Planets & Moons

Home Planet

Every account starts with a home planet fixed at 163 fields. Some universes offer an expanded homeplanet (+20 fields). The home planet cannot be deleted — if you abandon it, your first colony becomes the new home.

Some experienced players abandon the homeplanet entirely once they find a larger colony, especially in high-economy-speed universes.

Colonies

Colonies expand your production and raiding range. They require Astrophysics research.

Max colonies formula:

$$\text{Colonies} = \lfloor(\text{Astrophysics} + 1) / 2\rfloor$$

There is no hard cap — you can keep researching Astrophysics for more colonies, limited only by the exponentially increasing cost and research time.

Astrophysics Requirements by Slot

Slot	Minimum Astrophysics Level
4–12	1
3, 13	4
2, 14	6
1, 15	8

How to Colonize

1. Build a Colony Ship (requires Shipyard lv 4 + Impulse Drive lv 3)
2. Open Galaxy view and find an empty slot
3. Send the colony ship — it is consumed on arrival if successful
4. Resources sent with the colony ship remain on the new planet

Abandoning a Colony

Overview → select planet → gear icon → Give up / Rename → Abandon colony. Confirm the coordinates and click — do not press Enter. All resources and ships on the planet are permanently lost.

---

Planet Size & Temperature

Planet size (fields) and temperature are determined by slot position in the solar system. Both affect your long-term production.

Position Reference Table

Slot	Min Fields	Avg Fields	Max Fields	Min Temp	Avg Temp	Max Temp	Production Bonus
1	96	134	172	220°C	240°C	260°C	+40% Crystal
2	104	140	176	170°C	190°C	210°C	+30% Crystal
3	112	147	182	120°C	140°C	160°C	+20% Crystal
4	118	163	208	70°C	90°C	110°C	—
5	133	182	232	60°C	80°C	100°C	—
6	146	194	242	50°C	70°C	90°C	+17% Metal
7	152	200	248	40°C	60°C	80°C	+23% Metal
8	156	204	252	30°C	50°C	70°C	+35% Metal
9	150	198	246	20°C	40°C	60°C	+23% Metal
10	142	187	232	10°C	30°C	50°C	+17% Metal
11	136	173	210	0°C	20°C	40°C	—
12	125	156	186	−10°C	10°C	30°C	—
13	114	143	172	−50°C	−30°C	−10°C	—
14	100	134	168	−90°C	−70°C	−50°C	—
15	90	127	164	−130°C	−110°C	−90°C	Highest Deuterium

Field Modifiers

• Terraformer: +5 fields per level (+6 at odd levels), but occupies 1 field itself
• Discoverer class: +10% planet diameter (not directly +10% fields)
• Researcher alliance class: +5% planet diameter
• Premium shop: planet fields purchasable with Dark Matter
• Colonies below 200 fields are generally not worth keeping long-term; 200+ is the practical minimum

---

Colony Placement Strategy

Before colonizing, decide what the planet is for — mining, raiding, fleetsaving — as this affects which slot matters most.

Spread (recommended for most players)

Place colonies across different systems and galaxies to maximize your phalanx coverage and farming radius.

Pros: Wide attack range, hard to farm by one player, full phalanx coverage
Cons: High deuterium transport costs, longer travel times between colonies

Clustered

Place colonies in the same system or close together.

Pros: Instant deployments, minimal deuterium cost
Cons: One player can IPM all your planets, tiny farming area

Mixed (two colonies in the same system)

Keep one pair of colonies in the same system for safe deployment fleetsave between moons.

Pros: The safest fleetsave method (moon-to-moon deployment)
Cons: Sacrifices one farming zone

---

Planet Relocation

Planets can be moved using Dark Matter. Cost: 240,000 Dark Matter per relocation (charged only on success).

