This whole thing seems confused to me. DNS is not a hierarchical addressing system, but a hierarchical naming authority system. It makes sense for NASA or ESA

This whole thing seems confused to me. DNS is not a hierarchical addressing system, but a hierarchical naming authority system. It makes sense for NASA or ESA to have domains to name all their facilities or craft, and to use whatever sub-organizational structures best suit their methods. This doesn't necessarily have anything to do with locations or trajectories. One could argue that in a science fiction future, we need a new top-level to disambiguate our current networking universe. But is our current system earth-centric or just human-centric? Isn't it a leap to assume planets will be organizational units above current ones, rather than just internal details of other existing nations or multinational conglomerates?