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Questions tagged [space]

For questions related to outer space, stellar systems, stars and other astronomical phenomena.

8
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4answers
2k views

Desert planet with forests at the poles

I'm thinking up a Mars or Venus type planet where the poles (or one pole) has a forest growing out of it due to a device that is used to make the planet more habitable by creating a oxygen friendly ...
2
votes
5answers
228 views

Would a superintelligent-AI prefer being based on Earth or on the Moon? [on hold]

Let's assume in a near future humanity and a superintelligent-AI (created by humans, but now independent) have a sort-of-friendly relationship, to exclude all military-related factors. Would the AI ...
4
votes
2answers
47 views

Stellar and magnetic parameters for creating polar radiation hazards

I've got a generally earthlike planet, but my goal is to make radiation exposure in the polar regions a much larger hazard than it is on Earth, while not being an issue in other regions. Nothing ...
0
votes
2answers
77 views

Effects of long term exposure to a non-earth like rich atmosphere

Imagine that humanity found a rocky planet with earth like gravity, atmospheric pressure, and temperature, orbiting a sun-like star. The only problem is that the planets atmosphere is that it is ...
42
votes
8answers
10k views

Is it harder for an intelligent octopus to live on land, or a human to live in space?

I have a race of octopodes with the same intelligence distribution as humans. I want them to “colonise” land to a similar extent as we have “colonised” space; have regular transport between the ocean ...
19
votes
11answers
7k views

If the SUN of our planet was the same size and proximity of the moon, would it still work as usual?

I'm building the world of my story for my comics and I've come to a bit of a standstill with a particular idea. Assuming there were no other planets in our universe, just a single planet Earth. The ...
7
votes
3answers
414 views

Practicality Of Orbital Fusion Reactors for Power

Much of the struggle with terrestrial fusion power seems to be with keeping the ultra-hot plasma contained. In a classic Tokamak configuration, magnets using massive amounts of power, suspend the ...
5
votes
1answer
61 views

How might an astronaut in a vacuum create an electrical field sufficient to affect a cloud of particulates?

My protagonist is in a sticky situation: floating in space (fortunately in a spacesuit) and about to be attacked by an alien avatar made from smart matter; tiny specks of dust which share a ...
4
votes
4answers
205 views

How long would it take a matter-antimatter GeV gamma ray laser photon rocket to get to Ross128b (11 light years away)?

I'm writing a colony story, and I want my ship to colonise Ross128b, which is 11 light years away from Earth. I need the characters to be alive when they get there, but it's okay if they've aged ...
4
votes
2answers
140 views

How much heat would a 1km asteroid release into earth's atmosphere?

I am writing a theory for a game that is in an apocalypse. An asteroid is heading for earth and will crash into the earth regardless in this theory. It is 1km in size but due to the YORP effect it has ...
18
votes
8answers
6k views

Is a red sea on a habitable world scientifically possible?

I have an idea that the seas of a world are red, not blue. However, the world should also be the birthplace of an intelligent alien species. Would it be scientifically possible to have a world with a ...
4
votes
9answers
308 views

Could this planet exist?

I've been thinking of a planet where the day/night cycle is way off to where there 30-35 hour long night period, while there are only near 8-4 hours of daylight. The local biological environment is ...
9
votes
5answers
673 views

What are ways a horned alien race could wear space helmets?

I've already considered that they may file their horns down, but keeping in mind that their horns gradually regrow, it is an inconvenient solution. This is what their horns typically look like: ...
16
votes
5answers
2k views

Would carbon-based lifeforms be able to eat silicon-based lifeforms?

In the South Galaxy, the overwhelming majority of life lives on planets, breathes air, and is carbon-based. All sentient life is carbon-based. However, in the vast reaches of space, there are some ...
2
votes
4answers
127 views

Day/night cycle science help?

So I am building a world but need help with its day/night cycle and the science to make it work. The planet has a 32 hours day cycle, however there is only 10 hours of light a day. This planet is ...
0
votes
2answers
92 views

Use for a giant in a space military?

In this story I am writing, I am trying to figure out a place for a giant race in a military for a galaxy-spanning civilization. We'll call them Meat Boys, for joke sake and namesake. ...
5
votes
6answers
180 views

Is it possible to “Smell” in Space? Viable Equivalents?

