Ring
Ring (Pic 1) will help make a tighten gap between each planets and in its position
The 2 Type of Space's Ring
1. Big Ring = Asteroid Belt between Mars and Jupiter
If it rotates counterclockwise as well.....It will push the planets on both sides from each other to faraway (Inside = Mercury, Venus, Earth, Mars and Outside = Jupiter, Saturn, Neptune, Urenus) (Pic 2)
2. Small Ring = Moon, Lunar, Small Asteroid etc. that orbits around planets such as Earth, Jupiter, Saturn etc.
Related Link
Gear
Fan Motor
Bushing
Ring
Rotation Pattern
Switching Speed
Fly