Possibility for supernovas, multiple angle planetary rotation, and other system bodies/events.

white holes: releases converted atomic mass of vanished black hole as energy. Since an atomic bomb only utilizes 1/10th of a billionth of the energy of a single atom, and black holes engulf entire planets (even assuming for 1 atoms energy release pr 24 hours to tone it down a bit) this would cause mass-irradiation resulting in a "Dead Zone" for life and planets. However large fuel itch (in the form of hyper-irradiated materials) asteroid fields would form around it.
rare due to required negative-mass antimatter supernova needed for formation. Would require extensive shielding to player so as to prevent immediate irradiation / incineration by the massive energy release. also extremely difficult.


black holes: rich, dense asteroid fields with high radiation, and ultra-high gravity would form around this singularity.
rare due to difficulty.

supernovas: exploded/exploding star would convert nearby planets to massive atmosphere-having asteroid fields barren of life.
rare due to mass-destruction.

worm holes: allow instant travel to a single set worm hole within the sector possibility for planetary migration.

varied size, shape, color for stars, as well as dynamic multi axis orbits for planetary bodies, and binary systems would be excellent.
asteroid fields could be elliptical or ring-like in shape with little to no life. Gas giants could be explored in a pressure suit as they have a surface-type that would be very interesting, and metal rich.

non-water/acid/poison liquids/ices on colder planets.

dynamic sub-biomes or much larger number of standard biomes.

varied visibility, and atmosphere composition.


just some ideas.