From the publisher blurb:
As your characters set off into the universe, the right backdrop - the star system or systems they're voyaging through - can help their story be told. It's like finding a home - the neighbourhood has to be right for you: Is it close to the shops? How does the neighbourhood look?
Is that smoke?
So the aim of this booklet is to give you a run-down on a realistic star system, centred on a medium sized, yellow-white sun - in particular, how it would be experienced from an Earth-like planet in its habitable zone. The sun of this particular system is what is known as a type G5 star: A larger than average star that's just a little smaller than our Sun. It lives one to one and a half times as long as our Sun (10 -15 billion years), and is well behaved once it's out of its early youth (its first half a billion years or so) - major flares or solar storms are rare from most G5 stars, making it a good home for a habitable world. At the time of writing, astronomers have yet to come up with a classification system for star systems, so the nom-de-plume we offer here, for a system centred around a single such G5 star is a ‘Coalfire system’ owing to the friendly, but hotter and brighter than average, nature of the central star. Beyond the broad themes you can set specific details to your needs - for example the number and type of other planets and the galactic neighbourhood. The booklet goes into:
Sky colour: p7
Plant colour: p7
Visual size of planets: p10
Other sky phenomena: p8
Travel within the system: p6
Opportunities: p7
Hazards: p7
Prompts: p8
Visuals from an Earth-like planet in the habitable zone: p7
Combining star systems into clusters: p4
How to go off book with your sun and sky colours: p5
Planets to populate your system with: (E.G. Water worlds, volcanic worlds): p9
Galactic Settings for the system: (E.G. Galactic core, disk): p27
General notes: p34
Glossary of terms: p45