Italy has decided that if humans are going to stay on the Moon for good, solar panels alone will not cut it. Through a new national programme, Rome is pushing nuclear power for the lunar surface, hoping to become an indispensable partner for NASA and Europe in the next wave of human spaceflight.
Italy’s nuclear bet on the Moon
At the start of December, the Italian Space Agency (ASI) officially launched Selene, short for “Sistema Energetico Lunare con l’Energia Nucleare”. The plan: design and test small fission reactors able to power permanent lunar bases.
Selene aims to create a “Moon Energy Hub” delivering constant, controllable power to surface habitats, vehicles and scientific stations.
The concept is simple to describe, tough to execute. Instead of depending mainly on solar farms, Selene would rely on so-called surface nuclear reactors (SNRs). These compact units would sit on the lunar ground, convert nuclear fission heat into electricity, and feed a local grid spanning several installations.
For Italy, this is not just a technology project. It is a strategic card in the global return to the Moon. Russia, China and India have already signalled plans for a joint nuclear power plant under the ILRS (International Lunar Research Station) project. By bringing its own design to the table, Italy wants a seat at every major discussion about how future lunar settlements are powered and operated.
Why solar power alone won’t sustain lunar colonies
On Earth, solar power works because nights are short and grids are interconnected. On the Moon, the situation is far harsher. Most locations face roughly 14 days of daylight followed by 14 days of darkness.
That long “lunar night” is a killer problem for purely solar-powered bases. Batteries would need gigantic capacity and mass. Energy-hungry operations like life support, communications and industrial processing cannot simply pause for two weeks every month.
Nuclear reactors offer what solar arrays on the Moon cannot: steady power, day and night, at almost any latitude.
NASA has reached the same conclusion for its Artemis programme and is funding its own fission surface power concepts. Selene is Italy’s national answer, designed to slot into that architecture and support European and American crews on the ground.
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Inside project Selene and the “Moon Energy Hub”
Selene is structured as a three-year technology drive. The flagship outcome is the Moon Energy Hub (MEnH), a central node that hosts the surface nuclear reactors and manages energy flows across a base.
Beyond the reactors themselves, the project tackles several difficult subsystems:
- advanced sensors to monitor radiation, temperature and mechanical stress
- highly autonomous control software, as crews and ground teams cannot babysit the system 24/7
- wireless power transmission to distant users, reducing the need for heavy power cables
- thermal management systems able to reject excess heat in a near-vacuum
- energy storage to smooth sudden changes in demand or brief outages
One of the most delicate parts is heat removal. Reactors generate far more heat than electricity, and in space there is no air or water to carry it away. Selene includes an experimental trial dedicated just to this cooling challenge, which will be key for real-world operation.
Designing for failure, not just for normal days
Engineers are intentionally designing the system around stressful scenarios. Power grids on Earth regularly face sudden spikes or drops in demand. A lunar grid will do the same, but with higher stakes: an unexpected failure could threaten air, water and communications.
The MEnH concept includes storage and flexible routing so that a local fault does not black out an entire base.
Under the current vision, the hub distributes high-power feeds to heavy users such as habitats, labs and resource extraction plants. At the same time, lighter activities could use mobile receivers that tap into wireless transmissions. Think of small rovers, temporary science stations or construction robots operating tens of kilometres away from the main base.
Italy’s wider lunar ambitions
Selene does not come from nowhere. Italy has spent years positioning itself as a central supplier of hardware for Artemis and for the future lunar economy.
One clear example is the Multi-Purpose Habitation (MPH) module. Under a 2022 agreement, NASA authorised ASI to lead development of this pressurised lunar habitat. It is planned as a flexible “home on the Moon”, able to host crews for short and medium stays and to interface with rovers, power systems and other modules.
The MPH is designed not just as living quarters but also as a backup refuge. Any astronaut in trouble, whatever their nationality, should be able to use it in an emergency. Pairing that kind of safe haven with a robust nuclear-powered grid makes Italy’s proposals more attractive to international partners.
Key Italian roles in orbital infrastructure
Italy is also heavily involved in the NASA-led Gateway, the small space station set to orbit the Moon. Italian industry, especially Thales Alenia Space, is building or co-building several modules:
| Module / element | Role |
|---|---|
| ESPRIT | Communications, refuelling and additional storage for Gateway |
| I-HAB | International habitation module for crew living and work space |
| HALO structure | Pressure shell and structural elements for the main US habitation module |
This combination of surface habitats, orbital modules and now a dedicated energy system gives Italy strong bargaining power with both the European Space Agency and NASA. The country can credibly argue for more astronaut seats, more scientific leadership and a long-term presence in lunar decision-making.
Nuclear on the Moon: risks, safeguards and public perception
Nuclear power in space is hardly new. The US and Russia have flown dozens of nuclear-powered satellites and used radioisotope heaters on missions to Mars and beyond. What changes with Selene and similar concepts is the scale and location: larger reactors, operating close to human habitats.
Risk management will rely on several layers. Reactors would likely be shipped “cold”, with fuel loaded or activated only after landing and inspection. Sites would be selected far enough from habitats to limit radiation, while still allowing efficient power transmission. Shielding could combine regolith – the Moon’s dusty soil – with engineered barriers around key components.
One often overlooked advantage of lunar nuclear power is political: it reduces dependence on Earth shipments of fuel and batteries once a base is built.
Public perception remains a real factor. Even if the physics are sound and the designs conservative, the word “nuclear” still triggers scepticism. Italian officials and engineers will need clear, sober communication to explain why the technology is being used and what safeguards are in place.
What a nuclear-powered lunar base might look like
Imagine a decade from now: an Artemis crew steps out of a lander near the Moon’s south pole. A cluster of cylindrical modules forms the core habitat. Slightly beyond, robotic haulers move regolith into mounds, both for building materials and for radiation shielding.
A few kilometres away, on a flat patch of terrain, sits the Moon Energy Hub. Its reactors hum quietly inside armoured housings. Tall radiators, shaped like panels or trusses, glow faintly in the infrared as they shed heat into space. Cables run from the hub to the main base, while some rovers recharge via wireless receiving pads.
During the lunar day, solar arrays still contribute, easing the load on the reactors and building reserves in batteries or thermal storage units. During the two-week night, the base barely notices the sunset. Lights stay on, chemistry labs keep running, oxygen extraction plants continue processing regolith, and the habitat maintains Earth-like conditions.
Key terms and ideas behind Selene
Several technical terms sit at the heart of this Italian initiative:
- Fission reactor: a device that splits heavy atomic nuclei, releasing heat, which is then converted into electricity.
- Surface nuclear reactor (SNR): a compact fission system designed to operate on a planetary surface rather than in orbit.
- Wireless power transmission: the transfer of energy without physical cables, for example via microwaves or lasers.
- Technology maturity: a measure of how close a technology is to real operational use rather than lab demonstration.
As these technologies converge, they could benefit more than just lunar plans. Techniques for automated reactor control, high-reliability sensors and thermal management might feed back into remote power stations on Earth, such as in polar regions or disaster areas where grids are fragile.
Italy’s Selene project sits at that junction of space ambition and terrestrial utility. If it succeeds in demonstrating a practical, safe Moon Energy Hub, the concept of a nuclear-powered settlement will shift from science fiction scenario to a serious option on the planning desks of space agencies worldwide.
Originally posted 2026-02-08 20:14:35.