Editing Planet

[[File: Imperial-Sunburst-Sun-Scouts-wiki.png|right|125px]]
A '''[[World]]''' or [[Planet]] is an astronomical body located in the [[void]], usually orbiting a [[star]].
* The [[IISS]] also uses these astrographic terms near interchangeably.

=== Library Data Referral Tree ===
Please refer to the following [[AAB]] [[Library Data]] for more information: <br>
* [[Charted Space]] Observation 
** [[Astrography]]
** [[Planetology]]
*** [[Habitable Zone]]
*** [[Main World]]
*** [[Moon]]
*** [[Planet]]
*** [[Planetoid]] 
*** [[Ring]]
*** [[Satellite]]
*** [[Star System]] ([[Star]])
*** [[World]]
*** [[World-System]]
** [[Universal World Profile]] ([[UWP]])
*** [[Starport]]
*** [[Planetary Size]]
*** [[Atmosphere]]
*** [[Hydrosphere]]
*** [[Population]]
*** [[Government]]
*** [[Law level]]
*** [[Tech level]]
 
== Description ([[Specifications]]) ==
The term [[world]] refers to the various bodies that are contained in a [[stellar system]]; it encompasses [[planet]]s, [[satellite]]s, and [[asteroid belt]]s. For example, the [[Mainworld|single most important world in a system]] may not be a [[planet]]; it could be a [[satellite]] of a [[gas giant]], or it could be a [[planetoid]] within an [[asteroid belt]]. {{Page cite|name=Worlds and Adventures|version=Classic Traveller|page=6}}

Planets possess a vast variety of identifying characteristics and can be categorized in many different ways. Some of the most common ways include: size, composition, exotic, and special natures.

=== Basic Planetary Types (Composition) ===
* [[Borean World]] (Ice Ball)
* [[Jovian World]] (Gas Ball)
* [[Terrestrial World]] (Rock or Metal Ball)

{| class= "wikitable sortable"
|+ Planetary Characteristics (Composition)
|-
! Type
! Nickname
! Composition
! Remarks
|-
| [[Terrestrial World]]: Silicate world
| Ice Ball
| Icy or rocky world. Ice or light silicate rock.
| Density of 1.3 to 3.0 gm/cc^3, [[Borean World]].
|-
| [[Terrestrial World]]: Low Iron world
| Rock Ball
| Rocky world. Heavy silicate rock, light metals.
| Density of 3.1 to 4.5 gm/cc^3
|-
| [[Terrestrial World]]: Medium Iron world
| Rock Ball
| Rocky world. Moderate mixing of iron and denser metals with silicate rock and lighter metals.
| Density of 4.6 to 6.0 gm/cc^3. [[Terra]] is a Medium Iron world.
|-
| [[Terrestrial World]]: High Iron world
| Metal Ball 
| Metal world. Mostly iron and denser metals with a few silicate rocks.
| Density of 6.1 to 7.0 gm/cc^3
|- 
| [[Terrestrial World]]: Metallic world
| Metal Ball
| Metal world. Entirely iron and other dense metals. 
| Density over 7.1 gm/cc^3
|-
| [[Jovian World]]
| Gas Ball
| Mostly gases & some solids.
| Typically [[Gas Giant]]s. Technically means ''huge world''. [[Satellite]]s of gas giants are known to have [[moon]]s that can be habitable to [[conventional life]]. [[Jupiter (world)|Jupiter]] is a gas giant.
|}

=== Basic Planetary Types (Size) ===
* [[Tiny World]] 
* [[Small World]] 
* [[Meso World]] 
* [[Macro World]]
* [[Big World]]
* [[Gas Giant]]

{| class= "wikitable sortable"
|+ Planetary Characteristics (Size)
|-
! Type
! Code
! Size
! Atm
! Hyd
! Pop
! Gov
! Law
! Remarks
|-
| [[Tiny World]]
| None
| 0RD
| --
| --
| --
| --
| --
| ([[Dwarf World]], [[Planetesimal]], [[Planetoid]], etc.)
|-
| [[Small World]]
| None
| S12
| --
| --
| --
| --
| --
| ([[Planetoid]], [[Protoplanet]], etc.)
|-
| [[Meso World]]
| None
| 345
| --
| --
| --
| --
| --
| ([[Mesoplanet]])
|-
| [[Macro World]]
| None
| 678
| --
| --
| --
| --
| --
| Roughly [[Earth]]-sized.
|-
| [[Big World]]
| None
| 9AB+
| --
| --
| --
| --
| --
| A Super-Earth...
|-
| [[Gas Giant]]
| SGG 
| SGG 
| --
| --
| --
| --
| --
| Small (SGG) gas giant.
|-
| [[Gas Giant]]
| LGG
| LGG
| --
| --
| --
| --
| --
| Large (LGG) gas giant.
|-
|}
* Please see [[AAB]] article [[Planetary Size]] for more information.

