SpaceX Launches First Commercial Nuclear-Powered Satellite

A New Atomic Dawn in Orbit

Commercial space just went nuclear. On July 7, a SpaceX Falcon 9 rocket blasted off from California's Vandenberg Space Force Base, hauling 81 different payloads on its Transporter-17 rideshare mission. But tucked inside was a trailblazer. Its name is BOHR, and it's the world's first commercial nuclear-powered satellite. The little softball-sized CubeSat, developed by Florida-based City Labs, signals a quiet but seismic shift in how we power our ambitions beyond Earth.

But this isn't a nuclear reactor in the way you might think. No fission. No intense heat. Instead, the BOHR mission is a testbed for City Labs' proprietary NanoTritium™ battery. It’s a betavoltaic device that generates a steady, low-level electric current directly from the radioactive decay of tritium, an isotope of hydrogen. Here's the catch: it's a technology that could unchain satellites from the sun, potentially powering missions for over 20 years with zero maintenance.

"This is a historic step for commercial nuclear power in space," said Peter Cabauy, CEO of City Labs, in a statement after the launch. "BOHR demonstrates that safe, compact, and regulatory-approved nuclear power systems are ready for routine commercial deployment. This capability enables persistent, always-on payload operations that are not constrained by sunlight or battery life."

How Betavoltaics Are Rewriting the Rules of Space Power

For decades, the satellite industry has relied on a simple formula: giant solar arrays charging chemical batteries. It's a proven system. But it has serious weaknesses. Solar power is useless in the dark—whether that's a planet's shadow, a deep lunar crater, or the dim outer reaches of the solar system. And batteries degrade, killing missions. While the BOHR satellite itself still uses solar panels for its main operations, its real job is to validate the nuclear payload inside. A crucial first step.

Betavoltaic tech works more like a solar cell than a reactor. As tritium inside the NanoTritium battery decays, it spits out beta particles (high-energy electrons). A semiconductor material simply captures these particles, converting their energy directly into a continuous electrical current. The process is non-thermal, incredibly reliable, and produces just nanowatts to microwatts of power. Not enough to run a city, obviously, but absolutely perfect for the low-power, high-reliability sensors and microelectronics that are the backbone of modern space systems. And with a half-life of 12.3 years, tritium provides a predictable power source for decades.

What could this kind of persistent, independent power unlock? Imagine sensor networks on the Moon that never sleep, even during the two-week lunar night. Think of deep-space probes operating critical systems for decades, far from the sun's fading light. For complex future systems, from lunar bases to the onboard processing needed for Artificial General Intelligence in autonomous probes, reliable long-term power isn't a luxury. It's everything.

Navigating the Final Frontier: Regulation

The technology is one thing. The paperwork is another. The regulatory path City Labs forged is almost as significant as the battery itself. The BOHR mission is the first commercial nuclear project to ever successfully get through the approval gauntlet established by the Federal Aviation Administration (FAA) under the 2019 National Security Presidential Memorandum-20. After a safety review supported by Sandia National Laboratories, the company got its payload authorization in September 2025. This sets a vital precedent.

And that’s a huge deal. NASA has used radioisotope power sources for decades on legendary missions like Voyager. But for commercial companies? Access has been basically non-existent. By proving a clear, repeatable regulatory pathway, City Labs didn't just launch a satellite; it kicked open the door to a new market. "The innovation here is not just in the technology. It's in the regulatory part," Cabauy told Payload magazine.

What's Next for the Nuclear Space Age?

The BOHR CubeSat will probably stay in orbit for about 10 years. But we won't have to wait that long for answers. City Labs expects to get definitive results from its payload demonstration within just weeks or months. Success would mean the NanoTritium battery has stood up to the brutal environment of space—the vacuum, the radiation, the wild temperature swings—all conditions where ordinary batteries simply fail.

The ripple effects go far beyond this one tiny satellite. With NASA's Artemis program aiming for a permanent base in the Moon's perpetually dark southern regions, the demand for non-solar power is exploding. City Labs' technology is now the first commercial solution to that very problem. The U.S. Air Force and NASA are already on board, giving the company grants to develop micropowered sensors to hunt for water ice in those same lunar craters. The potential here feels as foundational as the early work that's now leading to things like penny-sized quantum computers.

From medical implants to remote sensors here on Earth, betavoltaic power is no longer theoretical. It's in orbit. Right now. It's quietly generating a current that could energize the entire next generation of space exploration and commerce. The nuclear age of commercial space has arrived, not with a bang, but with the steady glow of decaying tritium.