Planet Classification

Planetary Classification has been setup by The Galactic Union since 2460. Setup by a joint team of Vajeen and Human scientists, this system categorises all known celestial objects by their Hazard Level (the Schoeman-Riggs Scale), civilisations by their technology level (Arqqa-Kobayashi Method). The Terran Spacefaring Guild also has a terrestrial planet categorisation system based on mass, humidity, mineral composition and biome that, although developed independently, is also used by Galactic Union scientists to categorise planets in The Milky Way, Ikelos and Andromeda galaxies.

Hazard Level
The Schoeman-Riggs Scale is a 0-6 scale defining the precautions that should be made when landing on certain "Hostile Worlds".

Technology Scale
Named after the scientists Arqqa Vtsor and Takeo Kobayashi, this scale shows the gradual advancement of a society from a stone age tribe to a globe-spanning empire.

Biosphere Types
Biosphere Types are classified based off various boring scientific values that can be inferred by the following tables:

Humid Worlds
Humid Worlds are have a tropical equator and temperate hemispheres. Humid Worlds are the most common type of habitable exoplanets. As a plus, all forms of Humid Worlds have the potential to have multicellular life on them.

Arid Worlds
Arid Worlds are known for their hotter than average temperature ranges.

Arctic Worlds
Arctic Worlds are known for their colder than average temperature ranges. A Type V Arctic world would most likely be indistinguishable from a Continental world with a somewhat lower-than-average mean surface temperature.

Hostile Worlds
Hostile Worlds are all bereft of naturally-evolved life. Class V Hostile Worlds vary depending on their target biosphere, taking the Type I portion of the biosphere transitional range (seeing it as a theoretical terraforming gradient).