I've been operating on the assumption that it works like the planet Aether (ha) from Metroid Prime 2, in which you see the "true" version as you approach and land while the "echo" planet is only able to be breached through rifts in the dimensional walls. And that as you pull away from one, you enter back into "true" space as it's a localized shattering of spacetime but as the night sky on the First is different than it is on the Source this theory is out the window right now, unless one of our own skywatchers has put the work into examining the stars.