Author Topic: Planet Classifications  (Read 95 times)

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Offline Chrymerion Imperius

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Planet Classifications
« on: September 11, 2015, 04:09:15 pm »
Class A, B and C
Typically small, young planets whose class depends on their age and solidity of their cores.

Class D
Are Planetoids like asteroids and some moons.

Class E, F and G
Typically, Proto-Earth-sized planets whose class depends on their age and solidity of their cores.

Class H
These planets appear as harsh desert worlds.

Class I
The smallest class of gas giant, smaller than Class J. Often these are "ice giants" similar to Uranus and Neptune.

Class J and T
The planets are gas giants. Class J are smaller than Class T which are considered "super", or "ultra", gas giants.

Class K
The planets are barren worlds with no native life. They do not possess breathable atmospheres, but have reasonably tolerable gravity, thus they can be colonized with atmospheric domes. However, through terraforming, they can be made into Class M worlds.

Class L
These planets are barely habitable worlds with primitive ecosystems.

Class M
Their atmospheres are composed of nitrogen and oxygen and have an abundance of liquid water necessary for carbon-based life to exist. Extensive plant and animal life often flourishes; often, a sentient race is also present.

Class N
These planets have a reducing environment and are barren and rocky with extremely high surface temperatures caused by thick atmospheres containing carbon dioxide and corrosive sulfides. Class N planets are more related to Class M with the key difference being a higher ratio of water to land.

Class O and P
Planets covered almost completely with water (class O), or water–ice (Class P).

Class Q
Planets with continually changing environments caused by peculiar orbits, an orbit around a variable output star, or some other factor which causes conditions to drastically change over time.

Class R
A rogue planetary body, which is one that does not orbit a star but drifts freely in space.[3] However, not all rogue planets are classified as Class R

Class S
Class of gas giant smaller than Class T and the next larger size up from Class J.

Class T
The largest class of gas giant. Smaller gas giants are, in order of decreasing size, Class S, J and I.

Class Y
These planets are referred to as "demon" worlds, where surface conditions do not fall into any other recognized category. Such worlds are usually hostile and lethal to humanoid life. If life develops on these worlds they usually take on many bizarre forms, like living crystal or rock, liquid or gaseous physical states, or incorporeal, dimensional, or energy-based states.

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