🚀 Rebuild Astral Placeholder
To the stars. Leave Earth behind, build your rocket, and explore an entire solar system — from lunar dust to the acid storms of Venus.
Rebuild Astral Placeholder is a complete space exploration mod: rocket building, pressurized suits, oxygen management, and the colonization of hostile planets. Lightweight, optimized, and built with modpacks in mind.
🪐 Worlds to Explore
Board your rocket (4 tiers) and touch down on unique planets — each with its own terrain, hazards, and resources:
| Planet | Atmosphere | Main Hazard |
|---|---|---|
| 🌑 Moon | Grey regolith, craters, moon cheese | No oxygen, extreme cold |
| 🔴 Mars | Red deserts, canyons, ancient ruins | No oxygen, freezing cold |
| 🟡 Venus | Sulfur wastes, volcanoes | No oxygen, extreme heat, acid rain |
| ☿ Mercury | Scorched plains, molten fields | No oxygen, blistering heat |
| ❄️ Glacio | Frozen tundra, blue ice, blizzards | Biting cold |
…plus Earth orbit and planetary orbit stations to set up between hops.
🌬️ Survive the Void
Space wants you dead. Come prepared:
- Oxygen system — fill oxygen tanks, deploy Oxygen Distributors to pressurize a base, and breathe easy inside sealed rooms.
- Temperature & hazards — extreme heat, deep cold, and acid rain will tear through the unprepared.
- Space Suits — from the basic Space Suit to the Netherite Space Suit and the flight-capable Jet Suit.
🛠️ Build Your Space Program
A full tech progression from first launch to deep-space industry:
- 🚀 NASA Workbench to assemble rockets
- 🛢️ Fuel Refinery, Oxygen Loader, generators (coal, compressor, energizer)
- 🔋 Energy & fluid networks via cables and fluid pipes
- 🚙 Rovers to cross the wastes
- ⛏️ New ores & materials: Desh, Ostrum, Calorite, Etrium, Ice Shard, Cheese and more
👾 Alien Life
The planets aren't empty. Watch for Lunarians and their corrupted kin, Star Crawlers, Martian Raptors, Pygros, Moglers, Sulfur Creepers, Glacian Rams, and more.
✨ Why Rebuild Astral Placeholder?
- 🪐 A cohesive, hand-crafted solar system — not just reskinned dimensions
- 🧩 Clean, lightweight, modpack-friendly
- 🎨 Gorgeous custom skies, planets, and atmospheres
- 🔧 Deep but approachable tech tree
Suit up. Fuel up. Launch. The stars are waiting. 🌌

