Saegon Planetary Classification Index

The Saegon Planetary Classification Index is what the Saegon Empire uses to determine a planets class, and overall its systems importance to the Empire.
== Terrascore ==
Like most spacefaring civilizations, the Saegon use the Terrascore system to rate a planet's survivability.
*Please Note: Though the words "Planet" & "World" are used exclusively here, a moon under the same conditions will receive the same rating.
Terrascore 0: From what scientists can tell, T0 worlds make up the majority of all galaxies. T0 worlds are defined solely by their lack of life, but their hazardous conditions are often what come to mind first. Most host deadly winds that can bring temperatures down as low as 400 degrees Palban, while others may hold surfaces made of pure magma. Terrascore 0 worlds are heavily colonized by several powers, but require biospheres or underground shelters for protection from both surface and aerial threats (meteorites often pummel T0 worlds).
Terrascore 1: A rating of T1 means life can exist somewhere on the planet without outside assistance or artificial air. While this normally means plant and animal life can wander the surface, some examples such as Axalon where life can only exist underground still fall under this category. While breathable for most, some species may find the air still too thin for comfort and require a respirator.
The first type to support an ecosystem, T1s have the most unstable ecology of any world. Should something happen (extinction of species, extended drought, large-scale fire, etc), it could prove catastrophic for the planet. Unaided, such an occurrence could lead to a mass extinction event and set the planet back to a T0.
Terrascore 2: At level 2, the air is "heavier", allowing larger sentients and sapients to flourish. T2 worlds are far more stable than their predecessors and can fair better in the chance of ecological failure. More plant and animal life than previously possible define Terrascore 2, and can support more significant industrial and agricultural capability for local settlements.
Terrascore 3: The height of a planet's potential, Terrascore 3 is assigned to worlds with healthy ecosystems resistant to jeopardy and can usually fair for themselves without the aid of outside forces. The bulk of prosperous city worlds and faction capitals are found in this Terrascore, as are the largest nature reserves and farms. It's almost a guarantee that if you find yourself in a T3 world, you'll also find society.