Difference between revisions of "Planetary and Stellar classes"
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== List of known classes == | == List of known classes == | ||
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|+ Star Trek Planetary Classes | |+ Star Trek Planetary Classes | ||
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+ | !Class!!Name of Class!!Surface!!Atmosphere!!Description!!Life Forms!!Example | ||
+ | |- | ||
+ | |A||Geothermal||Partially molten, very hot||Much volcanic activity, small, barren||Carbon Dioxide/Hydrogen||None||Gothos | ||
+ | |- bgcolor="#303030" | ||
+ | |B||Geomorteus||Partially motlen||Helium, soduim, thin||Molten, unstable surface||None||Mercury, Nebhilum | ||
+ | |- bgcolor="#202020" | ||
+ | |C||Geoinactive||Barren||None||No geological activity, cold barren surface||None||Psi 2000 | ||
+ | |- bgcolor="#303030" | ||
+ | |D||Dwarf||Barren, cratered||Thin or none||composed of ice, barren, cold||None||Pluto, Ceres, Eredas-Il | ||
+ | |- bgcolor="#202020" | ||
+ | |E||Geoplastic||Molten, High Temperatures||Hydrogen compounds||Earliest stages of habitable world, geologically active, hot||None||Excalibia | ||
+ | |- bgcolor="#303030" | ||
+ | |F||Geometallic||Volcanic, barren||Carbon dioxide, ammonia, methane||Early forms of life, water condensation, barren surface||Bacteria||Janus IV | ||
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+ | |G||Geocrystalline||Rocky, mostly barren||Carbon dioxide, oxygen, nitrogen||Early form of life-sustaining worlds||Vegetation, simple organisms||Delta Vega | ||
+ | |- bgcolor="#303030" | ||
+ | |H||Desert||Little water||Oxygen, nitrogen, argon, metals||Little rain, less than 20% surface water||Drought-resistant plants and animals, possibly humanoids||Ocampa, Nimbus III | ||
+ | |- bgcolor="#202020" | ||
+ | |I||Ice Giant||Rock, ice, methane, ammonia||Hydrogen, helium||Planet core is mostly ice, outer fringe of system||None||Uranus, Neptune | ||
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+ | |J||Gas Giant||Liquid metallic hydrogen||Hydrogen, helium||Maximum wind speeds of 600kph (373mph), liquid and gaseous hydrogen||None||Jupiter, Saturn | ||
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+ | |K||Adaptable||Barren, little surface water||Thin, mostly carbon dioxide||Suitable for colonization through pressure domes||None||Mars, Mudd | ||
+ | |- bgcolor="#303030" | ||
+ | |L||Marginal||Rocky, little surface water||Argon, oxygen, trace elements||Rocky, forested worlds, suitable for terraforming||Plants, no animals||Alarin III, Ciden II, Indri VII | ||
+ | |- bgcolor="#202020" | ||
+ | |M||Terrestrial||Between 20-80% surface water, fertile land||Nitrogen, oxygen, argon||silicate rocks, suitable for humanoid life, fertile land||Plants, animals, humanoids||Earth, [[Vulcan]], Cardassia | ||
+ | |- bgcolor="#303030" | ||
+ | |N||Reducing||Barren, high temperatures||carbon dioxide and sulfides||High air temperature, density and pressure, up to 500C (932F)||None||Venus | ||
+ | |- bgcolor="#202020" | ||
+ | |O||Pelagic||More than 80% water, archipelagos||Nitrogen, oxygen, argon||Very warm atmospheres and abundant surface water, tropical||Tropical plants, cetacean life, rarely humanoid||Delta IV, [[Bolarus IX]], Azati Prime | ||
+ | |- bgcolor="#303030" | ||
+ | |P||Glaciated||More than 80% water, frozen||Nitrogen, oxygen||Frozen worlds, very cold, rarely above freezing||Hardy plants, animal life, humanoid||Andoria, Exo III, Rura Penthe | ||
+ | |- bgcolor="#202020" | ||
+ | |Q||Variable||Molten, frozen, jungle, etc||tenuous to dense||Deserts and rainforests exist within a few kilometers, glaciers near the equator||None||Genesis Planet | ||
+ | |- bgcolor="#303030" | ||
+ | |R||Rogue||Temperate||Primarily volcanic outgassing||Forms in a star system, but is expelled. Can maintain habitable areas if geologically active||Non-photosynthetic plants, animals||Dakala, Beneihm, [[memoryalpha:Founders|Founder]]s' Homeworld (prior to 2373) | ||
+ | |- bgcolor="#202020" | ||
+ | |S||Gas Supergiant||Liquid metallic hygrogen||Hydrogen, helium||Similar to Class J Gas Giants with liquid hygrodren cores surrounded by hydrogen and helium atmosphere||None||Tethe-Alla IV | ||
+ | |- bgcolor="#303030" | ||
+ | |T||Gas Ultragiant||Liquid hydrogen, deuterium||Hydrogen, helium||Category of largest size of planets. Similar to class J and S. If sufficiently massive can possibly ignite into a red dwarf star, causing a binary system||None||Tethe-Alla V, Diadem | ||
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+ | |X||Chthonian||Barren, extremely hot||None||Failed Class T, stripped of helium/hydrogen atmosphere. Dense, Metal-Rich core||None||Osirus | ||
+ | |- bgcolor="#303030" | ||
+ | |Y||Demon||Barren, extremely hot||Turbulent||Toxic radiation, extreme temperatures, atmospheric storms with winds up to 500kph (311mph)||Mimetic||Planet Hell (Delta Quadrant) | ||
|} | |} | ||
− | + | <br><br><br><br> | |
+ | Formerly Used Categories | ||
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Revision as of 02:03, 16 December 2012
The following information is gathered from various sources, including NASA documents, The original FASA Star Trek RPG, Memory Alpha (where it does not flagrantly disagree with otherwise established classes), and various other sources.
