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Q&A

Posts tagged space

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Q&A If you melted Europa's ice would there be any land?

First question: if you melted Europa's ice, would there be any land? Second question (assuming the answer to the first question is no), how much water would you have to remove after that in order ...

3 answers  ·  posted 4y ago by levininja‭  ·  last activity 4y ago by levininja‭

Question space moons geology
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Q&A What could cause the majority of people to live in space habitats?

So I'm thinking here about the sort of setting like Eclipse Phase, in which virtually all of humanity lives in a wide range of space habitats because of an apocalypse on Earth. I am imagining a var...

3 answers  ·  posted 4y ago by Adam Reynolds‭  ·  last activity 4y ago by Adam Reynolds‭

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Q&A What is a good reason not to mine a planetary ring?

Most planetary rings are rich in water in the form of ice, especially now we are running low on freshwater reserves on Earth. Imagine someone discovered a huge chunk of meteorite consisting of a wh...

6 answers  ·  posted 4y ago by user6760‭  ·  last activity 4y ago by user6760‭

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Q&A Artificial lighting for a closed O'Neill cylinder

I am struggling to picture what placement of artificial lighting I should use for my O'Neill cylinder design for the daylight hours, a strip light along the centre of the cylinder would obstruct th...

6 answers  ·  posted 4y ago by RandySavage‭  ·  last activity 4y ago by RandySavage‭

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Q&A Could an advanced alien race prevent the death of the universe?

We all know that the universe is going to die one day: all the stars will die, all the black holes will evaporate and life will be gone. But hypothetically speaking, if a super advanced alien race ...

22 answers  ·  posted 5y ago by John Michailidis‭  ·  last activity 4y ago by John Michailidis‭

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Q&A Formula for send and response times of messages at fraction of light speed?

I have a ship that begins the equation traveling at 50 percent the speed of light, but decelerating constantly to finally land on a certain planet (towards which it is moving the entire time). It b...

2 answers  ·  posted 4y ago by Jesse Tate‭  ·  last activity 4y ago by Jesse Tate‭

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Q&A How fast would a civilization with FTL spread out?

Let's say that a civilization has access to FTL. Let's say it is instantaneous so travel time between solar systems isn't a factor. How long would it take for them to spread out from their home sol...

10 answers  ·  posted 4y ago by Jonas‭  ·  last activity 4y ago by Jonas‭

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Q&A Avian adaptation to microgravity and low gravity environments

I like to hear the sound of birds when I travel amongst my orbital and planetary habitats scattered around the outer system. Most of these settlements are very densely populated - what you might ...

3 answers  ·  posted 5y ago by Chairman Yang‭  ·  last activity 4y ago by Chairman Yang‭

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Rigorous Science Can someone with a better understanding of physics review or correct my design of a hypothetical fusion reactor for space vessels?

I have a layman's (re: not very good) understanding of nuclear physics, and it's pretty cool to me, but I'm quite bad at math. I'm working on a sci-fi book (classic, I know) and just finished a dra...

2 answers  ·  posted 4y ago by Nepty‭  ·  last activity 4y ago by Nepty‭

Question space fusion
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Q&A Manufacturing a new propulsion method mid journey

I have an interstellar ship going from earth to a nearby star system using current technology and chemical fuel. The ship has been created and is being managed by a self sufficient android. The an...

2 answers  ·  posted 4y ago by RandySavage‭  ·  last activity 4y ago by RandySavage‭

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Q&A Adverse effects of reduced food variety on microbiome

We often see, in Sci-fi, food being produced from, say, algae or yeast. What could be the effect of such a limited diet on the gut microbiome? Would there be any believable side-effect that would h...

3 answers  ·  posted 4y ago by Marc‭  ·  last activity 4y ago by Marc‭

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Q&A What color is a space elevator?

Consider a space elevator, a thread hanging from the heavens and being anchored to a spot in ground or sea barge at equator. As I understand it, it'd be very thin at ground and get thicker on the w...

8 answers  ·  posted 7y ago by hyde‭  ·  last activity 4y ago by hyde‭

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Q&A Spin gravity on an abandoned ship

If a cylindrical rocket ship with a diameter of about 350 meters were spinning on its long axis, would more than just the interior surface of the outer hull have artificial gravity? The ships dec...

