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Questions tagged [space-travel]

For questions about the process of traveling through space, including in orbit around a planet or moon. Consider also [spaceships]. See also the tag information (click "info") for more details on when this tag applies.

1
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4answers
153 views

Would using Magnetic Coil Platforms be an effective way to transport people across Solar Systems

QUESTION So recently I was doing research on Magnetic Coil based weaponry in the Halo universe, and while reading about how the "Super Mac" worked, I noticed that the theoretical speeds at which the ...
22
votes
8answers
6k views

Can urine be used for radiation shielding?

I'm looking to use water as a radiation shielding device, but do not want to waste space on my ship with waste and other water byproducts. Rather than just storing waste, I plan to use it as part of ...
4
votes
6answers
270 views

In a world where short-term space travel is common, what reason the government would have for banning long-term exploration?

In a sci-fi world where a planet has developed short space travels between the planet and its moons, what would be a good reason for the current form of government to not only disencourage, but ...
1
vote
1answer
226 views

What would a life form that evolved in deep space and without gravity look like? [closed]

Somehow the following hypothetical life form evolved in deep space with a long lifetime. It lives in a low orbit around massive stars, reproduces by eating interstellar gas and dust and uses the ...
13
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7answers
7k views

What's wrong with moving cables for a Space Elevator?

Ok, Space Elevators have fallen out of the limelight, sorry for them, but the concept is intriguing just the same, so here it goes. One of the worst problem space elevators face is the fact that they ...
9
votes
7answers
696 views

Star-devouring creature

What I am imagining is some sort of gargantuan beast that encloses a star with its monstrous jaws and then feeds off the rays released by the sun to power itself. I am curious what kind of creature ...
-1
votes
1answer
138 views

Is it really possible to push a solar sail with a laser on a cosmic scale? [closed]

One solution to interstellar space travel that I have heard popularised is to construct a ship with a solar sail and then use a laser to push it away. The advantages are obvious; you don't need to ...
5
votes
5answers
545 views

Could a torus shaped black hole exist?

I am interested in finding out if a black hole or mass on the verge of forming a black hole with enough spin could generate enough centrifugal force to change shape into a torus? Specifically I am ...
1
vote
2answers
127 views

Which asteroids are likely targets for a mining base?

So humanity has finally overcome the economic problems with asteroid mining, not to mention setting up colonies elsewhere in the solar system. Some are dragging the low-hanging fruit into near-Earth ...
2
votes
2answers
225 views

G-Forces and Cryo Sleep

So, normal humans can tolerate up to 4g of acceleration. If I had the tech to freeze and thaw people, would being frozen aid in tolerating high-g forces, or would the brittleness of your frozen ...
10
votes
5answers
3k views

What if gravity goes out while man is swimming in a pool on board of a spaceship? [duplicate]

Man is on board of a spaceship with enabled artificial gravity swimming in a pool. Due to a malfunction gravity goes out. Pool liquid tends to form a sphere with the man locked inside. Will it still ...
10
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3answers
530 views

Space Whales, how to survive?

We have escaped the galactic government, and now our greatest endeavour yet, life in space. How will these gargantuan space entities eat and survive in space? The whale or other in question is the ...
6
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2answers
352 views

Space Whales, how to move?

We have escaped the galactic government, and now our greatest endeavour yet, life in space. How shall these gargantuan space entities move and travel through space? The whale or other in question is ...
5
votes
1answer
243 views

What dangerous side effects might occur when using a bubble of spacetime to enter hyperspace? [closed]

I'm creating a fictional hyperspace to enable FTL travel. It's sort of a mix of Star Wars, Star Trek, Halo, and probably a bunch of other stuff. I've run into an aspect of it that either requires some ...
36
votes
11answers
5k views

How can a space station prevent docked ships from irradiating each other or the station?

I've been puzzling over the logistics of orbital spaceports, and this has been the one sticking point I keep coming to: radiation control between docked, or even neighboring, ships. Mass limitations ...
2
votes
6answers
393 views

How would a biologically advanced race without technology leave their planet?

I'm making an alien race that's kinda like the Tyranids. My problem right now is that they're starting out on a planet. How would they actually leave this planet using only their biological abilities? ...
1
vote
4answers
2k views

How many people could I transport on a spaceship? [closed]

I know that I want to transport 500,000 people to a fictional planet. Earth has had roughly 800 years to plan this evacuation. Reasonably speaking, if people were transported to a docking station, and ...
0
votes
5answers
275 views

How to abduct humans from a planet? [closed]

I'm trying to get some of my citizens abducted from a planet and return them later...alive! How do I do it? If the following is excluded: Beaming/teleportation - as it involves killing the ...
1
vote
2answers
231 views

Propulsion for destinations within the solar system that only takes hours (or less), not days, or months? [closed]

I'm looking for a pseudoscience, hand waving answer. I don't need fast travel to other stars, I just need something that can zip around within solar systems (even ones larger than our own). This would ...
5
votes
4answers
334 views

Space Age without Enlightenment?

