Class D planets range in age from 2 to 10 billion years old. Their diameters range in size from 100 to 1,000 km. They are primarily found in orbit of larger bodies or in the asteroid field of the star's solar system. Their surfaces are barren and cratered. The atmosphere within the planet is very tenuous if there is one at all. They are not suitable for life. (Star Trek: Star Charts)
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| - Class D planets range in age from 2 to 10 billion years old. Their diameters range in size from 100 to 1,000 km. They are primarily found in orbit of larger bodies or in the asteroid field of the star's solar system. Their surfaces are barren and cratered. The atmosphere within the planet is very tenuous if there is one at all. They are not suitable for life. (Star Trek: Star Charts)
- In planetary classification, a class D planetoid is a type of planet. Planets of this type are generally smaller asteroids or moons that are locked into the gravitational pull of a larger planetary body. Class D worlds are usually composed of metals, predominantly nickel, iron and silicate. Bodies of this type generally do not support lifeforms. (ST references: Star Charts, The Worlds of the Federation; Last Unicorn RPG module: Star Trek: The Next Generation Core Game Book)
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abstract
| - In planetary classification, a class D planetoid is a type of planet. Planets of this type are generally smaller asteroids or moons that are locked into the gravitational pull of a larger planetary body. Class D worlds are usually composed of metals, predominantly nickel, iron and silicate. Bodies of this type generally do not support lifeforms. (ST references: Star Charts, The Worlds of the Federation; Last Unicorn RPG module: Star Trek: The Next Generation Core Game Book) This classification was listed as class I as described in ST reference: Star Trek Maps, although the same chart was reprinted by Pocket Books in The Worlds of the Federation with the notation corrected.
- Class D planets range in age from 2 to 10 billion years old. Their diameters range in size from 100 to 1,000 km. They are primarily found in orbit of larger bodies or in the asteroid field of the star's solar system. Their surfaces are barren and cratered. The atmosphere within the planet is very tenuous if there is one at all. They are not suitable for life. (Star Trek: Star Charts)
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