Explore how big countries really are by placing them on the surface of the Moon.
Select any country from the list to see its true outline projected onto the lunar landscape in 3D.
How big is Russia on the Moon?
Russia, the largest country on Earth at over 17 million km², would cover roughly a quarter of the Moon's visible surface. Use the interactive globe to see exactly how it compares.
Compare country sizes in Flat or Curved mode
Switch between Flat mode — which shows the country as a filled polygon projected onto a tangent plane —
and Curved mode, which wraps the border directly onto the Moon's surface using spherical geometry,
giving the most accurate size comparison for large countries like Canada, the USA, China, and Brazil.
About the Moon
The Moon has a radius of approximately 1,737 km, compared to Earth's 6,371 km.
This means the Moon's surface area is about 13.5 times smaller than Earth's.
Countries are scaled by the ratio of these radii (~3.67×) so their angular extent on the Moon
matches their real angular extent on Earth.
Area
Population
About
Countries on the Moon is an interactive 3D visualisation that places any country's outline onto the surface of the Moon, letting you compare its true size against the lunar landscape.
Built with Three.js and GeoJSON data from Natural Earth. Country polygons are projected using a spherical rotation algorithm that preserves shape and area at any scale.
How it works
Select a country from the dropdown. Its polygon is loaded from Natural Earth GeoJSON data and projected onto the Moon's surface.
Curved mode — each vertex is placed directly on the sphere using a spherical rotation, so the outline hugs the Moon's surface regardless of the country's size.
Flat mode — the polygon is projected onto a tangent plane at the subsolar point, giving a more classical map-like appearance with a filled silhouette.
The country is scaled from its real Earth size using the ratio of Earth's radius (~6,371 km) to the Moon's radius (~1,737 km).
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