Publisher's blurb:
Galaxy Builder Decks: Star System Mats is a set of double-sided mats of inner and outer orbital tracks for creating star systems during worldbuilding or on the fly during a game. Each mat has two solid-line main orbital tracks and one to two dashed-line secondary orbital tracks. On the reverse side is a duplicate of the orbits but adds a feature such as asteroid fields. These mats are designed to work with Planet cards with Planet Trait cards to quickly create settings on the table for your stories.
Mats can be spread out in a row, showing orbits from the system's center to the outermost orbits. Or you can rotate mats 180 degrees and create a center star system point extending outwards on both sides. Mats are not restricted to visualizing just star systems as a whole, but can be used to “zoom in" on a single planetary system with orbiting bodies. Put a gas giant at the center and show all its moon or ring orbits. Zoom in even further to show the low and high orbits for a lone planet, providing a scale to show orbital stations and space traffic in proximity.