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 J - Gas Giant


Age: 2-10 billion years

Diameter: 50,000 - 140,000 km

Location: Cold Zone

Surface: Tenuous, comprised of gaseous hydrogen and hydrogen compounds; radiates some heat

Atmosphere: Zones vary in temperature, pressure and composition

Life-Forms: Hydrocarbon-based (Jovian)

Examples: Jupiter, Saturn

Like their Class I cousins, Class J Planets are lifeless gas giants most often found in a star's outer or cold zone. Larger than virtually all but Class I planets, they range in size from 50 thousand to 140 thousand kilometers in diameter. Although they have a high core temperature, they do not radiate much heat.

High gravity combined with low stellar radiation allows for a tenuous surface comprised of gaseous hydrogen. Some have rocky cores beneath huge lakes of liquid hydrogen, which others possess layers of boiling water near the core. Atmospheres are extreme, containing hydrogen/methane clouds, swirling in storms that can rage at thousands of KPH.

Class J planets are only suitable for Hydrocarbon-based (Jovian) life forms. Jupiter and Saturn in Earth's star system are Class J planets.



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