Key to the StarGen Icons

These pages were all created by a program, StarGen, that I created using pieces from "starform" and "accrete". Each planet created by StarGen has an icon associated with it. The following table describes these icons and the types of planets that they represent.

StarGen Planet Types
Rock Rock These are planets without atmospheres. They can be hot or cold. The only requirement is a lack of atmosphere. Examples of "rocks" in the solar system are Mercury and Pluto.
Asteroids Asteroids These are small airless bodies. Any planet with a mass les than .1% that of Earth is designated an asteroid. It is assumed that there is a whole belt of such objects.
Venusian Venusian These are planets with a runaway greenhouse effect. The defining characteristics are that they have an atmosphere, water covering less than 5% of their surface and a surface temperature greater than the boiling point of water (and thus actually should have no surface water at all).
Terrestrial Terrestrial These are Earth-like planets with an atmosphere and a hydrosphere, Water covers between 5% and 95% of their surface.
Water Water These planets have an atmosphere and a hydrosphere. The water covers more than 95% of the planet's surface.
Martian Martian These planets have a thin atmosphere and little or no surface water. Less than 5% of the surface is covered with water and less than 95% with ice.
Ice Ice These planets are covered in ice. It covers at least 95% of the surface. These are generally planets that would be terrestrials if they were warmer. Some are so far out they retain Hydrogen, but are so cold their gases freeze. There is no example of this type of planet in the solar system.
Jovian Jovian These are the larger gas giants, represented in the solar system by Jupiter and Saturn. They have masses at least 20 times that of the Earth.
Sub-Jovian Sub-Jovian These are smaller gas giants such as Neptune and Uranus. They have masses less than 20 times that of Earth. The cut-off is arbitrary, and based on the fact that the blue/green Neptune and Uranus look quite different from the striped Juptier and Saturn.
GasDwarf Gas Dwarf These are planets, like the gas giants retain Hydrogen, but are nonetheless mostly rock. Their gas mass is less than 20% of their total mass. They tend to be very far from their sun.
Unknown Unknown This designation is used for planets that are not classifiable as one of the above types.
This category is always temporary, until the program can be made to classify them.