No, only the ones that have changed from the default.
edit: remember that 99.99% of the star systems are and will remain uninhabited, and the rate at which changes occur to those procedurally generated worlds will be quite slow. The actual amount of "deviations" that have to be recorded will remain in some tens of thousands of worlds. Not a biggie.
edit: remember that 99.99% of the star systems are and will remain uninhabited, and the rate at which changes occur to those procedurally generated worlds will be quite slow. The actual amount of "deviations" that have to be recorded will remain in some tens of thousands of worlds. Not a biggie.