Unanswered Questions

81 questions with no upvoted or accepted answers
81
votes
0answers
3k 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 ...
10
votes
1answer
244 views

Weather with extreme seasons

Assuming the axial tilt of the Earth was increased to roughly 30°, and the orbital eccentricity roughly doubled(0.03 as opposed to 0.016) so that the average temperature stayed the same, but the ...
6
votes
2answers
80 views

Reasonable atmosphere for an Earth-like planet orbiting a K dwarf star (including abiotic oxygen)

I would like for my planet to be close to Earth’s size (so similar gravity), with much of the surface covered by water, containing atmospheric oxygen from abiotic processes (the photocatalytic ...
6
votes
0answers
49 views

What should an inactive planet's topology be for nutrient circulation?

I'm trying to engineer an Earth mass planet built initially out of pure silicon dioxide (silica). So basically, imagine a glass sphere slightly larger than Earth somewhere in the Goldilocks zone, ...
6
votes
1answer
260 views

How do I determine the physical size of a quartz crystal of a given shape and vibrational mode needed to approximate a specific resonant frequency?

So, one of my D&D characters has a cut/relief-carved quartz crystal amulet (medallion shaped) that's both an arcane focus (crystal) and a holy symbol (amulet), and I thought it would be a good ...
5
votes
1answer
150 views

How light can a quadruped's legs and relevant muscles be in proportion to their body without losing function?

Dragon? Only possible with Magic? No. Dragon: big, strong, hard-to-kill, flies. Marden: 25% of total mass IS dedicated to flight. Problem! Hard-to-kill? Small hitbox. All organs in ribcage, even a ...
5
votes
0answers
93 views

What blood pigment type is immune to ammonia poisoning?

I am designing a world in which the biological solvent is an ammonia-water mixture and need help finding out which blood pigments (Hemoglobin, Hemocyanin etc.) would be immune to the negative effects ...
5
votes
0answers
118 views

Is my topology/are my climate zones alright?

This is my first try at worldbuilding, and I need some feedback. I've filled in what I hope are realistic climate zones, ocean currents and topology for this current state of the world, all done in ...
5
votes
1answer
142 views

How would a K3 civilization collect the majority of the universes available mass in the form of Intracluster gas?

My story at its final stages is based around K3 civilizations whose technologies are within the known laws of physics and for plot reasons have managed to control all superclusters and lone galaxies ...
5
votes
0answers
100 views

In the orthogonal series, when finding the 4-force between two charges would the entire world line of each need to be taken into account?

Four-Velocity is the derivative of four-position with respect to proper time, four-acceleration is the derivative of four-velocity with respect to proper time, and four-force is equal to rest mass ...
5
votes
0answers
80 views

Could a universe with 3 or more $U(1)$ charges that are all equivalent to each other be self consistent?

In alternate universe there are at least 3 $U(1)$ charges. An elementary fermion can have a value of $±1$, or $0$ for any of these types of charge. The value an elementary fermion has for one of ...
5
votes
1answer
201 views

Binary Star System Build - Alpha Centauri

I'm not sure if this site or Astronomy would be better, but I figured I would try here instead. I am attempting to create a [semi]plausible star system in Alpha Centauri for a series. The system was ...
5
votes
2answers
204 views

Spinning up the Moon: does it survive the event?

The year is 2xxx. A large asteroid is spotted on a collision course with Earth. The more time it passes, the more it is clear that the impact cannot be avoided. But when most of humanity is starting ...
4
votes
0answers
85 views

Are these ocean currents realistic for a planet that rotates 16 times slower than Earth?

Ocean Current Map: The straight red lines are 60* North and South, and the straight blue lines are 30* North and South. The curved blue lines with an arrow represent cold currents, while the curved ...
4
votes
1answer
52 views

What effect would exceptionally tall mountains have on high-altitude wind currents in an Earth-like environment?

I am currently in the process of building my fantasy world from the ground up and as I finished my height map, I realized I had some pretty tall mountains. Not just a few of those stereotypical lone, ...

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