Celestial Biome Tags

Celestial Biome Tags provides a common set of biome tags for planets, moons, and other extraterrestrial environments in Minecraft.

The goal of this project is to establish a simple convention that mods and datapacks can use to identify celestial biomes without depending on biome IDs from a specific space mod.

Built-in support is currently provided for Ad Astra.

Why?

Space mods usually define their own biome IDs, but other mods and datapacks often need a generic way to target locations such as:

• Mars
• Venus
• The Moon
• Any planet
• Any moon
• Any extraterrestrial surface
• Space / orbital environments

Instead of targeting a specific biome:

ad_astra:martian_wastelands

a mod or datapack can target:

#c:planets/mars

This allows multiple space mods to use the same convention.

For example, another mod that adds a Mars biome can add it to #c:planets/mars, and existing datapacks using that tag will automatically recognize it as part of Mars.

Convention

Celestial Biome Tags currently defines the following biome tags:

#c:planets
├── #c:planets/earth
├── #c:planets/mercury
├── #c:planets/venus
├── #c:planets/mars
└── #c:planets/glacio

#c:moons
└── #c:moons/moon

#c:space
└── #c:space/orbits

There are also two broad convenience tags:

#c:extraterrestrial_surfaces

Contains celestial surface biomes outside Earth.

This includes supported planets and moons, but does not include orbital/space biomes.

#c:extraterrestrial_biomes

Contains all supported extraterrestrial biomes, including both celestial surfaces and space/orbital environments.

Ad Astra Support

The following Ad Astra biomes are currently mapped to the convention.

Mercury

#c:planets/mercury

ad_astra:mercury_deltas

Venus

#c:planets/venus

ad_astra:venus_wastelands
ad_astra:infernal_venus_barrens

Mars

#c:planets/mars

ad_astra:martian_wastelands
ad_astra:martian_canyon_creek
ad_astra:martian_polar_caps

Glacio

#c:planets/glacio

ad_astra:glacio_snowy_barrens
ad_astra:glacio_ice_peaks

Moon

#c:moons/moon

ad_astra:lunar_wastelands

Orbit

#c:space/orbits

ad_astra:orbit

For Mod and Datapack Developers

You do not need to depend on Celestial Biome Tags to adopt this convention.

Simply add your biomes to the appropriate tag under the c namespace.

For example, if your mod adds another biome to Mars:

data/c/tags/worldgen/biome/planets/mars.json

{
  "replace": false,
  "values": [
    "your_mod:your_mars_biome"
  ]
}

Anything targeting:

#c:planets/mars

can then recognize your biome without knowing its specific biome ID.

When introducing support for a celestial body that does not yet have a tag, follow the existing hierarchy where possible:

#c:planets/<planet>
#c:moons/<moon>
#c:space/<environment>

Example Usage

A NeoForge biome modifier can target all Mars biomes using:

{
  "biomes": "#c:planets/mars"
}

Similarly:

#c:planets

targets planetary biomes,

#c:moons

targets moon biomes, and

#c:extraterrestrial_surfaces

can be used when something should apply broadly to extraterrestrial surfaces without also affecting orbital environments.

Compatibility

Current target:

• Minecraft 1.21.1
• NeoForge
• Ad Astra 1.16.26

Ad Astra is not intended to define the convention itself. Celestial Biome Tags acts as a compatibility implementation for Ad Astra while exposing tags that other mods and datapacks can also adopt.

License

This project is licensed under the MIT License.