Dr John Freeman
@scifiguy.bsky.social
Hopeless ball of stress - writes booklets to help authors, gamers, GMs, and other creatives with the space and technology details of their projects, when they need that. 'Cos I went and got a PhD in engineering and physics, and I like helping people.
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
November 16, 2025 at 2:45 AM
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
November 14, 2025 at 2:49 AM
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
November 8, 2025 at 12:14 AM
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
November 8, 2025 at 12:11 AM
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
November 4, 2025 at 12:04 AM
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with detail & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding
$PWYW
legacy.drivethrurpg.com/product/5440...
#author #ttrpg #shamelessselfpromo
#space #astronomy #exploeation
Teegarden’s Star b: A Habitable Red Dwarf Planet?
www.centauri-dreams.org/2025/10/18/t...
Teegarden’s Star b: A Habitable Red Dwarf Planet?
www.centauri-dreams.org/2025/10/18/t...
October 27, 2025 at 12:53 AM
#space #astronomy #exploeation
Teegarden’s Star b: A Habitable Red Dwarf Planet?
www.centauri-dreams.org/2025/10/18/t...
Teegarden’s Star b: A Habitable Red Dwarf Planet?
www.centauri-dreams.org/2025/10/18/t...
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with details & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding.
$PWYW
legacy.drivethrurpg.com/product/5115...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with details & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding.
$PWYW
legacy.drivethrurpg.com/product/5115...
#author #ttrpg #shamelessselfpromo
October 26, 2025 at 8:11 PM
The Hard SF Worldbuilding Cookbooks
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with details & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding.
$PWYW
legacy.drivethrurpg.com/product/5115...
#author #ttrpg #shamelessselfpromo
Are you sci-fi worldbuilding? From nova to alien rainbows, this series has settings with details & visuals. Write - have the science as needed.
Inspiration, then #worldbuilding.
$PWYW
legacy.drivethrurpg.com/product/5115...
#author #ttrpg #shamelessselfpromo
The Hard SF Worldbuilding Cookbooks:
From a single world, to systems with dozens of planets, this bundle offers details and visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfpromoFriday
From a single world, to systems with dozens of planets, this bundle offers details and visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfpromoFriday
August 16, 2025 at 1:03 AM
The Hard SF Worldbuilding Cookbooks:
From a single world, to systems with dozens of planets, this bundle offers details and visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfpromoFriday
From a single world, to systems with dozens of planets, this bundle offers details and visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfpromoFriday
August 15, 2025 at 10:08 PM
The Hard SF Worldbuilding Cookbooks:
From a world orbiting a red dwarf, to stars with dozens of planets, this bundle offers detail & visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding.
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfpromo
From a world orbiting a red dwarf, to stars with dozens of planets, this bundle offers detail & visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding.
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfpromo
June 9, 2025 at 12:31 AM
The Hard SF Worldbuilding Cookbooks:
From a world orbiting a red dwarf, to stars with dozens of planets, this bundle offers detail & visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding.
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfpromo
From a world orbiting a red dwarf, to stars with dozens of planets, this bundle offers detail & visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding.
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfpromo
The Hard SF Worldbuilding Cookbooks:
From a world orbiting a red dwarf, to stars with dozens of planets, this bundle offers detail & visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding.
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfpromo
From a world orbiting a red dwarf, to stars with dozens of planets, this bundle offers detail & visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding.
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfpromo
June 9, 2025 at 12:30 AM
The Hard SF Worldbuilding Cookbooks:
From a world orbiting a red dwarf, to stars with dozens of planets, this bundle offers detail & visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding.
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfpromo
From a world orbiting a red dwarf, to stars with dozens of planets, this bundle offers detail & visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding.
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfpromo
The Hard SF Worldbuilding Cookbooks:
From a world orbiting a red dwarf, to stars with dozens of planets, this bundle offers detail & visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding.
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfpromo
From a world orbiting a red dwarf, to stars with dozens of planets, this bundle offers detail & visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding.
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfpromo
June 9, 2025 at 12:29 AM
The Hard SF Worldbuilding Cookbooks:
From a world orbiting a red dwarf, to stars with dozens of planets, this bundle offers detail & visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding.
