In the Federation standard system of planetary classification, a class D planet was characterized as a small, rock-based body, such as an asteroid, moon or other barren, cratered planetoid with little or no atmosphere.
The planetoid known as Weytahn to the Andorians and Paan Mokar to Vulcans was an example of a class D world, though the Andorians terraformed it to have a breathable atmosphere. It was described as being not much larger than Earth's moon, Luna. (ENT: "Cease Fire")
Regula, which in 2285 was described as a "great rock in space" with a few "unremarkable ores," was also a class D planet. (Star Trek II: The Wrath of Khan)
In 2371, the USS Voyager found a ringed planet in the Delta Quadrant which was also class D. Some of the asteroids comprising the rings were big enough to have class M environments inside them. (VOY: "Emanations")
A subspace sinkhole encountered by the Voyager in 2375 led to a subspace pocket, where a star system composed of a G-type star and three planets was located. One of these planets was class D. It was described as hot, arid, and rocky, but otherwise had an atmosphere breathable by humanoids, e.g., Humans and Vulcans. It also supported limited indigenous plants and a species of spiders. (VOY: "Gravity")
List of class D worlds[]
Image | Name | Location | Notes | Source |
---|---|---|---|---|
Kerkhovian moon | In orbit of Kerkhov, Vulcan system, Alpha Quadrant | Place of origin for the Kerkhovians | SNW: "Charades" | |
Regula | Mutara sector, near the Mutara Nebula | Star Trek II: The Wrath of Khan | ||
T'Khut moon | In orbit of T'Khut, Vulcan system, Alpha Quadrant | SNW: "Charades" | ||
Unnamed subspace sinkhole planet | Orbiting a G-type star, inside a subspace sinkhole in the Delta Quadrant | Unusually hospitable for a class D world; destroyed when the sinkhole was collapsed by Yost in 2375 | VOY: "Gravity" | |
Unnamed planet in the Delta Quadrant | Delta Quadrant | Asteroids in the ring system connected to Vhnori homeworld by subspace vacuoles | VOY: "Emanations" | |
Weytahn/Paan Mokar | Andorian-Vulcan border, Alpha Quadrant | Terraformed by the Andorian Empire in the 2050s | ENT: "Cease Fire" |
Planetary classification |
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B • D • G • H • J • K • L • M • N • R • T • Y • Other classes |
External link[]
- Class D planet at Memory Beta, the wiki for licensed Star Trek works