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162
votes
Accepted
An Earth-like planet is found in another solar system. What are the top priorities after lan...
to construct a closed life support system, then you have no business trying to construct a colony many light years away, with no support and no backup and no actual certainty that the world is safe or habitable …
156
votes
21
answers
115k
views
What is the minimum human population necessary for a sustainable colony?
How many humans are needed in order to sustain and grow a steady population in a habitable area? Assume resources are adequate and the environment is favorable. …
121
votes
Accepted
Could a planet made completely of water exist?
The planet then 'migrates' inwards and into the habitable zone. What qualifies as 'migrates' is a bit beyond me, but although it's unlikely to form in the habitable zone, it can move into it. …
121
votes
Accepted
A list of worldbuilding resources
Celestial Mechanics
Habitability/Goldilocks Zone Calculator for Earth-like planets
Creating a realistic world(s) map - Stars
Creating a realistic world(s) map - planetary systems
Building the ultimate …
120
votes
7
answers
44k
views
How would having multiple moons affect tides?
Assuming that a planet with several moons were habitable in the first place and has significant oceans (greater than 50% of the surface), what effect would multiple moons with independent orbits and revolution …
119
votes
11
answers
26k
views
Could a Dwarven Civilization Exist?
How can they cope with this and keep massive underground networks such as the Mines of Moria habitable? Today we use fans to generate circulating air networks. …
109
votes
A planet you can take off from, but never land back
This made the planet habitable and allowed the aliens to terraform the planet and create an ecosystem.
However, the alien civilization isn't there anymore. …
92
votes
Which major solar system body could most realistically be artificial?
and many others
So many unique properties makes more realistic synthesizing habitable planets than searching them for single-galaxy civilization. …
86
votes
8
answers
9k
views
Tree Shape on a Tidally Locked World
The habitable ring is an Earth analogue. The atmosphere and gravity are similar to Earth's, and we're going to pretend the wind is negligible. …
83
votes
Accepted
Can two adjacent, life-sustaining planets orbit a star such that they are rarely near each o...
You could put both planets in the habitable zone on horseshoe orbits. Janus and Epimetheus orbit Saturn on this type of orbit. …
67
votes
Why would precursors create devices that can survive and still work after hundreds of years?
The Precursors may even have sent out automated "seed ships" to build shelters on barely-habitable planets that they have never actually visited, as a "Safety Net" for Explorers and Travellers, like a …
66
votes
16
answers
12k
views
An Earth-like planet is found in another solar system. What are the top priorities after lan...
Set in the not so distant future, we find a habitable planet very much like our own. The only downside is that it's around 500 years of travel with our current technological capabilities. …
66
votes
27
answers
16k
views
The land grows evil and corrupted ... but why?
Some parts remain normal and habitable.
Not too limited. There should be enough corruption to create at least one Mordor-ish region.
Long lasting. …
65
votes
Accepted
Plausible reason not to notice a planet
If the planet is habitable, it's likely low-mass and thus unlikely to produce strong radial velocity shifts in the motion of the star. … Non-transit methods wouldn't have revealed much about its habitability from an atmospheric perspective. …
64
votes
18
answers
11k
views
A city to last ten million years: Construction
To start off with, the inhabitants will have high technology; but the city should remain habitable if they regress to Iron Age or (possibly) Stone Age levels. … Edit: Mind-boggling though these timescales may be, the Earth is projected to remain habitable for about 1 billion years. …