All Questions
39 questions
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Is it possible to make a planet full of water and at the same time without life?
It's me again, I want to ask if it is possible to make a planet full of water but it has no life, the idea that it is a planet full of water with small islands in which there is no life, here is the ...
- 81
5
votes
3
answers
1k
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Could mountains form on anhydrous planets?
The primary mechanism for mountain formation (of which I'm aware) is uplift of the crust, with rivers eroding their way through softer sediments as the crust rises to form peaks and canyons. That ...
- 153
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11
answers
4k
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What could lead a large ocean on a planet's surface to recede completely only to reappear later on in a cyclical process?
I don't just mean tides or large-scale floods and droughts but a premise where one or more large bodies of water (or even every such body if that makes it easier) disappear, only to reappear one or ...
- 471
6
votes
3
answers
819
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Using asteroids for water
I have a planet that has no natural water bodies or sources. Is it feasible (assuming technology along the lines of the Earth Engines from "The Wandering Earth") to take asteroids from a ...
- 73
-1
votes
1
answer
77
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Hycean world space travel [closed]
Hycean worlds are planets which bridge the gap between rocky and gas giant planets. They have atmospheres high in hydrogen and vast oceans with perhaps no dry land at all. How could the local sentient ...
- 3,202
3
votes
6
answers
233
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sources of water for martian terraformers
The terraforming of Mars, assuming that the hurdle of establishing a magnetic field has already been jumped, now meets another problem: water. The planet has a pair of ice caps, but between them they ...
- 8,701
4
votes
7
answers
2k
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Habitable planet without oceans and with all rivers flowing towards the poles
The surface of this planet is about 3/4 the one of earth. It has no oceans or seas, its landscape defined by huge mountain ranges between 15 and 25km high. Most mountain ranges are latitudinal (N-S), ...
- 816
-2
votes
2
answers
334
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Would a solar flare hitting the earth cause rainfall? [closed]
If you have hydrogen gas, oxygen gas and heat together, it will trigger an (exotermic) reaction that produces water.
Earths atmosphere consists of around 21% oxygen.
Our sun is made mostly out of ...
- 173
1
vote
0
answers
94
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Weather patterns on a world with a homogenous distribution of land and ocean?
What would the weather patterns be like on an Earth with a more homogenous distribution of land and ocean? That is, keep the overall amount of water the same, the ratio of water to land the same (...
- 11
7
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3
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Is orangeish water possible on an alien planet with advanced life?
A planet little bigger than earth with slightly less gravity.
Colder than the earth, with longer days and shorter years. And water prevalence: 32% (23% surface water and 9% subterranean) and two moons....
- 457
0
votes
1
answer
183
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Can there be an ocean in a CO2 atmosphere?
See my first question here and other things about atmosphere: What would be the color of a CO2 atmosphere?
Hi so I have a planet with a CO2 atmosphere so can there be any ocean on this planet?
- 57
2
votes
1
answer
240
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What would the climate and ecosystems be like if instead of water, land would be 71% of Earth's surface?
According to the Bureau of Reclamation, water covers about 71% of the Earth's surface. Everything from microbes in the ocean releasing greenhouse gases into the air, to the immense amount of water ...
- 335
5
votes
2
answers
422
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A planet with a naturally occurring margarita-like ocean
I imagined a hypothetical planet named after Bacchus (a nickname given to Dionysus, the Greek god of wine, ecstasy, parties, theatre, drama, comedy, tragedy, and spiritual madness).
Its main ...
- 5,378
4
votes
4
answers
298
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What would an until-recently waterworld look like?
So, suppose a world that, for most of its biological history, was a water world, with minimal dry land. Starting from the Cambrian Explosion analogue, the world stays like this for roughly 460 million ...
- 5,807
6
votes
4
answers
472
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Would oceanic planet's water be drinkable?
According to Google, the sea is salty because the rainfall dissolves land minerals and salt, which then washes away to the oceans, and over billions of years that process raised the salinity of the ...
- 9,143
8
votes
5
answers
520
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Will water planets have ice caps?
Considering both full water worlds mostly out of water and ice, and rocky planets that just have a bit too much of it - would polar caps form on them if the conditions are roughly similar to modern ...
- 9,143
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3
answers
1k
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How big could a water planet be and not have an ice core?
I'm imagining an artificial planet of almost pure water constructed by an advanced aquatic species. It's "almost pure" because they included enough impurities in the water for life to thrive,...
- 351
3
votes
1
answer
192
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Earth like planet, more surface area under water?
Planet: earth like, half the radius of earth, gravity is .7g.
Assuming this is possible and humans live on this planet, would it be possible to have 90% of the planets surface area be under water? ...
- 105
25
votes
8
answers
5k
views
How could a planet have most of its water in the atmosphere?
I am creating a speculative evolution project for school (and partially for leisure) and I need a planet for my organisms to live on. I have a rough idea of what it may be like but I'm no expert in ...
- 1,548
11
votes
5
answers
2k
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What could trigger powerful quakes on icy world?
