All Questions
Tagged with science-based moons
201
questions
2
votes
2
answers
127
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Lagrange Points regarding a moon 1.5 times the mass of Earth's Moon and one 0.75 times the mass of Earth's Moon
Working on a lunar orbit system. As place holder numbers, two moons are orbiting a planet equal to earth's mass. One moon, Selenara, is 1.5 times the mass of Earth's moon, and the other, Thoth, is .75 ...
- 413
5
votes
2
answers
176
views
How would be a Lunisolar Calendar with 2 Moons?
The world I'm building it's a Super-Earth named Tempus, and it has 2 moons in an orbital resonance. One of the moons, named Tidra Moon, is closest to the planet and basically has the same influence on ...
- 71
8
votes
1
answer
169
views
How long would a crater/mare on the Moon be glowing red and visible from earth?
As part of the backstory of my setting, a wormhole base on the Moon catastrophically failed around 500 years ago. The energy released was enough to melt a huge portion (edit: approximately size of ...
- 301
3
votes
2
answers
135
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How to calculate the Draconic month on a fictional world
I am working on a world and want to be able to find out when Eclipses occur, and I found you need to know the Draconic Month, I think I have everything I need to find it, I have the inclination to the ...
- 589
6
votes
1
answer
295
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Non-deadly gas giant moon "weeks"?
There are already a lot of questions on WB:SE about habitable gas giant moons, so I'll try and be specific:
I have a gas giant of mass approximately $2\cdot10^{27}\text{ kg}$ and radius approximately ...
- 5,435
5
votes
3
answers
236
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Is it possible to have an ocean moon orbit a large ice giant via tidal forces and a greenhouse effect within the moon?
I am trying to make a moon orbiting a large ice giant that has a liquid ocean via this thought process:
The moon has high eccentricity (though it is still in spherical shape), so raw tidal forces ...
- 263
4
votes
1
answer
425
views
What are the tidal implications of The Moon having a moon?
This is my first post. I apologise for any infractions I may have committed, I will try to be better in my next posts.
To clarify, this question is not about if Earth had 'two moons'. This is instead ...
- 189
11
votes
10
answers
3k
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Permanent Full moon via "Magic"
The Problem
I had in mind giving my world a permanent full moon for a long time. Though I generally ran into 2 problems along the way.
Firstly I wanted of course to make it appear as if it was always ...
- 1,548
7
votes
5
answers
2k
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How much mining can we get out of Pasiphae?
Pasiphae is an irregular moon of Jupiter in a retrograde orbit. It's probably an asteroid capture and is only about 60 kilometers across (compare to Europa's 3121.6 km diameter).
Suppose that I set up ...
- 5,435
7
votes
2
answers
336
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Could a cold-cored planet be protected by a hot-cored moon?
This is an earth-sized planet, unable to produce an adequately protective magnetic field. Could a moon with a hot, iron/nickel core produce a magnetosphere large enough to encompass the planet and ...
- 508
2
votes
1
answer
147
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Could one moon appear to always follow/lead another in the sky?
Is there any way a second moon would appear to hang out near the closer one in the sky? For example always appearing either ahead of or behind throughout the year, or even alternating between those ...
- 53
2
votes
3
answers
270
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Question about speculative human biology
What kind of evolutions would humanity have to undergo to be able to live comfortably on the moon or any other sufficently low-mass body? As I am aware that it can be bad for bones and the ...
- 589
2
votes
3
answers
388
views
How would a planet's surface be younger than the planet itself? [closed]
Europa, one of Jupiter's moons, is 4.5 billion years old (like Earth.) However, its surface is only 20-180 million years old. What could lead to a planet/moon's surface being younger than the planet/...
2
votes
2
answers
238
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What astronomical situation could account for the PERCEPTION of a very erratic day / night cycle for a planetbound population with limited science?
I would like to create a world that is at a roughly medieval level of scientific understanding and which - as far as it appears to the inhabitants of that world - has a highly erratic day and night ...
- 21
2
votes
2
answers
132
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How to find visibility of stars given a certain moon brightness
How would you be able to calculate what magnitude of stars would be visible given a certain brightness of the moon. As I know that the visibility of stars are based on their compared magnitude to a ...
- 589