Editing Encyclopedia Galactica:Main Page (section)

==Structure==

Entries in the Encyclopedia fall into four broad categories:

===Solar Systems===

Solar Systems are entries that describe an entire collection of planets that revolve around a central body (or bodies), known as the system's ''primary''.  Solar system entries should contain information about the type, age, and mass of the primary, a list of the major planets in the solar system, and any other features and global environmental concerns obvious to a casual observer (i.e. the solar system is on the edge of a large nebula that dominates the sky of any planet.)

===Planets & Planetoids===

Planetary entries describe a single member of a solar system.  Entries should include such basic data as the mass, radius, mean distance from the primary, plus the existence and composition of any atmosphere or hydrosphere (oceans) that may be present.  Detailed chemical compositions aren't necessary, but could be included.

===Lifeforms===

Lifeform entries describe either sentient or non-sentient inhabitants of a planet.  Contributors should not feel constrained in creating animals, but should consider creating entries for plants, microscopic life and other interesting critters.  Entries should include comparative data, such as average height and mass, lifespan, preferred climate and other ecological data, such as known sources of food and known predators.

===Societies===

Societal entries describe the cultural, political and sociological aspects of sentient lifeforms.  Only one page per sentient should be created, with any and all aspects of the society confined to that page.  Entries need not be immediately exhaustive - if a contributor only has an idea for an alien religion, create a page with only that information on it.  Be sure to at least include "hooks" that other contributors can use to flesh out the rest of the society.