>>41906
Is it set to feature any time or cross-dimensional travel?
One thing to do to make things easier is to classify planets according to type, livability, or composition.
Heres one of my lists of planet types, should be a help to you if you plan to do specific planets with names.
Fire dwarf - very close to a star, scalding hot deadly airless world similar to mercury.
Clouded Sphere - Any rocky world with an atmosphere so thick the surface isn't possible to view from space. Often either very hot, very cold, or very acidic. Only applies to rock worlds.
Garden Yard - A world similar to earth.
Spent world - A world in which 90 to 99 percent of every single resource of every single type has been completely finally and absolutely consumed or expended. Frequently very old worlds.
Storm giant - Very active, fast turning gas giant with lots of precipitation, wind, and lightning.
Ring giant - Any gas giant with 1 or more orbiting rings. This only includes gas giants with easily visible rings, gas giants with micro-rings that aren't visible with the unaided eye don't qualify. Usually fairly sedate worlds, the rings exert some influence on the behavior of the atmosphere.
Cold giant - Distant from its home star and very cold, typically its atmosphere consists of slush, lighter than air fluids, and very cold mist, with snow sleet hail and lightning being fairly commonplace.
Ice giant - Extremely unbearably cold and distant from it's star, Ice giants are gas giants that are so cold large percentages of it's atmosphere is freely floating icebergs, ice sheets, ice cakes, and seas of lighter than air semi-fluid slush, all of which moves very slowly, if at all. Some are so cold that they have effectively no weather period.
Ice dwarf - Freezing cold, rocky worlds at the edge of systems, frequently so cold that they have no atmosphere to speak of, though the abundance of incoming outer space radioactivity means they often have significantly more of any of a variety of radioactive elements.