I am currently creating a Spacefaring Race that regularly travels between planetary systems in order to harvest resources, but due to the fact that the conditions required for them to Breed are fairly ...
40
votes
32answers
10k views

Why would a previously spacefaring civilization become unable to build another interstellar ship?

I'm writing a story in which a civilization previously capable of (firmly technobabble-based) FTL travel has become stranded, orbiting an isolated star with no rocky planets. (There was a planet, but ...
2
votes
2answers
106 views

Artificial satellite in a Binary Star System

Is it possible for an artificial satellite (in this case, an unmanned communications platform) to maintain a stable orbit directly around the barycenter of a Binary Star system, as in well inside the ...
59
votes
24answers
12k views

How could a planet have a sky without stars at night?

Is it possible for a planet in our part of the galaxy to have a night without stars? I'm looking for some kind of natural phenomena that would hide the stars, but allow the sun to rise and fall as ...
9
votes
6answers
3k views

Would this design be useful for surviving relativistic impacts?

Let's say that I've developed a new engine that can accelerate at 1G continuously. Within about a year, I'm nearing the speed of light. Naturally, I recognize the danger of collisions with gas and ...
6
votes
1answer
334 views

Does my plot point centered around eclipses make sense?

My main antagonist is an infant Great One that's been imprisoned below the Moon's surface and I want its influence and physical form to have a weakness to direct sunlight which, I think, gives me a ...
2
votes
4answers
138 views

How can a wealthy and enlightened minority manage to create colonies on Mars and cheapen space mining in a world of mysticism?

Key setting elements and questions: In this scenario, A large majority of the population: Supports spending more money on religion than on the space colonization program. They are middle class: ...
-1
votes
3answers
132 views

Storing people in space

In the future, personal Cryonics (in the hope of cure or immortality on re-awakening)) have become enormously popular. However there is a storage problem. There just isn't enough space for all the ...
0
votes
1answer
76 views

Can I use another calendar in a Space Opera? [closed]

I'm creating a space opera (or a soft science fiction in space) universe, but I am trying to devise a calendar and I don't know if I should use the calendar of Earth (using the time before and after ...
5
votes
3answers
113 views

emergency spacesuits

I know a similar question was asked whether gas masks could be used to survive in space but it didn't quite focus on the parts I'm interested in. I'm building a world in which space travel is regular ...
10
votes
2answers
931 views

What sort of acceleration would I need for my space ship to reach Eris in 3 months

I have been working on a sci-fi story for a little while now, and have recently discovered that I made a very big error in assuming the position of Eris. The main issue is that I had forgotten to take ...
6
votes
2answers
302 views

How far out can a pre-telescope human society (naked eye observations only) detect planets?

There are many questions on WBSE that cover most aspects of building a planetary system. (some examples below): Creating a realistic world(s) map - planetary systems How many planets should I have ...
7
votes
5answers
613 views

What kind of “space force” would be needed to protect space assets in the near future?

Premise Even at present day, space assets are very valuable: Our space assets, day by day, are growing by leaps and bounds. It's the value of that satellite to the economy. - Neil deGrasse ...
2
votes
1answer
98 views

Would a GUT-monopole powered rocket be feasible?

Would a rocket or Bussard ramjet powered by monopole induced proton decay (Callan-Rubakov mechanism) be a feasible method for near-light interstellar flight? There are such drives in the Orion's Arm ...
11
votes
5answers
277 views

Fastest way to oxygenate Venus

Scientists recently discovered a propellantless drive capable of completely negating gravity with low energy inputs! Huzzah! Sadly the Earth is going to be destroyed soon by a rogue handwave. Looking ...
7
votes
2answers
165 views

Can I arrange my stars in a tetrahedron?

