Nah, the Nexus is deliberately confusing and chaotic. It's less of a planet and more of a warped plane of existence give some semblance of shape due to Juno's tits. And even then the Nexus is wobbly and constantly shifting because Juno probably doesn't wear a bra. It's not kept in check so much as it is fondled into a desirable or new shape, at least until the hands get tired and for a while the Nexus remains in stasis. Then someone else comes along, copes a feel, and changes [s]Juno's boobies[/s] the Nexus, Rinse and repeat.