1 answer  ·  posted 4y ago by carsonogen089‭  ·  last activity 4y ago by carsonogen089‭

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Q&A Can a human colony survive on a 'hot' world?

A colony ship headed for its new home countless light-years from Earth suffers an unfortunate malfunction on the final part of its descent phase and crashes onto the planet. Thankfully, the ship cr...

11 answers  ·  posted 4y ago by Raznarok‭  ·  last activity 4y ago by Raznarok‭

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Q&A Ways for advanced civilizations to mask communications on an interstellar / intergalactic scale

Say we have a civilization on the verge of becoming Type II, and are in the process of building a Dyson Sphere. They are aware that in the process, and especially after completion, there will be te...

3 answers  ·  posted 4y ago by SapphireFlame‭  ·  last activity 4y ago by SapphireFlame‭

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Q&A How could a skyhook stay in orbit with no human involvement for thousands of years

In the story I'm writing, three humans with stone-age technology and no knowledge of space accidentally awaken thousands of cryogenically preserved humans. These humans immediately get to work on...

4 answers  ·  posted 4y ago by John Lewis‭  ·  last activity 4y ago by John Lewis‭

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Q&A Transporting radioactive fuels

Imagine a light spaceship capable of traveling at 0.999c is tasked to tow a radioactive cargo containing millions of tons of polonium and radium, however the container holding the radioactive mater...

4 answers  ·  posted 4y ago by user6760‭  ·  last activity 4y ago by user6760‭

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Q&A How to get time to pass faster on another planet compared to earth?

I'm developing a story where humans colonize a few planets. One planet, lets call it Planet A, has similar gravity to earth, air pressure, and solar radiation. You cannot however, walk on the surf...

3 answers  ·  posted 4y ago by whn‭  ·  last activity 4y ago by whn‭

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Q&A Why is dwarfism considered an advantage for jobs in space?

First, a clarification: Dwarfism is the umbrella term for 200+ medical conditions that result in short stature. Since this is Worldbuilding, my question refers to human beings with genetic dwarfis...

6 answers  ·  posted 4y ago by wetcircuit‭  ·  last activity 4y ago by wetcircuit‭

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Q&A Feasibility of a 2nd, geosynchronous moon

In my world, there are 3 astrological bodies of significance, the sun, the moon, and a 3rd, geostationary object, believed to be the home of the gods. I want all three of them to have roughly the s...

2 answers  ·  posted 4y ago by Umbra‭  ·  last activity 4y ago by Umbra‭

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Q&A How large of a moon could an earthlike planet possess

Suppose I want to have a moon with more gravity than ours how large of a moon can I have and what effects would there be.

3 answers  ·  posted 4y ago by YLong‭  ·  last activity 4y ago by YLong‭

Question space planets
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Q&A How fast do we spin this for 'One g'

Following on from this question. Question Context : Mars second moon Deimos has been converted into a generation ship. A considerable portion of its mass has been shaved off during the process &...

1 answer  ·  posted 4y ago by Pelinore‭  ·  last activity 4y ago by Pelinore‭

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Q&A How many people can a sealed 3x1x1 km biome support?

Question Context : Mars second moon Deimos has been converted into a generation ship. A considerable portion of its mass has been shaved off during the process & ejected backwards along its p...

1 answer  ·  posted 4y ago by Pelinore‭  ·  last activity 4y ago by Pelinore‭

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Q&A Can a planet's artificial ring always face the sun?

A habitat/space harbor ring encircles an ice giant crossing both poles (polar orbit) and rotating to create artificial gravity. Can the ring also precess in synchronization with the planet's year,...

1 answer  ·  posted 4y ago by wetcircuit‭  ·  last activity 4y ago by wetcircuit‭

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Q&A Long range laser using wormholes

So, I was recently watching Stargate: Atlantis, and I saw a very interesting concept. In one episode, the villainous Replicators use the stargate network to fire what is essentially a high-powered ...

2 answers  ·  posted 4y ago by SE is too politically correct‭  ·  last activity 4y ago by SE is too politically correct‭

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Q&A Why would Earth be long-term unsuitable for an advanced alien species that's already colonized it?

