Sections
Space
Rockets, the Moon and orbital stations, then the interplanetary ship, the nine worlds of the Solar System and the Sun.
The next step is up there: build a rocket part by part and fly it to the Moon, build ships and stations in orbit, then cross the Solar System world by world, from Mars to Pluto, and end the game on the Sun.
Guide pages
How to play
- SpaceRocketsBuild a rocket in Openworld: the parts, methane, kerosene and hydrogen with their Isp, the delta-v you get from 1 to 4…
- SpaceThe MoonFly to the Moon in Openworld: the delta-v for each leg, landing and coming home, low gravity, labyrinths, crater…
- SpaceOrbital shipsBuild a base in orbit in Openworld: the 64 m ship cube, central and secondary docks, docking a rocket, gravity…
Wiki pages
Everything in this section
Items 68
- Aresite alloy
- Brass pressure suit
- Cargo module
- Central dock
- Clean room
- Clean room console
- Colonist's logbook
- Cytherite alloy
- Dewar of helium-3
- Dewar of RP-1
- Dust felt
- Empty dewar
- Flight gear
- Glacite
- Glacite alloy
- Glacite-hearted diamond
- Golem heart
- Hadesite
- Hadesite alloy
- Hermesite
- Hermesite alloy
- Inertial unit
- Interplanetary drive
- Jetpack
- Jovite
- Jovite alloy
- Kronite
- Kronite alloy
- Lunar aluminium (anorthosite)
- Lunar feather
- Lunar glass (regolith)
- Lunar propellants (Moon ice)
- Lunar titanium (ilmenite)
- Lunar wood
- Lunite
- Lunite alloy
- Martian polar ice
- Maw plate
- Meteoric steel
- Methane plant: inner system fuel
- Navigation table
- Pilot's console
- Probe recorder
- Propellants
- Regolith concrete
- Rocket cockpit
- Rocket engine
- Rocket fairing
- Rocket parts
- Rocket tank
- Satellite
- Satellite deployer
- Secondary dock
- Ship's engine
- Ship's fuel tank
- Sky saddle
- Solar matter
- Space suit
- Submarine
- Suited for the planets
- Survey sensor
- Telescope
- Thermal suit
- Titan's methane: fuel of the far reaches
- Tritonite
- Tritonite alloy
- Tritonite crystal
- Ultimate solar suit
Machines 7
- Fueling tower
- Gravity generator
- Helium-3 extractor
- Lightning probe
- Ring collector
- Solar altar
- Thermal crucible
How the game works 52
- A colonists' base
- Acid squall
- Autopilot: into orbit
- Black smokers
- Boat on the lakes of Titan
- Collapse: black hole
- Credits: the Patreon supporters
- Cross the day side
- Descent into the Sun
- Europa: a submarine under the ice
- Explore Mars
- Fire tornadoes
- Flight plan
- Floating city in the clouds
- Gear for Mercury
- Gear for Venus
- Glide in Neptune's winds
- Ground station
- Interplanetary ship
- Jupiter's orbit: gravity assist
- Land on Mars
- Landing on the launch pad
- Lunar creatures
- Lunar industry
- Martian dust storm
- Miranda: the 20 km cliff
- Molten metal pools
- Moon landing
- Navigate in orbit
- Pluto's ancient ruins
- Raisonite shards of the asteroids
- Release the satellite
- Reprogram a colonist drone
- Reusable rocket
- Set foot on the burning ground
- Ship
- Station in the Sun's orbit
- Survive: lava, fire tornadoes, meteors
- The diamond rain
- The eternal night
- The great Miranda jump
- The planets' dangers
- The secret of the ruins
- The shuttle: land, then back up
- The twilight line
- Titan: flying with wings
- Top of the giant volcano
- Triton: nitrogen geysers
- Voyage to a community asteroid
- Wake up: the Big Bang
- Wild asteroids
- Zero g
Goals 10
- Automated space program
- Earth ↔ station shuttle
- Earth-to-Earth flight
- First contact
- Fly everywhere
