GrammarFacts

atmospherereadonly

hasOceanreadonly

Whether the world has standing liquid.

It is here for one reason and it is not decoration: water is the leading explanation for why Earth has plate tectonics and Venus, the same size and the same age, does not. A wet lithosphere is weak enough to subduct. So the ocean decides the plate count, and a dry Venus-sized world comes out with a stagnant lid and two enormous shields on it.

massreadonly

meanRadiusreadonly

(a·b·c)^(1/3) — the radius a density divides by.

publishedReliefreadonly

Measured relief, used verbatim where somebody has published it.

docs/design/art.md is explicit that the data is not negotiable: Olympus Mons really is 21.9 km and the generator does not get a vote. Null on every body nobody has flown past, which is the whole galaxy outside Sol.

reliefSpentreadonly

How much of the strength limit this world has actually spent, 0..1.

The one relief number that is a draw rather than a derivation, and it is bounded tightly on purpose: the limit is physics, and this says only that two worlds of the same size are not identically mountainous. Zero means no surface at all, which is what a gas giant passes.

temperaturereadonly

Equilibrium temperature, Kelvin.

tidalProxyreadonly

tidalProxy against the primary — zero for a planet.

The star is not the primary. Passing the star's mass would call every planet tidally active, which is the mistake surfaceArchetype documents.