# Moon

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Should a gigantic battle occur in the vicinity of a planet, there is a slight chance that the debris scattered in the planet's gravity field will condense into a solid, subzero, somewhat smaller satellite. In short: a moon.

A Moon is special because it is the only place where the Lunar Base, Sensor Phalanx, and the Jump Gate can be constructed. The lunar base must be built first to provide three fields for other buildings.

Moons are important because they allow you to invisibly fleetsave where the Sensor Phalanx cannot see.

The following buildings can be constructed on a moon:

*Storage useful only for scrap merchant, and that is hardly enough reason to build it and waste slots.

Resource mines, Research Lab, Nanite Factory, Terraformer, and Missile Silo cannot be built on a moon.

As long as the required Shipyard level is constructed, any Defenses can be built on a moon. Just like on a Planet, constructed defenses do not use up fields.

Since OGame 0.78a, IPMs can be used to destroy defenses on a moon and ABMs from the planet will defend the moon in those cases.

It is possible to build storage tanks on the surface, but bear in mind moons cannot produce any resources. Building slots on a moon are very expensive and must be put to careful use.

## ObtainingEdit

Having a moon is so desirable for success in OGame that many players team up to organize a series of moonshots until they get one. Because the largest default chance any single attack can have at forming a moon is 20%, it can often take many moonshots in order for a moon to form on the desired planet.

Please note: On Barym, as it is a special server with 40% of resources to debris field, these numbers are reduced by 1/4. So for a 20% chance using Battleships instead of 112 it would be 84, etc. Ultimately, the size of the debris field is the indicator of the odds of a moon. 100k resources in the DF per 1% chance - and deuterium normally does not go into the DF.

Higher % of resources to debris field universes make trading moonshots much easier, as less of the resources invested are lost for a given moonshot. The high resources in the Debris Field also make other players look to recycle your ships.

Probability of moon formation from ship debris
Ship 1% 2% 3% 4% 5% 6% 7% 8% 9% 10% 11% 12% 13% 14% 15% 16% 17% 18% 19% 20%
Small Cargo Ship 84 167 250 334 417 500 584 667 750 834 917 1,000 1,084 1,167 1,250 1,334 1,417 1,500 1,584 1,667
Large Cargo Ship 28 56 84 112 139 167 195 223 250 278 306 334 362 389 417 445 473 500 528 556
Light Fighter 84 166 250 334 417 500 584 667 750 834 917 1,000 1,084 1,167 1,250 1,337 1,417 1,500 1,584 1,667
Heavy Fighter 34 67 100 134 167 200 234 267 300 334 367 400 434 467 500 534 567 600 634 667
Cruiser 13 25 37 50 62 75 87 99 112 124 136 149 161 173 186 198 210 223 235 247
Battleship 6 12 17 23 28 34 39 45 50 56 62 67 73 78 84 89 95 100 106 112
Colony Ship 12 23 34 45 56 67 78 89 100 112 123 134 145 156 167 178 189 200 212 223
Recycler 21 42 63 84 105 126 146 167 188 209 230 250 271 292 313 334 355 375 396 417
Espionage Probe 334 667 1,000 1,334 1,667 2,000 2,334 2,667 3,000 3,334 3,667 4,000 4,334 4,667 5,000 5,334 5,667 6,000 6,334 6,667
Bomber 5 9 14 18 23 27 32 36 40 45 49 54 58 63 67 72 76 80 85 89
Solar Satellite 167 334 500 667 834 1,000 1,167 1,334 1,500 1,667 1,834 2,000 2,167 2,334 2,500 2,667 2,834 3,000 3,167 3,334
Destroyer 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58 61
Death Star - - - - - - - - - - - - - - - - - - - 1
Battlecruiser 5 10 15 20 24 29 34 39 43 48 53 58 62 67 72 77 81 86 91 96

## DestroyingEdit

A moon can be destroyed by a fleet of Deathstars. If there is any fleet or defense, the attacker must win first then the moon destruction chance begins.  A draw or loss by the attacker will send any surviving Deathstars back with no moon destruction. Regardless of if the moon is destroyed or not, there is a chance that the moon will destroy the Deathstars. The formulae are provided below. It is important to note that when a Moon, the Deathstars, or both are destroyed there is NO debris field created in the moon destruction mission.

Moon Destruction Results: There are 4 possible outcomes for a moon destruction mission:

1. Moon survives, Fleet survives
2. Moon survives, Fleet is destroyed
3. Moon is destroyed, Fleet is destroyed
4. Moon is destroyed, Fleet survives

## FormulaeEdit

Key:
S = Size of the moon (Km)
D = number of Deathstars

Chance to destroy moon (in percentage)= $( 100-\sqrt{S} )\times\sqrt{D}$

Chance the deathstar* is destroyed (in percentage)= $\frac{\sqrt{S}}{2}$

Before deathstars destroy a moon, they have to fight with fleets and defences on the moon. There is almost always a greater chance that the deathstar(s) will be destroyed than the moon - however, take for example a size 8944 moon being attacked by 100 deathstars. There is a 54.27% chance that the moon will be destroyed yet a 47.29% chance the deathstars will be destroyed. Additionally, any number of deathstars greater than 339 causes a claimed chance greater than 100% of moon destruction.

'*this is a single roll for the entire fleet

The Size of the Moon used to have an impact on how many fields are available, via the formula: (MoonSize/1000)^2. However this was removed some years ago, now the amount of fields is theoretically limitless, however there are practical upper bounds due to cost and time constraints.