- Homecoming
- Moon base
- Orbit
- Rocket ready
- Satellite in orbit
Worlds 12
Reference
The game's numbers
Propellants and Δv
| Propellant | Density (kg/m³) | Boils at | O/F ratio | Isp sea level / vacuum |
|---|---|---|---|---|
| Liquid oxygen (LOX) | 1141 | 90.2 K | — | — |
| Liquid methane (CH4) | 423 | 111.7 K | 3.6 | 327 / 350 s |
| RP-1 kerosene | 810 | 489 K | 2.56 | 282 / 311 s |
| Liquid hydrogen (LH2) | 71 | 20.3 K | 6 | 366 / 452 s |
| Tanks | CH4 | RP-1 | LH2 |
|---|---|---|---|
| 1 | 5746 m/s 26.7 t | 5624 m/s 31.6 t | 4692 m/s 14.4 t |
| 2 | 7232 m/s 49.3 t | 6983 m/s 59.2 t | 6293 m/s 24.8 t |
| 3 | 8000 m/s 72 t | 7680 m/s 86.8 t | 7163 m/s 35.2 t |
| 4 | 8481 m/s 94.7 t | 8115 m/s 114.4 t | 7718 m/s 45.6 t |
| Tank volume | 26 m³ |
|---|---|
| Tanks | 4 |
| Cargo modules | 2 |
| Slots per cargo module | 36 |
| Engine mass flow | 340 kg/s |
| Max acceleration | 4 g |
| Rocket radius | 1.5 m |
| Standard gravity | 9.81 m/s² |
Orbital ships
| Buildable cube | 64 m |
|---|---|
| Docks per station | 10 |
| Docking range | 2000 m |
| Max docking speed | 20 m/s |
| Max artificial gravity | 2 g |
| Engines | 4 |
| Tanks | 16 |
| Consoles | 4 |
| Engine tank | 12 m³ |
| Fuel tank | 48 m³ |
| Hull mass | 40000 kg |
| Engine mass | 4000 kg |
| Tank mass | 2500 kg |
| Console mass | 500 kg |
| Dock module | 3 m |
| Between docks | 8 m |
| Dock booking | 180 s |
The Sun, the Earth and the Moon
| Body | Radius | Gravity | Orbits | Orbit radius | Year / orbit | Day | Axial tilt | Air |
|---|---|---|---|---|---|---|---|---|
| Sun | 109245 km | 274 m/s² | — | — | — | 10.4 h | 7.25° | — |
| Earth | 1000 km | 9.81 m/s² | Sun | 23481066 km | 6.3 days | 25 min | 23.44° | ✓ |
| Moon | 273 km | 1.62 m/s² | Earth | 60336 km | 11.4 h | always shows the same face | 0° | — |
Sections
Other sections
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Getting started
Your first game, the controls, the interface, your first day and your first night.
-
Survival
Health, food and calories, air, falls, difficulty, death and respawn.
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Mining & resources
Tools and their tiers, ores, veins, geodes, giant lodes, oil, liquids and buckets.
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Crafting & machines
The 3 × 3 grid, ingredient families, furnaces, smelting, alloys and every machine.
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Building
25 cm raw matter, 1 m blocks, shapes, doors and locks, the architect desk.
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Technology
Power, cables, pipes, conveyors, shafts, logic, sensors, radio and automation.
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Farming & animals
Crops, gathering, taming, breeding, shearing, milk, eggs and beehives.
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Creatures
The bestiary: every species, what it gives, how dangerous it is, and which ones you can tame and ride.
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World
Biomes, trees, terrain, the two world layouts, caves, weather, day and night.
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Combat & gear
Weapons, armor, projectiles, paraglider, wingsuit and base jump.
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Decoration
Furniture, textiles and dyes, lighting, ornaments and signs.
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Multiplayer & servers
Solo worlds, LAN, the global network, servers, commands.