So we can't have a Pandora style map because it does not fit into your definition of science FICTION? FICTION being the key word here. LOL.
None of the planets nor moons have something similar to "flying rocks". Which is impossible in terms of physics by the way.
This is sci fi not real life. Most of what is happening in this game and ANY sci fi is crossing the line in any realistic sense whatsoever.
Impossible you say? Why don't you explain fully how everything else that happens in this game IS possible then, haha.
How about this for an explanation based on the concept of flux pinning:
Flux pinning is the phenomenon where a superconductor is pinned in space above a magnet. The superconductor must be a type-II superconductor because type-I superconductors cannot be penetrated by magnetic fields. The act of magnetic penetration is what makes flux pinning possible. At higher magnetic fields (above Hc1 and below Hc2) the superconductor allows magnetic flux to enter in quantized packets surrounded by a superconducting current vortex (see Quantum vortex). These sites of penetration are known as flux tubes.
Floating Mountains of Pandora are composed of a novel unknown Type Superconductor that has characteristics of Type 2 SC that allows for Quantum Flux Pinning to occur at high(er) temperatures. The area in which the mountains float is distorted by augmented magnetic fields that interact with the composition of the unique type superconductive materials of the rock causing them to be flux pinned, BLAH BLAH BLAH insert whatever further explanation is needed to play a fun map. LOL
Good Grief, lets take it down a notch with this "that's not possible" attitude for a game base on fiction as it becomes quite laughable at a certain point.