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Hard S.F. Worldbuilding Cookbooks #3: Rogue PlanetsClick to magnify
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Hard S.F. Worldbuilding Cookbooks #3: Rogue Planets

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Hard SF Worldbuilding Cookbook #3: Rogue Planets

A how-to guide for writers and roleplayers


Start with your story. Choose locations, find situations, and inspire novel prompts as you need them. Have the science behind them at your fingertips, when you want it. 

Inspiration first, then worldbuilding.

The Hard SF Worldbuilding Cookbooks:

Written for worldbuilders who want their in-world science to be more than just technobabble, the Hard SF Cookbooks are focussed on story and dramatic possibilities rather than just being ‘here’s the science, now go create’. Each starts with a guide for the aspiring space traveller - where to go and how to avoid being fried, zapped, and/or blasted - then pulls out to the artist, writer and GM point-of-view, with lookup tables so you can start from the trope or scenario you want, find new story hooks, and work back towards the science behind them.

#3: Rogue Planets:
Beyond the oasis of light and warmth made by stars lie the vast, freezing, voids of interstellar space. Through these wander the rogue planets: Worlds spat into the dark during their solar system's early youth, and worlds that formed without any warming star to begin with. But, despite billions of years in the interstellar night, many of them are not entirely dead - some could support entire civilisations in the darkness. Nor are they exactly rare...
Using a series of simple, flexible look-up tables, this book sets out a range of possible, scientifically plausible, rogue planets - including moon systems for rogue gas giants, radiation,  likely environments, hazards, opportunities and visuals. Putting storytelling ahead of technical detail, but with plenty of in-depth material for those wanting to do a deeper dive, this third installment in the Hard SF Worldbuilding Cookbooks series covers:

Locations in interstellar space - Page 8

Rogue planet tropes - page 17

Trope modifiers - page 29

Rogue gas giant planets and their moon systems - page 31

Tropes for moons of rogue gas giants - page 39

Glossary - page 55

Equations used - page 61

Further reading - page 63

John Freeman is PhD physicist, who acts as advisor for world-builders when they want some real world details to help their creations. This series owes its existence to the GMs, writers, artists, and even historians who collaborated with him (and who keep him in touch with the real world, and supply him with snacks)

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File Last Updated:
July 26, 2021
This title was added to our catalog on July 29, 2021.
John Freeman
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