All Questions
Tagged with planets science-fiction
157 questions
-1
votes
1
answer
161
views
Would this "Wet Venus" in my timeline be possible?
I want to include an "Wet Venus" planet which will have both terran and venusian aspects in a major planetary system which exists in my timeline, though i've been wondering: Would it be ...
user119110
-1
votes
1
answer
133
views
How long would it take for an Earth-like planet to become uninhabitable if another sun suddenly appeared? [closed]
Context: this event is set in a world that I am going to call Earth-like enough. The only important distinction about this planet is that there is a cluster of floating islands held aloft by ancient ...
user115728
3
votes
3
answers
359
views
Biology of a Planet Sized Lifeform [closed]
This is also part of the sci-fi thing I'm working on, a planet sized lifeform.
The planet sized biological creature belongs to the "Ancestral Elves" species, and is also the capital planet ...
- 155
5
votes
2
answers
253
views
How would weather on a Cube-World with uniform surface gravity behave?
In a cube-world with uniform surface gravity with mildly rounded corners, how would weather behave? The Cube-world is roughly earth-sized, with the edges rounded by about a hundred kilometers. Gravity ...
- 473
5
votes
5
answers
1k
views
On a planet with 6 moons, how often would all 6 be full at the same time? [closed]
The cycles/orbital periods of the moons are 12, 20, 20, 24, 32, and 38 days. How often/after how many days would all 6 be full at once?
- 155
0
votes
1
answer
130
views
How would a monster be part of a planet's core? [closed]
Okay so I know this absolutely isn't possible but what is the most likely way this would be possible? This idea is also very much still in progress but I think asking this would help. I'm thinking of ...
- 11
3
votes
2
answers
1k
views
Can a cube-shaped(ish) world have uniform(ish) gravity when composed of ideal materials?
I'm trying to design a cube world while sticking somewhat closeish to real physics, but am not entirely sure about the physics involved with objects of non-uniform density, specifically as relates to ...
- 473
6
votes
6
answers
3k
views
How could Venus be partially terraformed?
In my setting, Venus is still very much still hostile to a normal human without equipment, but isn't hot enough to melt lead and has a relatively low pressure compared to now.
How could this ...
user73401
6
votes
6
answers
2k
views
Illuminating Minerva?
It would be convenient for both astrophysics and for the plot of the story set in this world if there exists a ninth planet in the Solar System far outside Pluto’s orbit (with appropriate mass, Ap, Pe,...
- 6,982
12
votes
9
answers
7k
views
Is it biologically possible for one species to need another species to reproduce?
I'm writing a speculative story about a planet in another Solar System. On this planet, there are five types of reproduction strategies amongst the sapient species. There are androgenic, gynogenics, ...
- 5,360
-1
votes
2
answers
245
views
What training would prepare you to colonize Alpha Centauri Cb?
It's 100 years in the future. 7 strategic, catastrophic bombs fell on Earth 55 years ago. Billions died. Countries, governments collapsed. Corporations rose, mega-companies who rule the world, ...
- 115
3
votes
2
answers
906
views
How would weather work on a planet with no rotation and constant sun on all sides?
A while ago I had an idea of a man made planet that consist of a thick, incredibly strong, outer crust, and at the core there is an antigravity/antimatter device that also produces consistent heat and ...
2
votes
3
answers
337
views
What would a planet where giant creatures live be like? (gravity, weather, etc.)
I am thinking about a planet on which gorilla-like people live in. Gorilla-shaped, walking on their knuckles, but with the capability of complex speech and a slightly more humanoid face (possessing a ...
- 37
4
votes
6
answers
3k
views
Is it possible to store the gravitational energy between planets somewhere in space? [closed]
Say I have a space station operating between Mars and earth. Can it somehow steal energy from
Mars- Earth
Earth - Sun
Sun - Mars
Combinations of gravitational pulls?
Would it distort he orbits?
- 59
12
votes
3
answers
4k
views
Could a planet orbiting a star have a habitable moon and this moon have its own moon orbiting it?
Could a star system exist where a body orbiting the star has an inhabited planet moon orbiting it instead of the sun? And the inhabited planet moon has its own smaller satellite.
I have very little ...
- 141
6
votes
5
answers
2k
views
What changes does physics require for a hollow earth?
Lets just assume I want a Hollow earth, similar to movies like the Monsterverse, etc, but without the plant/animal life. what changes does earth's structure or physics require for that?
Around the ...
- 173
3
votes
2
answers
338
views
Habitable zone of this red giant
I have a Red Giant star of about ~4.15 solar masses (a number I generated from what I found to be the average size of red giants).