Relocation Rules

Current Slot	Can Move To
1–3 or 13–15	Any slot (1–15)
4–12	Slots 4–12 only

How It Works

1. Go to Galaxy view, enter target coordinates, click the relocation icon
2. A 24-hour countdown begins — the timer shows green (will succeed) or red (blocked)
3. The planet moves at the end of the timer only if there are no active buildings, research, or fleet movements at that moment
4. If blocked, cancel the blockers before the timer expires

What Changes and What Doesn't

• Changes: Temperature, planet picture, solar satellite energy output, deuterium production
• Stays the same: Planet size (fields)
• All ships on the planet travel to the new coordinates via deployment at no deuterium cost (invisible to phalanx)
• The moon moves with the planet
• Jump Gate on the moon is unavailable for 24 hours after the move
• Cannot relocate with Vacation Mode active

---

Moons

Moons are the most important tactical asset in OGame. A fleet on a moon cannot be detected by enemy Sensor Phalanx, making fleetsaving far more secure than saving from a planet.

How Moons Form

A moon can form after any battle if a debris field is created above a planet. The chance is:

$$\text{Moon chance} = \min\left(\frac{\text{debris field (units)}}{100{,}000}, 20\right)\%$$

• Maximum moon chance is 20% (capped at 2,000,000 resource units in the debris field)
• A successful 20% moon always produces a moon ≥ 8,366 km — much harder to destroy
• Debris fields below 2,000,000 units produce moons of random size if the chance succeeds
• Only one moon per planet

You can also purchase M.O.O.N.S. from the premium shop for a moonshot without another player's involvement — expensive and still not guaranteed.

What to Build on a Moon

Moons start with 1 field. Build Lunar Base first — it consumes that 1 field but unlocks 3 more (net +2 usable). Upgrade Lunar Base whenever only 1 field remains free.

Recommended build order:

1. Lunar Base (repeat as needed to expand fields)
2. Robotics Factory (speeds up all other construction)
3. Sensor Phalanx (core tactical tool)
4. Jump Gate (instant inter-galaxy fleet movement)
5. Optional: Shipyard + some defense to deter moon destruction

Storages (Metal/Crystal/Deuterium) serve no purpose on a moon — you cannot produce resources there.

---

Sensor Phalanx

The Sensor Phalanx lets you scan enemy planets within range and see incoming/outgoing fleets. Range formula:

$$\text{Range} = \text{level}^2 - 1 \text{ systems}$$

A level 3 phalanx covers 8 systems in each direction. Each scan costs 5,000 deuterium.

What the Phalanx Can See

Scanning the origin planet:

• Attack, ACS attack, transport, espionage, hold (ACS), harvest, colonise, moon destruction missions
• Fleets recalled from most missions
• Return time (not arrival time at target)

Scanning the target planet:

• Deployment missions (arrival time shown)
• Incoming attacks, transports, espionage
• Recalled deployments are not visible

What the Phalanx Cannot See

• Fleets on deployment from the origin planet
• Recalled deployment missions
• Any fleet movement from or to a moon
• Debris fields

---

Jump Gate

The Jump Gate allows instant travel between two moons you own, with no deuterium cost. Cooldown: 1 hour (adjusted by universe speed and Jump Gate level since v5.6.2).

• Resources cannot be sent through a Jump Gate — use cargo ships on normal fleet missions for that
• Make sure the destination moon has enough deuterium for the fleet to fly elsewhere after jumping
• Jump Gates are deactivated for 24 hours after a planet relocation

---

Moon Destruction

An enemy can attempt to destroy your moon using Deathstars. If successful, no debris field is created. The chance formulas:

$$\text{Moon destruction chance} = 1 - \sqrt[100]{\left(1 - \frac{\sqrt{\text{moon diameter (km)}}}{2500}\right)^{\text{Deathstars}}}$$ $$\text{Deathstar survival chance} = 1 - \sqrt[100]{\left(\frac{\sqrt{\text{moon diameter (km)}}}{2500}\right)^{\text{Deathstars}}}$$

---

Moonshots & Pushing Rules

Deliberately crashing fleets to create a moon must respect your universe's pushing rules.

Scenario	Rule
Moonshot swap (both players crash equal-value fleets at each other)	No ticket needed; each keeps their own DF
Buying a moonshot (paying higher-ranked player)	Ticket required; max payment = fleet cost + deuterium − DF value
Paying lower-ranked player	Can send full resources needed; lower-ranked player keeps the DF
Free moonshot	Legal; moonshot account player must keep the DF if ranked lower

Light Fighters are the standard moonshot fleet — cheap to build, easy to destroy with a few Cruisers or moderate defense. Use a battle simulator to confirm your defense can kill the incoming fleet.