In Marshal Savage's TMP the Solaria phase concerns the colonization of the solar orbital space of our solar system and the ultimate form of habitat civilization will create there. Thus it represents a sort of climax to the 'story' of that civilization's projected history. While this story continues in his Galactia phase, that phase is essentially about the spread of that Solaria civilization, a replication of it from star to star across the galaxy. And so Solaria really represents an ultimate form for human civilization as a whole. Shell Habitats: Heliopolis Ring: SolarSnowflake and SolarRibbon: