Nebulae

Nebulae are vast, gaseous features of regions that can span across the length of multiple star systems. Nebulae can share coordinates with star systems (though there can be nebulae without stars in them and most stars won't be inside nebulae either) and they bestow a set of unique Attributes to those star systems (or affect their Attributes).

Nebulae Traits
[Designer's Note: or maybe getting into such detail for Nebulas as well is overkill and we should either scrap the Nebulae Density Trait entirely, or have it exist and affect only the Gas Extraction Rate attribute, instead of all Attributes]
 * Nebulae Types (5):
 * Dust Nebula
 * Gas Nebula
 * Ion Nebula
 * Dark Nebula
 * Emission Nebula
 * Nebulae Density (5, ranked):
 * Very Dense (+50% to all Attributes)
 * Dense (+25% to all Attributes)
 * Standard
 * Thin (-25% to all Attributes)
 * Very Thin (-50% to all Attributes)


 * Special Resources (?, list not complete yet) : As in Planets and Stars, special resources can be found in Nebulae as well.

Nebula Attributes
Unique Attributes: Planet Affecting Attributes: Note: All changes in planet attributes are rounded to the nearest integer and changes in weapon efficiency are rounded to the nearest second decimal digit.
 * Beam Weapon efficiency: This unique attribute affects the power of Beam-type weapons in all battles that take place inside the Nebula.
 * Ion/Shock Weapon efficiency: This unique attribute affects the power of Shock-type (ionized) weapons in all battles that take place inside the Nebula.
 * Plasma/Ion Shield efficiency: This unique attribute affects the durability of Plasma and Ion Shields in all battles that take place inside the Nebula.
 * Fleet Stealth multiplier: This unique attribute makes it harder to detect fleets inside a Nebula [exact mechanic still under work]
 * Orbital Solar modifier: This attribute reduces or increases the Orbital Solar Attribute of all planets within a system.
 * Gas modifier: This attribute increases both the Gas Extraction Rate and Gas Deposits of all planets within a system.
 * Metal modifier: This attribute increases both the Metal Extraction Rate and Metal Deposits of all planets within a system.
 * Diamond modifier: This attribute increases both the Diamond Extraction Rate and Diamond Deposits of all planets within a system.

Nebula-only Attributes:
 * Gas Extraction Rate: Like Stars, Gas can be obtained from Nebulae, which also cannot be depleted. However, the Extraction rate is very low, since even the densest Nebulae are actually extremely sparse.
 * Metallicity: Just like Stars, Nebulae have a Metallicity value (a very small %) that indicates the the % of heavier metallic elements within their mass which translates directly to a small amount of Metal being obtained when harvesting Gas from a Nebula.

The following table describes how the 5 Nebula Types correspond to each of their Attributes (for Standard Density. Add or subtract 25% or 50% accordingly for the other densities):