I'm writing a story where aliens are using humanity like a botnet to do hyper complex calculations - each infested human has a program running in their subconscious brain that does a small part of ...

25 answers  ·  posted 4y ago by crass_sandwich‭  ·  last activity 4y ago by crass_sandwich‭

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Q&A How to resolve the transporter conundrum in a FTL spaceship?

Imagine a spaceship capable of achieving faster than light travel uses several transporters to allow crew members to move around its interior at the constant speed of light. What happens to the cre...

5 answers  ·  posted 4y ago by user6760‭  ·  last activity 4y ago by user6760‭

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Q&A What would come first, the colonization of the solar system or interstellar colonization?

I have a world (around 3000-3500ad) where human race is spread across various planetary systems - so interstellar travel it's possible. The interstellar travel is possible via a Bussard Ramjet whi...

13 answers  ·  posted 7y ago by Radu Rojas‭  ·  last activity 4y ago by Radu Rojas‭

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Q&A Night sky when man-made light sources are made obsolete. Would the night sky still be affected by light-pollution?

Im creating a world where for whatever reason all power on Earth is gone. Meaning there is no more man-made light. Which also means no more light pollution. Would the night sky revert to its former...

3 answers  ·  posted 4y ago by Rose‭  ·  last activity 4y ago by Rose‭

Question space technology
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Q&A How to avoid objects when traveling at greater than .75 light speed. or How Not to Go SPLAT?

After asking my question about seeing black holes in your path between the stars, I also wondered abut other more mundane objects. Black holes affect large areas of space so even if you didn't get...

13 answers  ·  posted 9y ago by bowlturner‭  ·  last activity 4y ago by bowlturner‭

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Q&A In a decadent galactic empire with instantaneous communication, how would the most remote planet gain their independence?

In a very large and decadent galactic empire (think of Asimov's foundation empire), a new technology leap allows planet's government bodies to communicate instantaneously across the galaxy. It can ...

9 answers  ·  posted 4y ago by AllirionX‭  ·  last activity 4y ago by AllirionX‭

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Q&A How many satellites would we have to launch to create an artificial set of rings around Earth

Saturn has rings of debris which orbit it, and it is possible to get a satellite into an orbit that will at least last a few years, so my question is as follows; How many satellites (or just the pu...

1 answer  ·  posted 4y ago by Bob Kerman‭  ·  last activity 4y ago by Bob Kerman‭

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Q&A Simple non destructive spaceship liftoff engine

I like to have a concept of an engine that spaceships can use to lift off (and land) from/on a planet (regardless of it having an atmosphere or not) with the following constraints: It should be s...

20 answers  ·  posted 7y ago by Hothie‭  ·  last activity 4y ago by Hothie‭

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Q&A What could a self-sustaining lunar colony slowly lose that would ultimately prove fatal?

I've got a lunar colony that was set up to be self-sustaining before a collapse of life on Earth. The colony has survived on its own for several thousand years through a period of technological reg...

20 answers  ·  posted 5y ago by aaronius‭  ·  last activity 4y ago by aaronius‭

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Q&A Properties of a new engine

In my story, I need a spaceplane, that is, a shuttle which can fly in an atmosphere as well as in space. It needs to be able to land from space, and then take off and go to space without refuelling...

4 answers  ·  posted 4y ago by Alex‭  ·  last activity 4y ago by Alex‭

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Q&A How to create 'visible' space-laser-like weapons

Goal: Just imaging a Star Wars X-Wing fight, and you've got the idea. However, I want to know whether something like that is possible without tons of metaphysical hand-waiving and 'just because'. ...

6 answers  ·  posted 8y ago by subrunner‭  ·  last activity 4y ago by subrunner‭

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Q&A Capital ship reactor power

I'm trying to not delve too into the sciences so as to keep things fairly suitable for a space opera setting, but I'm trying to figure a few things to a reasonable degree of detail. My question he...

5 answers  ·  posted 4y ago by Amon‭  ·  last activity 4y ago by Amon‭

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Q&A Can tiny astronauts reach space?

Imagine a species one foot tall that has a relatively large brain for its size. The species has human like intelligence and in principle the ability to build anything that we could. It lives on a w...

