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Memory Beta, non-canon Star Trek Wiki
For other uses, see Class O.

In planetary classification Class O or Pelagic planets are those with surfaces comprising 80% or more water. These planets may have some surface land (up to 19%), but it is not a majority feature. In all other regards, Class O planets are identical to Class M planets. A true example of a Class O planet is Argo, while the planet Earth falls just short of the surface water requirement to be considered Class O. (ST reference: Star Charts)

Class O worlds[]

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Planetary classification
numeric: class 9
("Q'tahL"-class)
alphabetical: class A
class A geothermal
class A gas giant
class B
class B geomorteus
class B gas giant
class C
class C geoinactive
class C reducing
class D class E
class F
class F geometallic
class F geocrystalline
class G
class G geocrystalline
class G desert
class H
class H desert
class H geothermal
class I
class I gas supergiant ("Q'tahL"-class)
class I metallic/silicate
class J
class J gas giant
class J moon
class K
class K silicate/adaptable
class K transjovian
class L class M ("Minshara"-class)
class MZ
class N
class N reducing
class N pelagic
class O class P class Q
class R class S class T class Y
("Demon"-class)

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