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Class Y planet
| PLANETARY CLASSIFICATION | |
| Class Y | |
| Classification: | Demon |
| Age: | 2-10 billion years |
| Diameter: | 10,000-15,000 km |
| Location: | Hot Zone/Ecosphere/Cold Zone |
| Surface: | Temperatures exceding 500°K |
| Atmosphere: | Saturated with toxic chemicals and thermionic radiation |
A Class Y planet is a planet that has a turbulent atmosphere, saturated with toxic chemicals and thermionic radiation. (ST reference: Star Charts)
A malfunction on Vanguard in 2265 resulted in the environmental computers creating a Class Y environment in several sections populated by humans. (SCE eBook: Distant Early Warning)
The Bajoran moon Jeraddo became a Class Y "Demon" planet after the tapping of its molten core released toxic gases into the atmosphere. (DS9 - Millennium novel: The Fall of Terok Nor)
A Class Y planet in the Delta Quadrant was inhabited by a mimetic species. (VOY episode: "Demon")
Planets of this Type
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