2 answers  ·  posted 4y ago by Slarty‭  ·  last activity 4y ago by Slarty‭

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Q&A How much sunlight can I get into my O'Neill cylinder and how much light needs to be artificial?

The cylinder is 32 km long in total, 8 km in diameter, with 3km long endcaps, resulting in a habital area with a length of 26 km (= and an area of cirka 754 km2). The main body of the cylinder is...

1 answer  ·  posted 4y ago by Backup Plan‭  ·  last activity 4y ago by Backup Plan‭

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Q&A Avoiding Violation of Causality with Stable Wormholes

In laying out the groundwork for a series of stories I'd like to write, I'm positing a somewhat modernly-realistic take on the "well-aged human empire in the stars" type of setting the classic auth...

4 answers  ·  posted 7y ago by Cereza‭  ·  last activity 4y ago by Cereza‭

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Q&A Creating Fictional Slavic Place Names

I have a very simple question regarding a small problem I cannot find a single satisfying answer to. I am trying to create a country with a prominent Slavic culture. In my story, an alien world has...

11 answers  ·  posted 5y ago by Noah‭  ·  last activity 4y ago by Noah‭

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Q&A A supercomputer around the sun

I wish to build a sort of Dyson swarm around the sun. Not to transmit energy, but to put supercomputers in each satellite so they can calculate spatial trajectories. The main idea of the project i...

3 answers  ·  posted 7y ago by PatJ‭  ·  last activity 4y ago by PatJ‭

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Q&A Flash-heating spaceships

I'm working on a version of wormhole-based FTL travel, and one of the side effects of passing through the wormhole is going to be instantaneous heating of every molecule of the thing passing throug...

2 answers  ·  posted 4y ago by Gryphon‭  ·  last activity 4y ago by Gryphon‭

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Q&A Would ablation be an effective way to redirect objects in space?

So I'm writing a story set in the close(ish) future(say 2130), and space debris is starting to be a real problem. Stations in orbit are constantly having to maneuver out of the paths of orbital deb...

2 answers  ·  posted 8y ago by Jetscooters‭  ·  last activity 4y ago by Jetscooters‭

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Q&A Could burning debris keep burning in space?

To have a fire you need three things: oxygen, heat and flammable material, therefore the cold vacuum of space is the last place you would expect something to burn. I was, however, wondering if a ve...

6 answers  ·  posted 7y ago by Nikolaj‭  ·  last activity 4y ago by Nikolaj‭

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Q&A Space station debris

What happens to small pieces of debris left floating around inside a derelict space station? My space station had 100 people aboard, and due to sabotage, it decompressed and was abandoned. Inside...

3 answers  ·  posted 6y ago by Innovine‭  ·  last activity 4y ago by Innovine‭

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Q&A Blocking sunlight using space debris

Can large amount space debris be used to block sunlight from falling in a particular land area (about the size of Hawaiian islands)? If so, how much space debris will be required? What will be the ...

4 answers  ·  posted 9y ago by user93‭  ·  last activity 4y ago by user93‭

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Q&A What's a safer design for a relativistic kill vehicle?

A large railgun mounted on the spine of a mega-scale starship (20-32km) or an antimatter-powered missile launched outside the ship? For clarification's sake, when I say "safer" I'm referring to "sa...

5 answers  ·  posted 7y ago by Z.Schroeder‭  ·  last activity 4y ago by Z.Schroeder‭

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Q&A How do spaceship-mounted railguns not destroy the ships firing them?

And I'm not talking about the wimpy 32"‰MJ kind we have in the real world, I'm talking about the superweapon kind. Anyone familiar with Knights of Sidonia and their flagship's Heavy Mass Cannons wi...

11 answers  ·  posted 7y ago by Z.Schroeder‭  ·  last activity 4y ago by Z.Schroeder‭

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Q&A Feasibility of coilgun system for sub-luminar interplanetary transport

My story is set within one solar system, which can be assumed to have a similar composition to that of our own: one Class G star, a handful of rocky inner planets and a handful of gas giants on the...

11 answers  ·  posted 6y ago by enpaul‭  ·  last activity 4y ago by enpaul‭