Unanswered Questions

21 questions with no upvoted or accepted answers
49
votes
0answers
2k views

How soon can the first stars form?

Introduction In our universe, the cosmic microwave background was formed approximately 400,000 years after the Big Bang. It was hot, but within a few million years after the Big Bang, it would no ...
20
votes
0answers
373 views

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 ...
7
votes
0answers
217 views

Schwarzschild Metric in a universe with the same space time metric as that described in the orthogonal series, but with massive gravitons?

The universe described in the orthogonal series http://www.gregegan.net/ORTHOGONAL/00/PM.html is one, in which the minus sign in the space time interval is replaced with a plus sign. So this universe ...
6
votes
0answers
84 views

How to calculate atmospheric circulation cells

Does anyone know an equation or something along those lines for calculating how many and the locations of atmospheric circulation cells for a planet? Also, does the planet's radius and atmospheric ...
4
votes
0answers
46 views

How much energy do plants produce?

Consider a magic system that follows the Eragon model; "doing it by magic takes just as much (biological) energy as doing it the mundane way". In Eragon, magical energy can be drawn from other living ...
3
votes
0answers
69 views

Days and Seasons via Daily Eclipses in a Flat World

While working on the cosmos of a flat world, I came upon the idea of using a dim sum rotating about an axis through the central pole (as described here) in order to accomplish days and seasons. The ...
3
votes
0answers
86 views

Native American Society in a World Where Beringia Is Still High and Dry

Multiple times in Earth's geological history, a bridge connected Asia to North America, bringing in an influx of colonists. Without Beringia, North America would never have the iconic Triceratops or ...
3
votes
1answer
128 views

How would a slip-strike fault develop in my terrain?

I am designing a fictitious continent, and as part of this I am also designing the prehistoric development of the continent up to the present day. A particular tricky part of this has been that, in ...
2
votes
0answers
49 views

Properties of a new engine

In my story, I need a spaceplane, that is, a shuttle which can fly in an atmosphere as well as in space. It needs to be able to land from space, and then take off and go to space without refuelling on ...
2
votes
1answer
51 views

Sleep Cycles on very fast and very slow rotating worlds Part 2

This is the same as my previous question Sleep Cycles on very fast and very slow rotating worlds Part 1 but this part is for how humans settling these world would alter their sleep cycles! I would ...
2
votes
0answers
80 views

Optimal geography for a thriving caldera centered civilisation?

What would be the optimal geography for a thriving capital, located in a caldera ? I'm building a fantasy world with multiple intelligent species and civilisations. There is magic in this world, but ...
1
vote
2answers
37 views

Why would a creature only have feathers on its back?

I have a new creature from my complex remembered dreams. It's skin color is a dark color similar to the skin of a Silkie chicken. The thing I saw in the dream also has white feathers. It's body is ...
1
vote
0answers
42 views

Can you replace goethite with something else in limpet teeth to decrease its density and maintain its strength?

The limpet teeth's microscopic structure is analogous to man-made short-fiber composites. Its strength depends on the direction of the force, relative to the orientation of the fibers. https://www....
1
vote
2answers
79 views

Can an Unstable Ternary Star System Last Several Hundred Years?

After reading the following question, I know that there are not that many solutions to the 3-body problem, and I know that a ternary system is unstable. The 3 stars all orbit each other in a rotating ...
0
votes
0answers
24 views

time precision of system logs

All, As part of an SF writing project, I would like information on the accuracy of computer system logs, worldwide. One could think of a global map that had a ...

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