My question for right now would be "What would be the habitable ...
user104078
2
votes
1
answer
99
views
What could cause a star system's protoplanetary disk to fragment more easily?
Essentially I'm looking to fill a star system with as many planetary bodies as I can, and I figure the larger the objects get, the more planets get crushed together or flung out of the system. There's ...
- 759
1
vote
1
answer
453
views
Is it possible for a race of alien humanoids to evolve a diet based of semen?
On this planet there are two species of alien humanoids creatures , one group evolved an omnivore based diet and the other has a semen based diet, both groups are bipedal and share a common ancestor.
...
user103236
0
votes
4
answers
280
views
Would it make more sense to terraform a planet with a single climate or multiple varieties of climate?
A human civilization in my story has terraformed hundreds, possibly thousands of planets across their galaxy to support life. They have done this by changing the atmospheres, adding minerals into the ...
- 1,871
2
votes
3
answers
711
views
Frozen Stars - Alternate sources of electricity
As in my previous question, I was talking about survival, when the parent star of a planet, Eridanus, froze due to some unknown cause. So the residents of this planet Taurus, the Villagers, have done ...
- 3,422
5
votes
2
answers
541
views
Is there a way for a Super-Earth have Earth-like Gravity?
I have a planet about 2 Earth Radii large, and even at a lighter Density this puts it squarely in the 10 Earth Mass Range and about 2.5g. It's about 90% ocean, has a thick atmosphere, and near ...
- 759
0
votes
2
answers
155
views
Can the mass of a rocky Super Giant be artificially reduced?
THE PREMISE:
Let's imagine a solar system with at least two rocky planets.
One is Earth sized "A" (or smaller) and the second is a Super Giant "B".
Both are in the habitable zone ...
- 11
3
votes
5
answers
401
views
Could it be possible to have a planet made of chunks of floating rock?
I've had an idea for several unique planets in my sci-fi fantasy world, perhaps the most unique is the capital of the alliance between several interstellar governments. The planet is made of thousands ...
- 31
3
votes
1
answer
132
views
How to build a gas giant?
In this universe, gravity wells are needed to enter and exit FTL, many cheap spacecraft are not armored enough to go near a star so gas giants are the next best option.
One particular solar system has ...
5
votes
3
answers
2k
views
White-hot tungsten moon emitting heat and light to make my world habitable
Never mind how the tungsten sphere formed. That's part of my pet projects, and I will deal with the question of how a nearly pure sphere of tungsten the diameter of the moon formed in space later.
So, ...
- 3,422
3
votes
1
answer
92
views
Could a passing comet's gravitational pull rotate a close-by smaller tidally locked planet 20 degrees?
In my story, I need a tidally locked planet to rotate about 20 degrees. I would like to write that the gravitational pull of a large Comet passing by (not hitting) the planet is strong enough to ...
- 31
0
votes
4
answers
378
views
Fire Planet as a light/heat source for my planets
So, basically, I was looking for a alternate light/heat source for my science-fiction novel which I am planning to write. I didn't rely on stars due to some reasons that I omitted from the original ...
- 3,422
3
votes
7
answers
380
views
Could a virus be used to terraform planets?
I came up with a society of insectoid aliens called Ebline, based on ants. Their class structure and stuff are very interesting, but their coolest tool is a virus called Cuulaziu. When they find a new ...
- 903
6
votes
4
answers
755
views
what planetary phenomenon could prevent accurate scans [closed]
I have a universe where space travel is common. A large group of settlers veered off course and crashed on a desert planet and have not yet been rescued for 50+ years and had to fight amongst ...
- 63
1
vote
1
answer
158
views
How strong would a planetary magnetic field need to be in order to lighten the weight of ferromagnetic metals? [closed]
I am writing a fantasy/sci-fi where humans crash-land on a somewhat earthlike planet (continental distribution, great masses of water, similar element's abundance), however, I would like for one of ...
- 21
4
votes
3
answers
898
views
Could a planet much larger than earth have the same gravity if it were hollow?
Now- this is probably a stupid question but hear me out.
If the planet I want to imagine were much larger than earth, would it have to have a massive difference in gravity?
It sounds extremely ...
- 87
2
votes
2
answers
1k
views
What would make an atmosphere green?
I am making a space sci-fi film. And the planet that it takes place on the sky is green (like how ours is blue). The air can be toxic but it need to be able to explode if oxygen is introduced in to it....
2
votes
2
answers
228
views
Saturnian Zeppelin Cities: can I use Aerographene coated with Titanium as the hull material to prevent getting crushed by atmospheric forces?
