Some thoughts thanks to talk with @NorthTop @JetWarriorGames and @legoprodigy (I hope those are all the correct user accts on the forums).
Orbital Nebula: these are large long-term clouds of semi-volatile gasses that have coalesced inside of Eos' sphere of influence, dense regions inside of nebula can be corrosive, lightning storms can spawn in them as well, even out to the lighter periphery. Orbital Nebula form the large navigation hazards on the map and hide all sorts of unknown bounties inside of their domain.
Solar Nebula: these nebula spawn as small accumulations of interstellar gas and can grow to immense sizes if prevailing conditions (read: procedural weather RNG) allow, solar winds, planetary and lunar gravity, and even some large and powerful hyperlanes create motive forces that force Solar Nebula into motion and can cause them to grow, merge, or disperse depending on celestial conditions- especially strong conditions can even push these nebula faster than the best starship. Nebula can become ionically charged by long-term solar exposure or through interaction with radiators and thruster trails and turn into Thunderheads, roiling energetic clouds that disperse concentrations of electrostatic energy in massive arcing bolts of lightning, with large Thunderheads being more prone to rapid and unpredictable lightning- if they become dense enough Solar Nebula can also turn corrosive or thermally active, endangering any ships and structures they happen to move into.
Orbital Nebula: these are large long-term clouds of semi-volatile gasses that have coalesced inside of Eos' sphere of influence, dense regions inside of nebula can be corrosive, lightning storms can spawn in them as well, even out to the lighter periphery. Orbital Nebula form the large navigation hazards on the map and hide all sorts of unknown bounties inside of their domain.
Solar Nebula: these nebula spawn as small accumulations of interstellar gas and can grow to immense sizes if prevailing conditions (read: procedural weather RNG) allow, solar winds, planetary and lunar gravity, and even some large and powerful hyperlanes create motive forces that force Solar Nebula into motion and can cause them to grow, merge, or disperse depending on celestial conditions- especially strong conditions can even push these nebula faster than the best starship. Nebula can become ionically charged by long-term solar exposure or through interaction with radiators and thruster trails and turn into Thunderheads, roiling energetic clouds that disperse concentrations of electrostatic energy in massive arcing bolts of lightning, with large Thunderheads being more prone to rapid and unpredictable lightning- if they become dense enough Solar Nebula can also turn corrosive or thermally active, endangering any ships and structures they happen to move into.