Imagine a planet orbiting a star some billions of lightyears away from us, the planet is 4 times the mass of Earth and is covered with ice 100km thick on average. It is believed that liquid ocean ...
- 48.1k
9
votes
4
answers
636
views
Water planet turns into desert world without being rendered uninhabitable
A habitable (human could survive in its atmosphere without suits) desert planet which used to have large oceans is quite common in ScFi. I was thinking about the processes which could have been ...
- 17.2k
4
votes
4
answers
1k
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Could a terrestrial planet have water for a core?
There’s a planet called eaglypt whose surface is 100% barren desert. However, there is a twist: the planet’s core consists of liquid water, and there are a few places where this water seeps through ...
- 6,042
6
votes
2
answers
274
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Maximum realistic salinity level with thriving aquatic environment?
I'm trying to create a planet which environment is not immediately lethal to humans, (reasonable oxygen level) however after closer inspection turns out not to be specially Earth-like.
One issues is ...
- 10.1k
5
votes
3
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198
views
A Worldwide Wave
What would have to happen for a giant tidal wave to wash its way around an entire planet? The planet can be like earth, with the same size, mass, and everything else. However the wave must start ...
- 1,118
6
votes
3
answers
268
views
Deep Sea Habitat on a Low Gravity Planet
I read somewhere that the lowest depth for a sustainable underwater habitat is estimated to be three-hundred meters. Any lower and the pressure becomes too great for structures that are currently ...
- 103
22
votes
5
answers
6k
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How could the rain fall slower?
I was thinking about people who once told me that I must feel the rain earlier than them (I'm tall). So I thought of a world where the rain falls so slowly that the humans of different size living on ...
- 466
6
votes
5
answers
1k
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Foam-like water
What can cause water to be foam-like, in lumps, but still liquid? Something similar to goo (jelly like but liquid and opaque)?
I have a planet and such kind of water, which is drinkable and the ...
- 767
16
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7
answers
5k
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What could cause the world to be almost completely submerged in water, naturally or man-made?
I'm trying to build a world that is almost completely water, but I couldn't come up with an explanation for WHY the world was like this. The world has the same gravity and atmosphere of Earth. It also ...
- 225
19
votes
4
answers
1k
views
Is it possible for a planet to have a liquid ring?
Is it possible for a planet to have a liquid ring rather than a ring made of solid particles?
If it is, how long would it be stable for? If not, is there any other configuration of a liquid that ...
- 38.4k
2
votes
2
answers
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water (like ours) vs. water-ammonia vs. ammonia planets - some questions
In a solar system much like ours, would there be the possibility of a planet of our size that would have lakes, rivers, oceans, etc. that would be composed of either a mixture of water and ammonia (...
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3
answers
3k
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A planet with all of its water underground
Question: Could a planet contain all of its (vast) oceans underground?
I imagined a planet with no surface oceans - and no water cycle above ground - but where life was still possible.
My initial ...
- 707
13
votes
6
answers
2k
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Liquid water on both sides of a tidally locked planet. Feasible?
I'm brainstorming for a rocky planet with similar mass to that of Earth's, orbiting a red dwarf star. It is tidally locked with no natural satellites, yet I'm bent on having liquid water on both sun-...
- 139
2
votes
3
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680
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What technology can create water on an airless, desert planet?
Planet has these characteristics:
Half of the planet is always on day, and other half is always night (it rotates at the same velocity as its orbit)
There are no underground water sources; it's all ...
- 2,693
0
votes
1
answer
183
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What if the Earth's oceans are added to Mars? [closed]
Imagine if all the water of the Earth's Oceans were added instantaneously to the Martian surface.
What wouldhappen in 10 mins? In 10 years? In 1000 years? In 1 billion years?
Would life form?
- 535
9
votes
6
answers
2k
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can a water cycle exist on a planet without oceans?
So there's a planet that is used as a farming world (food) for its system. This planet has a single, Mediterranean sea-sized ocean on it and lacks any other major surface oceans (he hasn't excluded ...
- 93
19
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7
answers
4k
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What's the quickest way to add oceans to a planet?
After writing this question about the ecology of a terraformed planet, I realized that I hadn't quite tied up all the loose ends of the terraforming process itself. I intended for a group of aliens ...
- 102k
8
votes
3
answers
921
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Could humans survive on a planet with only deuterium 'heavy water' made with hydrogen isotopes?
If all the fresh water were at least 25% deuterium, would humans be able to survive?
Would there be significant other detrimental side effects to human physiology as a result?
5
votes
2
answers
699
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Could an ocean planet reflect its watery textures onto earth?
Let's say there's an OCEAN planet smaller than Earth but larger than the Moon. The Sun lights on the ocean planet reflecting the water textures onto Earth.
Would it be possible to see watery ...
- 61
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4
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Is it possible to use Venus' temperature to generate electricity, and how would the electricity be transferred to Earth?
Assumptions:
We have materials that can withstand the temperatures/pressures/acidity of Venus.
We can get to Venus and back reasonably easily (NASA does shuttles every 3 months).
Here is Venus:
...
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