new chapter in the commercialization of nuclear power in orbit.
The Significance of BOHR's Launch
At first glance, the BOHR satellite, a 1U CubeSat roughly the size of a softball, may not seem like a game-changer. However, its impact extends far beyond its modest dimensions. The real story lies in the regulatory milestone it achieved.
BOHR became the first commercially built nuclear-powered satellite to be launched, and more importantly, the first to navigate the Federal Aviation Administration's (FAA) new nuclear licensing process. This process, established under National Security Presidential Memorandum-20, provides a clear pathway for commercial entities to launch nuclear payloads.
A New Era for Nuclear Power in Space
The launch of BOHR marks a paradigm shift in the space industry. For most of the space age, nuclear power in orbit was the exclusive domain of governments, with stringent controls on plutonium supply and launch approvals. The insurance costs were prohibitive, and commercial operators steered clear of this domain.
However, City Labs' achievement demonstrates that the industry is now open to commercial players. The use of tritium, a low-consequence isotope, and the streamlined regulatory process make it feasible for small companies to explore nuclear power for space applications.
The Appeal of Tritium-Based Power
Tritium-based batteries, like the one used in BOHR, operate on a principle similar to solar cells. They emit low-energy beta particles, which are converted into electrical current by a semiconductor. This process is distinct from radioisotope thermoelectric generators (RTGs) commonly used in deep-space missions, which generate heat from decaying plutonium-238.
Tritium batteries offer several advantages. They can run for decades, tolerate extreme cold, and pose significantly less handling risk compared to plutonium-based systems. Additionally, tritium is already widely used in consumer products, from exit signs to wristwatches, indicating its relative safety.
Addressing a Critical Need
City Labs' technology is particularly well-suited for addressing a critical challenge in space exploration: powering equipment in permanently shadowed regions, such as the lunar poles. Solar panels are ineffective in these areas, and traditional batteries freeze. Tritium-based power sources, with their ability to produce electricity for extended periods without sunlight, offer a viable solution.
A Growing Market
The market for such technology is rapidly expanding. Lunar landers, cislunar surveillance satellites, deep-space smallsats, and national security payloads all require reliable power sources, especially in eclipse conditions. City Labs' achievement opens up new opportunities for these applications, and the company is already working on scaling its technology to meet these demands.
The Future of Commercial Nuclear Satellites
The successful launch of BOHR has paved the way for other companies to pursue similar power technologies. The regulatory approval process, now a documented pathway, will make it easier for commercial entities to enter this domain.
While BOHR's power output is currently limited to nanowatts to microwatts, City Labs is working on scaling its technology to meet the power needs of small lunar surface instruments and beyond. The company's vision aligns with NASA's plans to deploy a 100-kilowatt fission reactor on the lunar surface by 2030, and their technology could play a crucial role in supporting the sensor network and distributed instruments around this reactor.
A New Normal in Space
The launch of Transporter-17, carrying 81 satellites in total, including BOHR, is a testament to the changing dynamics of the space industry. What was once unthinkable - a rideshare manifest with a nuclear device and 80 commercial payloads - has now become a routine occurrence. SpaceX's Transporter series has put over 1,800 payloads into orbit since 2021, and the industry is rapidly adapting to this new normal.
Conclusion
The launch of City Labs' BOHR satellite is a significant milestone in the commercialization of space. It demonstrates the feasibility of small companies entering the nuclear power domain and opens up new possibilities for space exploration and innovation. As the industry continues to evolve, we can expect to see more commercial entities leveraging nuclear power for a range of applications, from lunar missions to deep-space exploration.
