One physical scale · Earth to Moon

The interesting space begins at Earth and ends at the Moon.

Earth and Moon use their real relative radii, separation, and inertial positions. The Sun is a fixed celestial disc: it supplies direction, angular size, and light, but occupies no modelled distance.

One scale Earth, Moon, their separation, and both shadow cones share the same uniform scale.

Celestial Sun A separate sky plane preserves its physical direction and apparent diameter without rendering 150 million kilometres.

Free flight Navigation has no fixed target, world-up pole, collision wall, or maximum travel distance.

How can a flat Sun still make exact cones?

Cone slopes depend on the Sun’s angular radius and the physical Sun–Moon distance, not on drawing a solar sphere. Shadowline keeps those quantities in the calculation while the renderer shows only the resulting distant disc.

Surface imagery: NASA Blue Marble Earth · NASA LRO Moon

Penumbra Umbra Surface footprint Sun direction

12 August 2026 17:45:47 UTC

Calculating alignment… —

Geometry 1 uniform Earth–Moon scale No adjustable spacing

Earth–Moon —

Moon distance —

Solar disc —

Drag to look · Scroll or WASD to fly · Q/E to roll · VR thumbsticks fly

Placing Earth and Moon at physical scale…