Contents
List of known classes
Class | Name of Class | Surface | Atmosphere | Description | Life Forms | Example |
---|---|---|---|---|---|---|
A | Geothermal | Partially molten, very hot | Much volcanic activity, small, barren | Carbon Dioxide/Hydrogen | None | Gothos |
B | Geomorteus | Partially motlen | Helium, soduim, thin | Molten, unstable surface | None | Mercury, Nebhilum |
C | Geoinactive | Barren | None | No geological activity, cold barren surface | None | Psi 2000 |
D | Dwarf | Barren, cratered | Thin or none | composed of ice, barren, cold | None | Pluto, Ceres, Eredas-Il |
E | Geoplastic | Molten, High Temperatures | Hydrogen compounds | Earliest stages of habitable world, geologically active, hot | None | Excalibia |
F | Geometallic | Volcanic, barren | Carbon dioxide, ammonia, methane | Early forms of life, water condensation, barren surface | Bacteria | Janus IV |
G | Geocrystalline | Rocky, mostly barren | Carbon dioxide, oxygen, nitrogen | Early form of life-sustaining worlds | Vegetation, simple organisms | Delta Vega |
H | Desert | Little water | Oxygen, nitrogen, argon, metals | Little rain, less than 20% surface water | Drought-resistant plants and animals, possibly humanoids | Ocampa, Nimbus III |
I | Ice Giant | Rock, ice, methane, ammonia | Hydrogen, helium | Planet core is mostly ice, outer fringe of system | None | Uranus, Neptune |
J | Gas Giant | Liquid metallic hydrogen | Hydrogen, helium | Maximum wind speeds of 600kph (373mph), liquid and gaseous hydrogen | None | Jupiter, Saturn |
K | Adaptable | Barren, little surface water | Thin, mostly carbon dioxide | Suitable for colonization through pressure domes | None | Mars, Mudd |
L | Marginal | Rocky, little surface water | Argon, oxygen, trace elements | Rocky, forested worlds, suitable for terraforming | Plants, no animals | Alarin III, Ciden II, Indri VII |
M | Terrestrial | Between 20-80% surface water, fertile land | Nitrogen, oxygen, argon | silicate rocks, suitable for humanoid life, fertile land | Plants, animals, humanoids | Earth, Vulcan, Cardassia |
N | Reducing | Barren, high temperatures | carbon dioxide and sulfides | High air temperature, density and pressure, up to 500C (932F) | None | Venus |
O | Pelagic | More than 80% water, archipelagos | Nitrogen, oxygen, argon | Very warm atmospheres and abundant surface water, tropical | Tropical plants, cetacean life, rarely humanoid | Delta IV, Bolarus IX, Azati Prime |
P | Glaciated | More than 80% water, frozen | Nitrogen, oxygen | Frozen worlds, very cold, rarely above freezing | Hardy plants, animal life, humanoid | Andoria, Exo III, Rura Penthe |
Q | Variable | Molten, frozen, jungle, etc | tenuous to dense | Deserts and rainforests exist within a few kilometers, glaciers near the equator | None | Genesis Planet |
R | Rogue | Temperate | Primarily volcanic outgassing | Forms in a star system, but is expelled. Can maintain habitable areas if geologically active | Non-photosynthetic plants, animals | Dakala, Beneihm, Founders' Homeworld (prior to 2373) |
S | Gas Supergiant | Liquid metallic hygrogen | Hydrogen, helium | Similar to Class J Gas Giants with liquid hygrodren cores surrounded by hydrogen and helium atmosphere | None | Tethe-Alla IV |
T | Gas Ultragiant | Liquid hydrogen, deuterium | Hydrogen, helium | Category of largest size of planets. Similar to class J and S. If sufficiently massive can possibly ignite into a red dwarf star, causing a binary system | None | Tethe-Alla V, Diadem |
X | Chthonian | Barren, extremely hot | None | Failed Class T, stripped of helium/hydrogen atmosphere. Dense, Metal-Rich core | None | Osirus |
