Create Cosmonautics Expansion
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
This space mod adds more planets and other space-related content to the game. It gives you new places to explore, along with extra items and features that…
⬇ Download on Modrinth
Summary:
Explore new planets, discover new items, and experience more adventures in space. This addon expands the game with extra worlds, new content, and more things to explore, making every journey feel bigger and more exciting.
Content:
- Mars
Planned Content:
- Solar system Planets
- Oxygen System
- Civilization
- Space Stations
- Shader Support
Dependencies
- Create
- Create Aeronautics
- Create Cosmonautics
Credits:
- DevX
If you have an suggestion/bug for the mod, you can let me know on the cosmonautics Discord server and ping .dev_x in the dedicated channel!
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as rocketnautics_addon-1.0.0.jar — drop this file into the mods folder
- Download size: 301 KB
- Download link checked 1 Oct 2026 — working
These come from our own check of the pack file, not from the source page.