allowed_planet_classes = {
	pc_ocean
	pc_pd_cascadian
	pc_pd_swamp
	pc_pd_fog
	pc_pd_kelp
	pc_pd_algae
	pc_pd_columnar
	pc_pd_crag
	pc_pd_reef
	pc_pd_archipelago
	orbit_water_panthalassic
	orbit_archipelagic
	orbit_panthalassic
	pc_panthalassic
	orbit_cryopelagic
	orbit_thermopelagic
	orbit_panpelagic
	pc_panpelagic
	pc_asp_ocean_red
	pc_azur_ocean
	pc_giga_edge_of_eternity
	pc_epap_aquatic
}