Y | Demon | Barren, extremely hot | Turbulent | Toxic radiation, extreme temperatures, atmospheric storms with winds up to 500kph (311mph) | Mimetic | Planet Hell (Delta Quadrant) |
Formerly Used Categories
Class | Surface | Atmosphere | Description | Example |
---|---|---|---|---|
A | tenuous, may not be present | reducing; methane, etc. | radiates heat, "failed" star | Jupiter, Saturn |
B | tenuous, may not be present | reducing | non-radiant | Neptune |
C | iron/silicate | reducing/dense | high surface temperature | Venus |
D | nickel-iron/silicate | (A-G)none, (H-N)tenuous | asteroids | Ceres |
E | silicate, some metals | reducing/oxidizing | large molten core | Janus IV |
F | silicate, some metals | oxidizing | very young | Delta Vega |
G | silicate | oxidizing, thin | desert planet | Rigel XII |
H | silicate | variable | geologically active | Gothos |
I | metallic/silicate | fluid, very dense | small/young | Excalibis |
J | silicate | very tenuous, noble gasses | moons | Luna |
K | silicate | tenuous, some water | adaptable with pressure domes | Mars |
L | silicate/water | oxidizing | geologically inactive | Psi 2000 |
M | silicate/water | oxidizing | geologically active | Terra |
N | water entirely | oxidizing | pelagic planet | Argo |
P | water/silicate | oxidizing | glacial planet | Breen |
R | water/silicate | negligible | Rogue | Dakala |
S | small dense metallic | reducing | small ultra gas giant | Braxis |
T | small dense nickel-iron | reducing | large ultra gas giant | Luava |
Y | metallic/silicate | reducing | demon class | Silver Blood planet |
Stellar Classes
In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are most prominent in the light, giving an objective measure of the temperature in this chromosphere. Unlike what is the case for planets, stellar bodies are often classed on two scales - size and temperature/color.
Stars based on color and temperature
The following table does include a rough gauge of mass, but this has little to do with the size. Also appended to this is an arabic numeral (0-9), where 0 is among the hottest stars in a class, and 9 is among the coolest.
Class | Surface Temperature | Color | Mass (Solar Masses) | Fraction of All Main Sequence Stars |
---|---|---|---|---|
O | ≥ 33,000 K | Blue | ≥ 16 M | ~0.00003% |
B | 10,000–33,000 K | Blue/Blue-White | 2.1 - 16 M | 0.13% |
A | 7,500–10,000 K | White | 1.4 - 2.1 M | 0.6% |
F | 6,000–7,500 K | Yellowish White | 1.04 - 1.4 M | 3% |
G | 5,200–6,000 K | Yellow | 0.8 - 1.04 M | 7.6% |
K | 3,700–5,200 K | Orange | 0.45–0.8 M | 12.1% |
M | ≤ 3,700 K | Red | ≤ 0.5 M | 76.45% |
The following are called "extended classes", which I think will help us when writing as well.
Class | Surface Temperature | Color | Mass (Solar Masses) |
---|---|---|---|
L | ≤ 2,000 | Red/Brown | ≤ 0.08 M |
T | ≤ 1,200 | Brown Dwarf | ≤ 0.08 M |
Y | < 600 K | Brown Dwarf | ≤ 0.01 M |
Other types of stars do exist, and they may be added here at a later date.
Stars based on size
This scale is based on the radius and luminosity effects of a star. They are generally referred to as "luminosity classes"
Class | Description |
---|---|
0 | Hypergiants |
I | Supergiants |
II | Bright Giants |
III | Normal Giants |
IV | Subgiants |
V | Main Sequence Stars |
VI | Subdwarfs |
VII | White Dwarfs (Very Rare) |
To put things in perspective: Sol is defined as a G2V star. This means it falls into Spectral type G (yellow), is within the hottest 30% of G-type stars (2), and is within the main sequence. To compare, 40 Eridani A (Vulcan's primary sun) is a K1V.