Questions tagged [science-based]

For questions that require answers based on hard science, not magic or pseudo-science, but do not require scientific citations. Contrast with the hard-science and reality-check tags. Do not use this tag as the only tag on a question.

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Plausibility of helium dominated atmospheres on super-Earths

I've been using this helpful diagram a lot for worldbuilding. Now I came to think about the fact that helium is more massive than hydrogen, thus a scenario where hydrogen escapes, but helium is ...
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distance between climate/geographical changes

I have an Earth-like world (approximately 1000CE technology--horse/mule for travel) that I want to have my characters traverse over the course of the book. I want the areas to have distinct geography/...
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Can a system of 10 planets be stable if star is not on the main sequence?

My star is 2.17 Solar masses. For narrative purposes, I decided this so it will collapse in the theoretical Quark star. Could such a big star that isn't on the main sequence (Because its an A type, ...