Zeteticists would argue that Saturn and the other planets (called wondering stars by the ancients - in fact, the word "planet" comes from the Greek word planetes, meaning "wanderer.") are located in a layer beyond the Moon and Sun, but not “out there” in outer space - at least, that’s what they tell me when I ask them questions about this.

“ People need to be aware that there is a range of models that could explain the observations. For instance, I can construct you a spherically symmetrical universe with Earth at its center, and you cannot disprove it based on observations. You can only exclude it on philosophical grounds. In my view there is absolutely nothing wrong in that. What I want to bring into the open is the fact that we are using philosophical criteria in choosing our models. A lot of cosmology tries to hide that. ”

—Cosmologist George Ellis in Scientific American, "Thinking Globally, Acting Universally", October 1995