
AstroChem
Add-on Mod for Ad Astra, Alchemistry, and ChemLib
Screenshots

About this Mod
A Compatibility Mod for Ad Astra, Alchemistry, and ChemLib.
All recipes have been balanced to work with the ad astra and alchemistry progression systems; the space metals utilize f-transition and post-transition metals to ensure the player has either reached space to find the ores or they have spent a substantial amount of time building their fission and fusion reactors on Earth to gather the chemicals to synthesize the space metals on earth. Below are the additions the mod makes currently:
Adds dissolving recipes for all space metals from Ad Astra (Desh, Ostrum, and Calorite).
Adds space metal dusts and ways to combine and synthesize the space metals(Needs materials only obtainable through fusion and fission reactors)
Adds dissolving and compacting recipes for all space stones, cobblestones, sands, perma-frost blocks, and conglomerates.
Allows loading of Oxygen, Fuel, and Cryo-fuel buckets with chemlib elements.
Adds ways to synthesize fuel and cryo-fuel chemically in alchemistry machines with some new chemicals to aid in the added recipes.
Adds dissolving and combining recipes for cheese and cheese blocks.
There is no wiki or guidebook for the added recipes, you are expected to use JEI, REI, MEI, or something similar to view and learn the recipes in-game as they will work through those systems.
Available Versions
How to Install AstroChem on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.20.1).
Install Mod
Open the mod browser in the dashboard and search for "AstroChem". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.20.1, 1.19.2
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
AstroChem server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.20.1). You can switch loaders with one click in the panel.
Is AstroChem compatible with fabric and forge?
AstroChem officially supports fabric, forge for Minecraft 1.20.1, 1.19.2. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with AstroChem – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if AstroChem consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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Rent Modded Server
Install AstroChem with just one click on your server.