Dimensions and celestial bodies

Celestial bodiesCopy Anchor Link

The solar system is defined in code: 32 bodies with their hierarchy, orbits, rotation, gravity, sun power and default traits. Ten bodies have a dimension: Kerbin, shown as Earth, is minecraft:overworld, and Moho, Eve, Mun, Minmus, Duna, Ike, Dres, Laythe and Tekto use hbmspace:<body>. hbmspace:orbit holds orbital stations. A datapack cannot add, remove or change a body; gravity, atmosphere, sky, travel and radiation treat any other dimension, including hbmspace:thatmo, as Kerbin. Live state such as atmosphere composition and temperature is world save data.

Data controls each body's dimension and dimension type, its timelines, biomes, terrain settings, carvers, features and structures, the reserves and travel settings, atmospheric reactions and bedrock-ore rows.

DimensionsCopy Anchor Link

Each surface body's dimension type is hbmspace:<body>, with the body's world clock hbmspace:<body> and the timelines hbmspace:<body>_day and hbmspace:<body>_villager_schedule. The day timeline's period_ticks and sun-angle keyframes set the body's day length and sun path at runtime, for the sky, solar power and day–night logic. Space overrides some environment attributes in code, such as sky, fog and cloud colours, star brightness and sky light, so data values for them may be replaced.

TerrainCopy Anchor Link

Body terrain uses minecraft:noise generators with Space's biome source and density functions. The router's temperature is the body's celestial biome map, and chunk_surface_level and final_density follow the celestial relief. Mun, Laythe, Tekto and Thatmo carve noise caves through hbmspace:noise_caves at noise_router.final_density. Surface rules under material_rule use Space's material conditions.

Relief heights and the celestial biome IDs are Java tables: a new dimension can reuse an existing body's layers and biomes but cannot add celestial biomes. Some behaviour is keyed to IDs: Duna's terraces to noise settings hbmspace:duna, crater grounding of Mun and Minmus bases to hbmspace:mun and hbmspace:minmus, and the Martian base to the hbmspace:martian world preset.

A body whose default_fluid is a solid block other than default_block, with a router using Space's density functions, treats that block as its sea during the surface pass; Mun uses basalt and Minmus smooth Minmus rock.

World presetCopy Anchor Link

hbmspace:martian is an Overworld preset with noise settings hbmspace:martian, listed in #minecraft:normal. It sends each joining player to Duna once and enables the Martian base.