=== Exotic Planetary Types ===
These are [[Strange World]]s:
# [[Double World]] ([[Double Planet]])
# [[Rosette World]]
# [[Doughnut World]] ([[Toroid World]])
# [[Ellipsoid World]] 
# [[Mobile World]]
# [[Ring Moon]]
# [[Ring World]]
# [[Rogue World]] 
# [[Sphere World]]
# [[Tent World]]

{| class="wikitable sortable"
|+ TC Exotic World Series (Rarity) ([[IISS]] Scout Handbook, pgs. 490-491)
|-
! [[Planet|Type]]
! [[Trade Classification|Code]]
! [[Planetary Size|Size]]
! [[Atmosphere|Atm]]
! [[Hydrosphere|Hyd]]
! [[Population|Pop]]
! [[Government|Gov]]
! [[Law Level|Law]]
! Remarks
|-
| [[Double World]]
| None
| --
| --
| --
| --
| --
| --
| Double-planet mainworld.
|-
| [[Doughnut World]]
| None
| --
| --
| --
| --
| --
| --
| Toroidal world. A world with a hole in the center...
|-
| [[Ellipsoid World]]
| None
| --
| --
| --
| --
| --
| --
| Egg-shaped world.
|-
| [[Mobile World]]
| None
| --
| --
| --
| --
| --
| --
| Mobile world, whether natural or artificial, with added engines. [[Planetoid]] [[starship]]s exist at TL-15.
|-
| [[Ring World]]
| None
| --
| --
| --
| --
| --
| --
| Artificial ring world. [[Megastructure]].
|-
| [[Rogue World]]
| None
| --
| --
| --
| --
| --
| --
| Extrasystemic world. Thought to be very rare.
|-
| [[Sphere World]]
| None
| --
| --
| --
| --
| --
| --
| Artificial planetoid.
|-
| [[Tent World]]
| 0-2
| --
| --
| --
| --
| --
| --
| A tented & paraterraformed world. Artificially constructed using [[Paraterraforming]].
|-
|}

=== Special Planetary Types ===
# [[Locked World]]
# [[Main World]]
# [[Satellite World]]
# [[Twilight Zone World]]

{| class="wikitable sortable"
|+ TC Exotic World Series (Rarity) ([[IISS]] Scout Handbook, pgs. 490-491)
|-
! [[Planet|Type]]
! [[Trade Classification|Code]]
! [[Planetary Size|Size]]
! [[Atmosphere|Atm]]
! [[Hydrosphere|Hyd]]
! [[Population|Pop]]
! [[Government|Gov]]
! [[Law Level|Law]]
! Remarks
|-
| [[Locked World]]
| Lk
| --
| --
| --
| --
| --
| --
| Locked close satellite. Gravitational relationship.
|-
| [[Main World]]
| Mw
| --
| --
| --
| --
| --
| --
| Socioeconomic center of a [[system]].
|-
| [[Satellite World]]
| Sa
| --
| --
| --
| --
| --
| --
| [[Satellite]] or [[moon]]. Gravitational relationship.
|-
| [[Twilight Zone World]]
| Tz
| --
| --
| --
| --
| --
| --
| Twilight Zone. Orbit 0-1. Gravitational relationship.
|-
|}

== History & Background ([[Dossier]]) ==
Scientist argue about a variety of celestial objects and are constantly defining and redefining what is and isn't a planet:
* Planetary-Mass Object (PMO) 
* Planemo 
* Planetary body
* Dwarf planet 
* Protoplanet
* Small Solar System Body (SSSB) [Minor planet]

The [[Solomani]] are particularly contentious in this area and the IAU (International Astronomical Union) definition of planet has fluctuated many times over the millennia.

