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Questions tagged [hollow-earth]

For questions describing a planet that is partially or mostly empty, internally.

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0answers
92 views

what occupational categories are believable during world war 2? [closed]

I am making a custom pathfinder campaign that is set during world war 2 (will explain how modern becomes medieval). I need to come up with a list of occupations that the players can choose from and ...
16
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4answers
3k views

Hollow Earth - how to measure it?

I'm making a map for my friend - I drew a pretty neat cartographic grid with a proper map projection - and then he reminded me that his world is actually an inverted Earth with a glowing ball of ...
17
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6answers
5k views

Can a habitable planet have two separate crusts, both of which can sustain life?

Can a habitable planet have two separate crusts, both of which can sustain life? I am wondering if through the planet's creation, over time through some form of mantle cooling/erosion combination, ...
6
votes
3answers
287 views

A structually self-supporting hollow Earth?

Is it possible to have a structurally self-supporting hollow Earth where the weight of the shell is balanced against the atmospheric pressure inside? It must be human habitable (gravity is nice but ...
8
votes
1answer
190 views

How to use a balloon at the Center of the Earth?

Imagine a world like Pellucidar or Skartaris. This world exists on the inside of a 'hollow Earth'. The laws of physics apply as normal, except as follows There is a gravitational force that attracts ...
0
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2answers
124 views

Planetary core building [duplicate]

Let's say we have 2 planets, one being 'a' (the bigger one) and one being 'b'. Planet a is completely hollow inside with planet b is inside of it. My question is how much gravitational force would ...
7
votes
4answers
345 views

Spotlight distribution in a hollow earth?

I've been toying with a concept for a hollow/inner Earth universe in which I would like to achieve an even distribution of light. The pickle is that the "sun" of this world operates like a beacon/...
1
vote
1answer
207 views

Can a circumnavigation prove someone is living in Hollow Earth? [duplicate]

Imagine that the Hollow Earth theory is actually right. We've been living inside a planet shell. The gravity: we are "glued" to the ground, unlike this explanation that conclude we are should be in ...
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3answers
163 views

Does the thickness and diameter of a hollow earth give an affect to the overall gravity inside?

I looked at a few articles that talk about the hollow earth. All answers state that the gravity would be 0G no matter the position of an object inside. Though what I'm not sure is that does the ...
2
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1answer
90 views

What would some of the societal impacts of the advent of optical instruments be in a concave hollow earth? [closed]

I'm working on building a world in a fantasy setting that exists basically as a 'hollow earth'. This world is earth sized and earthlike, just hollow with a mini-sun in the center, and humans live on ...
1
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0answers
141 views

I'm trying to write a story connected with the theory of Hollow Earth [closed]

I cannot post here the links yet, but you can just search it up, there's so many links out there that will explain to you the theory. Honestly, I don't believe in this theory but I found it ...
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2answers
173 views

A planet inside out [duplicate]

I've had this dream tonight about a planet that is Earth but inside out. The outside of the planet are rocks, stone, a surface like that of the moon. There a few holes that tunnel through the surface ...
9
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7answers
2k views

Gravity on a hollow non-enclosed world

The normal condition of life in a planet (Earth right now) is that below us is the planet's core, and above us is the sky. Now if there's a hollow planet like above, is that possible? How does ...
6
votes
2answers
1k views

Would the sunset look similar to ours on a floating-island earth?

Assume that this earth is celestially equivalent to ours: e.g. same solar system, same position, same orbit, etc. Would the sunset look similar to ours on a floating-island earth? The earth itself ...
1
vote
1answer
86 views

Seeing Through The Earth [closed]

What would happen if the earth was made up of some transparent, see-through material, and it was hollow? Nothing else is different. Would we able to see the other side of the earth, or would it be too ...
8
votes
6answers
1k views

What is the color of the sky in a hollow earth?

Does the position of the sun in a hollow earth scenario affect the way light scattering would "color" the sky? My understanding is the reddish-orange color during sunrise/sunset is caused by the sun ...
18
votes
9answers
5k views

Is a moon inside a hollow Earth possible?

The Hollow Earth theory is/was a pseudoscientific idea that our world is actually on the inside of a large sphere. The "sky" points inward towards the center, where the "Sun" (a light source) is, ...
10
votes
3answers
3k views

What technology is required to detect an underground civilization?

Suppose a world has huge underground caverns, capable of supporting large agricultural societies (something like described in Our Hollow Earth). What technological level, or better yet specific ...