Planetary Classifications

Class A - Geothermal

Class B - Geomorteus

Class C - Geoinactive

Class D - Asteriod/Moon

Class E - Geoplastic

Class F - Geometallic

Class G - Geocrystalline

Class H - Desert

Class I - Gas Supergiant

Class J - Gas Giant

Class K - Adaptable

Class L - Marginal

Class M - Terrestrial

Class N - Reducing

Class O - Plegaic

Class P - Glaciated

Class Q - Variable

Class R - Rogue

Class S - Ultragiant

Class T - Ultragiant

Class Y - Demon


Class H - Desert


Age: 4-10 billions years

Diameter: 8,000 - 15,000 km

Location: Hot, Ecosphere, or Cold Zones

Surface: Hot and arid, little or no surface water

Atmosphere: May contain heavy gases and metal vapors

Life-Forms: Drought and radiation-resistant plants, animal life

Examples: Tau Cygna V

Most often found within a star's habitable zone, Class H planets may reside in any zone. Somewhat smaller than Earth, they range in size from 8,000 to 15,000 kilometers. Class H planets have a molten core and a dry, barren rock surface, with a thin primarily carbon dioxide atmosphere. Oxygen is generally only present in small amounts, along with trace gases such as argon and xenon. Iron rich desert-like plains, dry valleys and canyons, and occasional volcano or mountain range mark the surface. Although conditions are inhospitable, they are capable of supporting simple plant life and insects.

Tau Cygna V, a desert planet bathed in hyperonic radiation, is Class H. A Federation colony was established there in violation of the Treaty of Arms in "The Ensigns of Command" (TNG).



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