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfpromo
From a world orbiting a red dwarf, to stars with dozens of planets, this bundle offers detail & visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding.
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfpromo
The Hard SF Worldbuilding Cookbooks:
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
April 18, 2025 at 10:57 PM
The Hard SF Worldbuilding Cookbooks:
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
The Hard SF Worldbuilding Cookbooks:
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
April 18, 2025 at 10:56 PM
The Hard SF Worldbuilding Cookbooks:
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
The Hard SF Worldbuilding Cookbooks:
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
April 18, 2025 at 10:55 PM
The Hard SF Worldbuilding Cookbooks:
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
The Hard SF Worldbuilding Cookbooks:
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
April 18, 2025 at 10:54 PM
The Hard SF Worldbuilding Cookbooks:
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
The Hard SF Worldbuilding Cookbooks:
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
April 18, 2025 at 10:53 PM
The Hard SF Worldbuilding Cookbooks:
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
The Hard SF Worldbuilding Cookbooks:
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
April 18, 2025 at 10:53 PM
The Hard SF Worldbuilding Cookbooks:
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
Are you a sci-fi author? From moons to supernova, this series offers details, visuals. Write a story - have the science as needed.
Inspiration, then #worldbuilding .
$PWYW
www.drivethrurpg.com/en/product/5...
#author #ttrpg #ShamelessSelfPromoFriday
#space #politics #war
Britain and France plot to replace Musk’s Starlink in Ukraine
www.msn.com/en-gb/money/...
Britain and France plot to replace Musk’s Starlink in Ukraine
www.msn.com/en-gb/money/...
March 7, 2025 at 2:52 AM
#space #politics #war
Britain and France plot to replace Musk’s Starlink in Ukraine
www.msn.com/en-gb/money/...
Britain and France plot to replace Musk’s Starlink in Ukraine
www.msn.com/en-gb/money/...
Donald who? 'Trump'. Ah ha ha , very funny trolls, the US has some rando off the street named 'Donald Trump' (trump is UK slang for flatulence) as president, like some dumb Simpsons or Family Guy episode.
Come on, you can do better than that
#thatpresidentisfake
Come on, you can do better than that
#thatpresidentisfake
January 29, 2025 at 12:47 AM
Donald who? 'Trump'. Ah ha ha , very funny trolls, the US has some rando off the street named 'Donald Trump' (trump is UK slang for flatulence) as president, like some dumb Simpsons or Family Guy episode.
Come on, you can do better than that
#thatpresidentisfake
Come on, you can do better than that
#thatpresidentisfake
Hey there writers and readers of BlueSky. Working as a writer means you cannot afford to miss a chance to promote yourself or your products - so writers: Let's do a #ShamelessSelfPromoSaturday. Drop those links and follow me, I'll like, repost, & #followback.
Readers: Find great new tales here!
Readers: Find great new tales here!
December 18, 2024 at 12:19 AM
Hey there writers and readers of BlueSky. Working as a writer means you cannot afford to miss a chance to promote yourself or your products - so writers: Let's do a #ShamelessSelfPromoSaturday. Drop those links and follow me, I'll like, repost, & #followback.
Readers: Find great new tales here!
Readers: Find great new tales here!
Hey there writers and readers of BlueSky: Working as a writer means you cannot afford to miss a chance to promote yourself or your products - so writers: Let's do a
#ShamelessSelfPromoSaturday : Drop those links and follow me, I'll like, repost, & #followback .
Readers: Find great new tales here!
#ShamelessSelfPromoSaturday : Drop those links and follow me, I'll like, repost, & #followback .
Readers: Find great new tales here!
December 15, 2024 at 12:16 AM
Hey there writers and readers of BlueSky: Working as a writer means you cannot afford to miss a chance to promote yourself or your products - so writers: Let's do a
#ShamelessSelfPromoSaturday : Drop those links and follow me, I'll like, repost, & #followback .
Readers: Find great new tales here!
#ShamelessSelfPromoSaturday : Drop those links and follow me, I'll like, repost, & #followback .
Readers: Find great new tales here!