(After receiving countless suggestions from users like Sojourner, Wilik, and EngrStudent, I have come up with a solution to a cloud city on Saturn.)
So, I ran a few calculations on Air Density ...
- 3,422
0
votes
1
answer
63
views
Explaining My Planet’s Weather
Alright so my planet is very similar to Earth, but slightly more unstable. Both geologically and atmospherically speaking. It orbits an orange star, slightly larger and more “angry” than the sun. It ...
- 5,293
3
votes
4
answers
599
views
Day/Night on a Ringworld
In writing up an idea for living on a Ringworld, I've come to an odd question; Is there a moment of decreased exposure to the sun? I've seen this question asked previously, but people simply refuted ...
11
votes
4
answers
3k
views
Is there a way to generate energy using a planet's angular momentum?
The most common answer is "tidal forces" "wind" since all of these are by-products of the planet's Coriolis force.
Or there are rnd into generating energy from the earth's magnetic ...
- 461
3
votes
1
answer
117
views
What are the most important aspects of an environment that a drone would need to report for survivability?
Setting: You have an armada of intergalactic unmanned drones, whos sole purpose is to survey planets (or portions of planets) and report information about its survivability, and usefulness in ...
- 269
12
votes
16
answers
6k
views
Why would most species avoid democracy?
In my world, there are humans (often called Earthlings) and eight alien species.
Humans have an Earth government best described as a democratic quinquevirate: to be exact, this is an elective semi-...
- 5,372
2
votes
2
answers
215
views
How could earths life adapt on a new planet?
I have read the comments and thank you. I'm new to this website and I will continue to fix my mistakes until you people don't get confused.
The planets gravity is 10.8m/s^2. I've read some where that ...
- 37
9
votes
10
answers
2k
views
Why would humans build / send sample humanoid robots on an alien planet before humans arriving themselves?
Humans can send rovers and machines on other planets to navigate or to establish bases before human occupation begins. These rovers and machines are non-humanoid and suited to their mission roles. ...
- 597
2
votes
1
answer
135
views
What will be solar eclipse on a planet with two Suns, no moons and tidally locked to one sun?
An earth sized planet in the habitable zone between two stars has no moon (and even if it has, it is not significant to the story) and is tidally locked to star A but not star B. Can it still have a ...
- 597
2
votes
2
answers
191
views
Is it possible for an ammonia planet to have a desert spot? Like the great red spot on Jupiter. Or can an ammonia planet never have any hot spots?
I have an ammonia planet that I want to have a desert spot. A hot desert. Can I tidal lock the planet to it sun and let that particular portion be hot? Or is there any other way? Or is it never ...
- 597
3
votes
6
answers
169
views
How do I stop my near future city state from flying past a certain height and distance or sending up sats, but keep radio communications intact [closed]
A near future large city state is surrounded by a far more massive forest that is semi sentient. How do I stop them from sending up satellites, or sending up weather balloons high enough so that they ...
- 3,153
1
vote
2
answers
271
views
Is This Living Planet Plausible?
My idea is an planet that is one living organism wrapped all around an rocky foundation. It orbits an sun of one solar mass, and has an Earthlike radius. Its albedo is about 20%, so it gets 1098.4 W/m^...
- 2,380
6
votes
11
answers
3k
views
What would justify those road like structures
Working on a sci-fi project, similar to well known properties, in which real world road maps play a role, but need to justify them in world on a planet where people don't build on the surface.
I have ...
- 69
3
votes
2
answers
583
views
Maximum shell world planet size with earth-like conditions
I am trying to work out the theoretical limits on the size of a shell world (made with orbital rings constructed around a black hole). I have the following constraints:
The light to the planet must ...
- 151
9
votes
3
answers
1k
views
Mars sized planet with 83% Earth gravity?
For one of my stories I’ve developed a planet with approximately the same total surface area as Mars. This planet has high quantities of heavier metals/elements (especially silver) and it has roughly ...
- 367
12
votes
6
answers
2k
views
How to remove Saturn’s rings?
So oblate spheroid man is mad. One of his oblate spheroids has these nasty rings on it and he cannot watch it rotate in peace. So he dispatches Mr. Skeeble to get rid of them. Mr. Skeeble gets to ...
- 2,092
2
votes
1
answer
108
views
Feedback/help on planetary density?
I’m at a bit of a wall here. I have numbers for mass, radius, and gravity for my planet (Neogaea), but the density is escaping me.
Mass: 1.31 earth masses
Radius: 1.027 earth radius
Gravity: 1.25 ...
- 63