The U.S. government plans to launch a nuclear reactor into Earth orbit by 2028 and place another on the Moon by 2030. [1]
The move is framed as a way to give American space missions a reliable power source, reduce reliance on solar energy, and enhance national‑security capabilities as rivals advance their own space programs. [4]
A memorandum issued by the Trump administration said NASA and the Department of Defense should develop the orbital reactor, while Power Magazine said the Department of War (now the Department of Defense) will co‑lead the lunar effort. [3] MSN’s coverage said the administration itself issued the order without specifying a lead agency, highlighting a discrepancy in reporting. [1]
The first reactor, scheduled for launch as early as 2028, would use a compact fission design to generate kilowatts of continuous electricity for satellites and possibly for a future lunar gateway. [1] A second orbital unit is mentioned in another MSN article, which suggests a follow‑on reactor could be operational by the end of the decade, though exact timing remains unclear. [1]
On the Moon, the planned 2030 reactor would sit on the surface, providing steady power for habitats, scientific instruments, and resource‑extraction activities. Proponents said nuclear power can operate through the long lunar night, which lasts about 14 Earth days, eliminating the need for massive battery banks. [2]
The initiative also ties into broader defense objectives. By placing a nuclear source in orbit, the United States could power high‑energy sensors or communication relays that are less vulnerable to anti‑satellite attacks. The Department of Defense has said the technology could support future war‑fighting platforms in space. [4]
Critics raise concerns about safety, debris, and the potential for nuclear material to fall to Earth in the event of a launch failure. Existing international treaties on nuclear weapons in space do not explicitly address peaceful nuclear power, prompting calls for new regulatory frameworks. [3]
"The United States aims to have an operational nuclear reactor in Earth orbit by 2028." [1]
"A lunar surface reactor is slated for deployment by 2030 to power future missions." [2]
"The program is framed as a boost to exploration, national security, and reliable power." [4]
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**What this means** The rollout of space‑based nuclear reactors could give the United States a strategic edge by ensuring continuous power for deep‑space and lunar operations, while also setting a precedent for how nations integrate nuclear technology into the emerging domain of space security. The approach will likely spur international dialogue on safety standards and may accelerate the pace of lunar habitation and commercial activities.
“"The United States aims to have an operational nuclear reactor in Earth orbit by 2028."”
The rollout of space‑based nuclear reactors could give the United States a strategic edge by ensuring continuous power for deep‑space and lunar operations, while also setting a precedent for how nations integrate nuclear technology into the emerging domain of space security. The approach will likely spur international dialogue on safety standards and may accelerate the pace of lunar habitation and commercial activities.
