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Posts by John O‭

5 posts
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Q&A Can the color of an alien sky be calculated solely from atmospheric composition and the star's (or stars') spectral type(s)?

What exactly are the relevant numbers for such a calculation, and can it account for the color of the sky? By sky color, I mean the day to day hue that humans (or something else with very similar ...

1 answer  ·  posted 5y ago by John O‭  ·  last activity 5y ago by John O‭

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Q&A Given the mass and composition of a planet, can one determine what the radius should be?

I'm trying to auto-generate random solar systems, and I'm basically just allocating 2% of the total system mass to planets (and moons). It provides interesting results, I always have a few gas gian...

1 answer  ·  posted 6y ago by John O‭  ·  last activity 6y ago by John O‭

Question planets gravity
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Q&A Sun-like sky objects in a flat world?

I'm positing a non-planetary world but within Euclidean space. This world has things that resemble mountains (but probably not plate tectonics). Elevation varies considerably, but on average it is ...

3 answers  ·  posted 5y ago by John O‭  ·  last activity 5y ago by John O‭

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Q&A Randomly generating plausible star types for a synthetic galaxy?

I'd like to randomly generate between 1 and 20 million stars for a spiral galaxy resembling our Milky Way. This is of course far fewer than our galaxy (estimated between 150 to 300 billion), but I'...

2 answers  ·  posted 5y ago by John O‭  ·  last activity 5y ago by John O‭

Question stars galactic
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Q&A What FTL models are appropriate given my constraints?

I'd like to have faster-than-light travel (and communications) be an late-game option for a video game I am working on. The extent of the playable universe is approximately 4 million light years in...

5 answers  ·  posted 4y ago by John O‭  ·  last activity 4y ago by John O‭