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Freedom251 › Blog › Artemis Accords

Who Owns the Moon? The Space-Law Skills That Explain the Rules

By Freedom251 Team · · 4 min read

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No country can claim the Moon as sovereign territory under the Outer Space Treaty. Understanding what that means—and what it does not mean—takes space-law literacy: the ability to distinguish territorial sovereignty from exploration, resource extraction, and ownership of equipment.

Can a country claim part of the Moon?

No. Article II of the Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, including the Moon and Other Celestial Bodies—usually called the Outer Space Treaty—says: “Outer space, including the moon and other celestial bodies, is not subject to national appropriation by claim of sovereignty, by means of use or occupation, or by any other means.”

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That rule bars a nation from turning lunar territory into its own through a declaration, occupation, or use. A base, flag, or period of presence does not confer sovereignty over the ground around it.

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The treaty also establishes freedom to explore and use space on a basis of equality, and says those activities should be carried out for the benefit and interests of all countries. Freedom to use the Moon is therefore not the same thing as owning it. The Outer Space Treaty, which entered into force in October 1967, is described by the UN Office for Outer Space Affairs (UNOOSA) as the basic framework of international space law.

Does that mean everything on the Moon is ownerless?

No. Article VIII draws a distinction between territory and human-made objects. Ownership of an object launched into space, or of one constructed on a celestial body, is not affected by its presence there; the same applies to the object’s component parts.

A state or operator can therefore retain ownership of a lander, rover, habitat, or other equipment without owning the lunar land beneath it. Article VIII does not grant a territorial claim, and the prohibition on claiming territory does not automatically make equipment ownerless.

Who is responsible when a private company operates on the Moon?

Private operators are not outside the treaty framework. Under Article VI, states bear international responsibility for their national activities in outer space, including activities by non-governmental entities. A state must authorize and continually supervise those private activities.

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That makes national licensing and oversight part of the legal picture: a company may conduct an operation, but its state has treaty responsibilities for the activity. The treaty does not make a private operator a sovereign authority over the place where it works.

Can companies mine the Moon, and who owns the resources?

The Outer Space Treaty’s ban on national appropriation is clear about sovereignty over territory. How that principle applies to extracting and using lunar resources is a more contested interpretive and policy question. The treaty language does not, by itself, settle every question about rights to extracted material.

Artemis Accords signatories state that extracting space resources does not inherently constitute national appropriation under Article II, provided related activity and contracts are consistent with the treaty. That is the signatories’ interpretation, not a judicial ruling or a universally accepted resolution of the debate. A 2023 UN working paper reproduces this position in its discussion of Section 10 of the Accords.

So the careful answer to “Who owns lunar resources?” is that the legal position is not as settled as the answer to “Who owns the Moon?” The treaty bars national ownership of lunar territory; the implications for particular resource activities remain subject to interpretation and policy development.

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Why can lunar operations involve consultation?

Article IX requires states to act with due regard for the corresponding interests of other states. It also calls for appropriate international consultations when a state has reason to believe a planned activity could cause potentially harmful interference with another state’s peaceful exploration or use of space.

That provision matters when lunar operations could affect others, but it should not be mistaken for a grant of territorial sovereignty. An operational practice or coordination measure does not, by itself, give a state ownership of the surrounding lunar area.

What skill helps you make sense of the debate?

Space-law and policy literacy means reading the treaty closely and separating four questions that are often blurred together: who may explore or use the Moon, whether territory can be claimed, who owns equipment, and how resource extraction should be treated.

It also means keeping the source of a claim clear. Treaty text, a state’s domestic rules, and the Artemis Accords signatories’ interpretation are not interchangeable. For country-by-country treaty membership, consult UNOOSA’s live treaty-status page: it is updated through depositary notifications, and its listed annual compilation is dated 1 January 2025.

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University courses show that this is a subject people can study systematically. The University of Warsaw’s course description covers space mining and legal instruments; Michigan Law describes resource extraction and ownership on the Moon and other celestial bodies; and the University of Sydney’s 2026 unit includes resource exploitation, sustainability, and the adequacy of existing law.

For further reading, Luiss’s 2026/2027 Space Law course lists Tanja L. Masson-Zwaan and M. Hofmann’s Introduction to Space Law, fifth edition (Kluwer, 2025), as its course book.

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Artemis Accordslunar resourcesMoonOuter Space Treatyspace law

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