Early Voyages
Planet, Class-M
Earth (ENT-78)
Vulcan (TOS-34)
Terrestrial. Age ranged from 3-10 billion years. Diameter was 10,000 to 15,000 km. Typically located in the Ecosphere of a planetary system. Surface water was abundant; if water or ice covered more than 80% of the surface, the planet was considered Class O or Class P. Atmosphere was primarily primarily nitrogen, oxygen, and trace elements. Contained extensive vegitation and animal life.[8] Capable of supporting carbon-based, humanoid life.[1]
The designation apparently stemmed from the Vulcan word “Minshara,” which was used to designate planets capable of supporting life.[7] Class-M planets could vary widely in color, cloud cover, and overall appearance. Most Class-M planets were characterized by a relatively thin, tectonically active crust floating on a molten rock mantle, which in turn surrounded a liquid metal outer core and a solid inner core composed of metal crystals.
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Planet, Class-K
Mars (STSC)
Mudd (TOS-41)
Adaptable. Age ranged from 4-10 billion years. Diameter was 5000 to 10,000 km. Typically located in the Ecosphere of a planetary system. Surface was barren, with little or no surface water, atmosphere was thin and mostly carbon dioxide. Adaptable for humanoid colonization through the use of pressure domes and terraforming. May contain primitive single-celled organisms.[1]
Class-K Planets:
References
Planet, Class-J
Jupiter (ENT-50)
Saturn (TNG-101-102)
Gas giant. Age ranges from 2-10 billion years. Diameter is 50,000 to 140,000 km. Typically located in the Cold Zone of a planetary system. Surface radiates some heat and is tenuous and comprised of gaseous hydrogen and hydrogen compounds, atmospheric zones vary in temperature, pressure and composition. May contain hydrocarbon-based life forms.[1]
References
- 1. Star Trek Star Charts. Book. Pocket Books. October 2002.
Planet, Class-D
Class-D Planet (VOY-109)
Moon (STSC)
Asteroid/Moon. Age ranged from 2-10 billion years. Diameter was 100 to 1000 km. Typically located in the Hot Zone, Ecosphere or Cold Zone of a planetary system, primarily in orbit of larger planets or in asteroid belts. Surface was barren and cratered, atmosphere was nonexistent or extremely tenuous. No native life forms.[1]
Class-D Planets:
References
Planet, Class-C
Psi-2000 (TOS-06)
Geoinactive. Age ranged from 2-10 billion years. Diameter was 1000 to 10,000 km. Typically located in the Ecosphere or Cold Zone of a planetary system. Surface was low temperature, atmosphere was frozen. No native life forms.[1]
Class-C Planets:
References
Planet, Class-B
Geomorteus. Age ranged from 0-10 billion years. Diameter was 1000 to 10,000 km. Typically located in the Hot Zone of a planetary system. Surface was partially molten and had a high temperature, atmosphere was extremely tenuous, with few chemically active gases. No native life forms.[1]
Class-B Planets:
References
Quadrants
One quarter of the galaxy. The four quadrants were designated by the Greek letters Alpha, Beta, Gamma, and Delta, and were arbitrarily divided using Earth as a reference point. As a result, Earth, and the sector it occupied, fell in the Alpha Quadrant, while the sector containing Vulcan and Andoria fell in the Beta Quadrant. The Gamma and Delta Quadrants remained largely unexplored through the 25th century, though knowledge of those regions was greatly increased thanks to the Bajoran wormhole and the U.S.S. Voyager NCC-74656, respectively.[1]
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Milky Way Galaxy
Milky Way (TOS-01)
The Milky Way was a spiral galaxy approximately 100 thousand light years across, divided into four quadrants, designated by the Greek letters Alpha, Beta, Gamma, and Delta, and were arbitrarily divided using Earth as a reference point. As a result, Earth, and the Sol Sector, fell in the Alpha Quadrant, while the Vulcan and Andorian Sectors fell in the Beta Quadrant. The Gamma and Delta Quadrants remained largely unexplored by the early 25th century, though knowledge of those regions was greatly increased thanks to the Bajoran wormhole and the U.S.S. Voyager NCC-74656, respectively.[3] The galaxy was surrounded by a nearly-impenetrable energy field, dubbed the Galactic Barrier, with unpredictable neurogenic properties.[1, 3] Likewise, the core of the galaxy is surrounded by a distinct but related field, dubbed the Great Barrier.[2, 3]
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Asteroid
Asteroid (TOS-58)
Small celestial body composed of rock and metal, typically much smaller than a planet, often irregularly shaped. Asteroids often occurred in orbital belts within a star system, sometimes the debris remaining from the formation of that system, other times the fragments remaining from the disintegration of a planet. Larger asteroids were sometimes called planetoids.
In 2267, the U.S.S. Enterprise NCC-1701 attempted to divert an asteroid that was on a collision course with an inhabited planet.[1] A Type-C asteroid crashed into an unpopulated continent of Penthara IV in 2367, threatening an ecological disaster until the U.S.S. Enterprise NCC-170-D helped dispel its dust cloud.[2] Another asteroid from the Pelloris Field threatened Tessen III with the same type of destruction in 2368 before it was vaporized by the same starship. Its nitrium alloy core prevented a tractor beam lock, and it was undamaged when hit by photon torpedoes. It was later discovered to be the home of metal parasites.[3]
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Water Buffalo
The Talosians viewed several images of Earth animal life, including one of a water buffalo, while accessing the U.S.S. Enterprise NCC-1701‘s computer in the 2250s.[1]
References
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