All Questions
70
questions
3
votes
2
answers
327
views
Where would aurora borealis be visible if the earth was rotated to move its axis?
The magnetic north pole, geographic north pole (centre of the axis of rotation), and solar-system-north are all approximately aligned, and aurora borealis is visible at the north and south poles ...
- 2,249
7
votes
2
answers
130
views
How close to a star could a dense asteroid belt reasonably form?
I would like to have an asteroid belt "close" to a star. I want it to contain "large" asteroids. Is this plausible?
I believe the location of our real life asteroid belt is ...
- 2,249
4
votes
3
answers
266
views
Could a slow rotating planet combined with high density atmosphere create high winds?
I am trying to design an alien ecosystem around a K type star. My idea was to have purple plants and high wind atmosphere so originally I wanted to make it tidally locked. However after watching some ...
- 197
18
votes
8
answers
7k
views
How long would it take us to detect that the earth had been enclosed in a shell 1 light year in radius?
Suppose we put a shell around the solar system that displays a 2D image of the rest of the universe on its inner surface. What year would we have had telescopes powerful enough to determine that this ...
- 1,973
6
votes
1
answer
363
views
What dictates whether an orbit gets disrupted or stabilised due to an orbital resonance?
Context:
I've got an asteroid belt analogue situated between a Gas giant and a Super-earth. I knew about resonances, so I started calculating them and placing some of them in the belt, especially ones ...
- 462
1
vote
0
answers
102
views
Jupiter's moon Europa - is it possible to colonize Europa? [closed]
So basically, I have to write a thesis paper because I'm in the last year of high school. It is an independent research project and the culminating work of my studies in school, so it represents my ...
- 11
10
votes
8
answers
1k
views
Retrofitting geocentrism - what replaces the star?
The goal is to devise a plausible geocentric system in appearance. However, for simplicity, we will need only to examine the one planet case. And more crucially, this one Earth-like body is to be the ...
- 8,789
3
votes
1
answer
542
views
Replacing the sun with an type A star (Fomalhaut) in a fantasy solar system where there is an habitable planet
Lets says there is a planet in the goldilocks zone of a type A star (luminosity of 16 and mass of 1.9 (like the star Fomalhaut))
How far would the type A star need to be from the planet and how would ...
- 632
2
votes
0
answers
95
views
Questions about my binary planet system [closed]
I’ve recently designed a star system containing a habitable double planetary system, but I still have several questions to fill in I need answered.
My binary planet is a Venus sized (mostly) Earth-...
- 611
3
votes
1
answer
356
views
What kind of atmospheric composition would make the sky look green and still be breathable?
In my story scientists discovered a planet that look green from the telescope and they used a advanced starship to go there and the y found out that the planet is habitable with a breathable ...
- 1,899
4
votes
2
answers
936
views
What would happen if a neutron star approached the solar system?
Given its enormous eletromagnetic field and gravity( and probably gravitational waves would be very powerful) what would happen if a neutron star approached Earth? What if approached just by few light ...
- 1,899
6
votes
2
answers
236
views
Feasibility of multiple satellites around a planet inspired by Luyten B/Gliese 273b
I am writing a science fantasy book that takes place on the planet Luyt (inspired by Luyten B/Gliese 273b).
Because the orbital period of the planet is about 18.6 days and I have chosen to make the ...
4
votes
2
answers
543
views
How close could a creature longer than Jupiter get to Earth without destroying it?
So basic introduction: my world has things which naturally should never exist due to seemingly violating certain laws we deem as natural, for this, let's just call them "anomalies". Among ...
- 14.2k
3
votes
2
answers
831
views
Is it possible for a future civilization to concentrate the galaxies (or some of them) of the universe?
In the world I describe there is not much time left before the expansion of space takes its toll. Galaxies are already accelerating away from each other on a negatively curved spacetime. The expansion ...
4
votes
2
answers
1k
views
What is the minimum size of an habitable planet to have two moons?
For the sake of the question, let's define a moon as a natural satellite at least half the size of our Moon. It needs to be spherical like our Moon, not like Phobos and Deimos on Mars. The imaginary ...
- 1,573