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       #Post#: 216--------------------------------------------------
       Planet Classifications
       By: Chrymerion Imperius Date: September 11, 2015, 3:09 pm
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       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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