=== Physical Planetology ===
This planetary grouping organizes by physical characteristics:
# [[Asteroid Belt World]] 
# [[Big World]]
# [[Cold World]]
# [[Desert World]]
# [[Fluid World]]
# [[Frozen World]]
# [[Garden World]] AKA [[Terran Prime World]]
# [[Hell World]]
# [[Hospitable World]] 
# [[Hot World]]
# [[Ice World]]
# [[Inferno World]]
# [[Inner World]]
# [[Inhospitable World]]
# [[Locked World]]
# [[Meso World]]
# [[Ocean World]] 
# [[Outer World]]
# [[Panthallasic World]] 
# [[Planetoid Belt World]]
# [[Rad World]]
# [[Small World]] 
# [[Storm World]]
# [[Temperate World]]
# [[Tiny World]] 
# [[Tropical World]]
# [[Tundra World]]
# [[Twilight Zone World]]
# [[Vacuum World]]
# [[Water World]]
# [[Worldlet]]

=== Socioeconomic Planetology ===
This planetary grouping organizes by socioeconomic characteristics:
# [[Agricultural World]] Series (Foodstuffs)
## [[Agricultural World]]
## [[Farming World]]
## [[Nonagricultural World]]
## [[Preagricultural World]]
# Colony World Series (Subjugation)
## [[Colonizer World]]
## [[Colony World]]
## [[Military Rule World]]
## [[Penal Colony World]]
## [[Prison World]]
# [[Industrial World]] Series (Manufacturing)
## [[Industrial World]]
## [[Mining World]]
## [[Nonindustrial World]]
## [[Preindustrial World]]
# Population World Series (Sophonts)
## [[Average Population World]]
## [[Lo Population World]]
## [[Hi Population World]]
## [[Pre-high Population World]]
# Socioeconomic World Series (Wealth)
## [[Main World]]
## [[Golden World]]
## [[Nexus World]]
## [[Poor World]]
## [[Pre-rich World]]
## [[Rich World]]
## [[Satellite World]]
## [[Silver World]]
# Technology World Series (Tech)
## [[Low Tech World]]
## Average Tech World
## [[High Tech World]]

=== Biological Planetology ===
This planetary grouping organizes by bioplanetological ([[life]]-bearing) characteristics:
# [[Barren World]]
# [[Die Back World]]
# [[Garden World]]
# [[Home World]]
# [[Hospitable World]]
# [[Inhospitable World]]
# [[Reserve World]]

==== Bioplanetological Sciences ====
{| class="wikitable sortable"
|+ Bioplanetological Sciences
|-
! Science
! Actor <br> [[Scientist]]
! Remarks
|-
| [[Xenobiology]]
| [[Exobiologist]]
| The study of [[creature]]s, pre-[[sophont]]s, or lower intelligent [[lifeform]]s. 
* In a greater sense applies to all [[life]], but is usually applied this way.
|-
| [[Sophontology]]
| [[Sophontologist]]
| The study of [[sophont]]s or intelligent [[lifeform]]s. Includes [[Proto-sophont]]s
|-
| [[Terraforming]]
| [[Terraformer]]
| A ''[[Planetary Engineering|planetary engineering]]'' process which, over many years, converts a hostile world ([[Inhospitable World]]) into a livable one ([[Hospitable World]]).
|-
|}

=== Planet vs. World ===
What are the technical differences between the terms planet and world? In common usage, they are used interchangeably, but how do [[IISS]] scouts use the terms?
{| class="wikitable sortable"
|+ Planet vs. World
|-
! Term
! Remarks
|-
| [[Planet]]
| Denotes an astronomic and astrographic meaning and applies to all of the bodies in a [[system]].  
|-
| [[World]]
| Denotes a socioeconomic and sophontilogical meaning and mostly applies to those bodies with [[sophont]] populations, usually [[main world]]s or [[satellite world]]s. 
|-
|}

== References & Contributors ([[Sources]]) ==
{{Advanced}}
{{Sources
|S1= {{Ludography cite|name= Worlds and Adventures |version=Classic Traveller||page= —}}
|S2= {{Ludography cite|name= Scouts |page= —}} 
|S4= {{Ludography cite|name= A Guide to Star Systems |page= —}} 
|S3= {{Ludography cite|name= T5 Core Rules |page= —}} 
|S5= [http://www.mega-traveller.com/beowulf/ Beowolf's Libary Data Website] {{dead link}}
|S7= Author & Contributor: Lord (Marquis) and Master of Sophontology [[Maksim-Smelchak]] of the [[Ministry of Science]] 
}}
 

{{LE|Astrography|Astronomy|Planets}}
{{LEN|}}