Inspired by this question: Consider a trinary star system, in which the three stars are arranged in an xy plane and all revolving the same direction, equidistant from each other. The inward pull of ...
2
votes
3answers
151 views

Artificial gravity of spinning sphere

I have a colonized asteroid that is roughly spherical and has been hollowed out. To create artificial gravity I spin the asteroid creating a strip of 1g gravity around the "equator". What would happen ...
-4
votes
1answer
114 views

How to create matter in a solar system [closed]

I looked to see if anything like this was asked, but can’t find. So a star is formed, the sun for instance., and creates a gravitational force on its own. After a billion years a kuiper belt ...
2
votes
3answers
198 views

Could a gas giant have two earth sized moons in binary orbit around it

I’m trying to create a system where a gas giant has two moons in binary orbit with each other. I’m trying to get that James Cameron look with the gas giant on the horizon, but also have a equally ...
5
votes
1answer
107 views

Explaining a Low-Mass Brown Dwarf

Considering the well-established relationships between stellar mass, surface temp, and luminosity, how unusual would it be to find a star (or brown dwarf) that possesses about half the mass of an ...
2
votes
1answer
56 views

apply forces such that satellite reaches a given point in space

The problem is the following: let's say we have a miniaturized satellite*, X; we know its position, velocity, acceleration, the forces applied at any given moment; we also know its mass, its ...
19
votes
3answers
796 views

Could an astronaut manually land a reentry vessel in a specific location without any help from ground control or satellites or anything? [closed]

So, let's say an astronaut has crashed his shuttle into earth only to find that there are no cities or any signs of human-made objects left on earth. Another astronaut is orbiting earth in her space ...
4
votes
2answers
129 views

Equation to get the size of a crater created by a meteor strike?

Im trying to find the equation to the the size of the resulting crater created by meteor strike when I have the mass, volume, diameter, density, velocity and kinetic energy of the meteor Can ...
-1
votes
0answers
50 views

Universal Intergalactic Currency [duplicate]

This might be totally opinion based but I really need all the help I can get because I have serious writers block. I’m writing a story where the world is vastly advanced, set in the 24th century and ...
6
votes
2answers
2k views

Are garbage moons possible?

The civilization in question here has colonized the solar system. They have established settlements on most solid planets. Of course, a space-faring people generates plenty of trash, but they have a ...
70
votes
35answers
14k views

Eternal space battle around a planet. But why? [closed]

The Setting A planet (large continents, mostly steppes, deserts and plains) is settled by nomadic tribes (think Mongols, Tuareg or Apache). The tribes lack written history, but the legends speak of a ...
3
votes
2answers
185 views

Anatomically Correct Space Whales? [duplicate]

In my book series, I want space whales to be a thing. However, I want to have some kind of at least pseudo-scientific explanation for their existence. What I need to know is: -How do they breathe in ...
12
votes
2answers
626 views

Anatomically Correct: Space Plankton

This creature was void-born in the farthest depths of time in this Universe. Drawing its energy from electromagnetic radiation, and sealed against the vacuum of space, this drifting creature ...
-1
votes
3answers
121 views

What could damage my AI character? [closed]

So I'm writing a video game similar to Rez and in this game a self-aware female AI running a spaceship gets her emotions fried (even though her shielding is powerful and emotions are firewalled and ...
16
votes
8answers
2k views

Martial arts in zero or low gravity [duplicate]

How would your design a martial art for use in either zero gravity (in space) or lower gravity (on another planet or moon)? Constraints: A practical martial art, for real world use, not a sport or ...
-1
votes
1answer
81 views

Estimates for undetectable planets in extra-solar systems [closed]

Based on answers and comments on some previous questions (especially this one), and as very clearly illustrated by the scatter-plot here, there are some very definite limitations on our ability to ...
8
votes
6answers
1k views

Can a 15km, rapidly-spining asteroid go undiscovered until the asteroid belt is being actively explored?

What I want to know is if an asteroid about 15 KM in diameter and roughly double that in length, spinning at a significant speed, could go undiscovered until a crew of an asteroid mining ship happened ...
2
votes
3answers
204 views

Where to have a colony after Pluto?

I have a world where humans have developed interplanetary space travel that allow them to travel to other planets. There is an issue though- the speed is slow, sublight; as an example it will take at ...
7
votes
1answer
200 views

How close can a ship get to Sagittarius A?

Assuming that the only fancy available technology is FTL drives (to get there) plus anything needed to protect and sustain a crew during the journey from Earth to Sagittarius A (whether it takes a few ...