The question of whether or not humans could reach space without various resources has been exhaustively researched on this site, but one question has not been touched- what about the social and ...
10
votes
5answers
528 views

Economic system to support Kessler Remediators, with maximum drama

After reading this question by Nick M (now closed) and exchanging some comments with him, I have some ideas related to the scenario. I realized that the comprehensive design covers several distinct ...
2
votes
1answer
179 views

Two-stage fusion propulsion [closed]

I am currently developing an interstellar mission layout for a science project and am starting the propulsion selection process. The main criterion of my mission is that it must be feasible with the ...
-3
votes
1answer
334 views

Dark energy/matter warp drive not to be confused with Negative matter drive [closed]

While researching about different possible space-drives for my sci-fi universe I came across a Warp Drive theory that makes use of Dark Energy and Dark Matter. At first I believed them to be similar ...
5
votes
6answers
254 views

How to defend against bad drivers and alien threats in a slower than light transportation scenario

You don't need to be traveling faster than the speed of light to encounter some pretty major problems. At just 30% the speed of light (90 Mm/s) a spaceship of mass 4 x 10^5 kg (about the mass of the ...
4
votes
2answers
190 views

Psychological and sociological effects of long-term solitude in space

Congratulations, you've finally earned your space pilot's license! The only problem is, you can't afford a large enough ship to house more than one person (considering food, breathable air, refuse ...
0
votes
0answers
83 views

A relatively relativity-safe FTL [duplicate]

Relativity is fun, but it does have some downsides. In practice, travelling near the speed of light makes you travel into the future, which is problematic. Relativity also doesn't seem to agree with ...
3
votes
2answers
296 views

Prolonging Life Through Rapid Travel (invoking Special Relativity)

My understanding of special relativity is that a clock that flies one lap around the earth then returns to its starting position measures less time than a clock that "stayed put" relative to the earth....
1
vote
3answers
736 views

What is necessary for a breathable artificial atmosphere?

For space travel: would you need to recreate earths air composition? Or could you just get by with the top 2 or 3 main components, i.e. either 78% nitrogen and 22% oxygen, or 78% nitrogen, 21% oxygen ...
3
votes
4answers
378 views

Why take over the galaxy? [closed]

Assuming that interstellar travel is possible but quite slow (slower than light) and expensive (in energy and resources) and that faster than light communication is not possible, what could motivate a ...
9
votes
7answers
2k views

Noticing visitors to our galaxy

Prelude Prelude TLDR; A fleet of ships is passing through our galaxy, stopping off at particular stars and causing small dips in the light from stars. This is related to a couple of other questions (...
3
votes
1answer
257 views

Alcubierre drives and intrasystem speed limits

I am working on a world (see this question) which I currently plan to have FTL via Alcubierre warp drive. I want to avoid the possibility of FTL sneak attacks so I plan on having something that ...
5
votes
10answers
2k views

What material to use for a near-future armoured spaceship?

In a setting with (mostly) near future technology what material would a top end naval spaceships hull be made out of? The hull must follow the following requirements: Able to withstand the strains ...
3
votes
3answers
293 views

How would mankind “tame” wormholes enough to use them for travel?

OK, so I’m writing a Star-Wars-esque science fiction book set some centuries in the future. Rather than break the laws of physics and say that faster-than-light travel is possible, I’ve chosen to give ...
14
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5answers
4k views

Colonizing a planet: how much food would we need to bring?

Assuming that the planet is 20 light years away (so back and forth trips would be impractical) we have no clue whether there is any edible life forms on the new planet hibernation (freezing/thawing ...
-1
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1answer
168 views

Artificial Gravity [closed]

What is a push field gravity generator? An interstellar vessel traveling at near light speed how would the crew in science fiction generate artificial gravity? Not using the typical rotation rings ...
2
votes
1answer
178 views

Can midcourse flip pose danger at relativistic speeds?

Consider an interstellar spaceship. It is a rather classical design, somewhat similar to the ISS Venture Star from Avatar: http://james-camerons-avatar.wikia.com/wiki/...
3
votes
2answers
227 views

In an elliptical orbit, where should a rocket fire its engines for maximum efficiency?

If a rocket ship with limited fuel has fallen into a decades-long elliptical orbit around the Sun, where in the orbit should it fire its engines in order to achieve escape velocity with a minimum of ...
30
votes
20answers
8k views

Two or more advanced civilizations aren't even aware of each other

Humans have achieved FTL and have colonized several planets in our greater stellar neighborhood. While we have discovered several planets that harbor life as we know it, we have not yet discovered ...
9
votes
2answers
198 views

Travel Delays due to the Expansion of the Universe

So, I know that the universe is expanding, and that that means that things are generally getting further apart as time goes on. What I'm having difficulty with, however, is figuring out just how much ...
4
votes
3answers
424 views

Will This Violate Causality?

Okay, so I have a sci-fi setting in which there is a form of FTL travel. Imagine the universe(all three/four dimensions of it) was stretched out onto the surface of a sphere. Now assume that there ...
4
votes
3answers
244 views

How to visualize orbits

There are spaceships. They have powerful and efficient engines, but not powerful and efficient enough to ignore gravity or delta V issues. Sometimes they battle each other in complex systems (like a ...
3
votes
1answer
164 views

Is there an effective difference between distances in 3d space and higher dimensional space

Note before I begin: I am aware that this might be a Math-heavy question that might be better suited for the math.se Goal: I'd like to use n-dimensional geometry as a method for effectively ...
4
votes
3answers
451 views

Start to terraform Venus [closed]

What is a possible way of making Venus more habitable by getting rid of at least some of the thick atmosphere and thereby lowering the pressure and heat. At this point all I can think of is some sort ...
23
votes
10answers
9k views

If FTL travel was invented tomorrow, would it change society? [closed]

Problem Movies like Interstellar or Star Trek would like to depict the ability to travel between stars, at speeds faster than light, as a technology which would revolutionize society and our everyday ...
4
votes
4answers
405 views

Assuming fuel and thrust generation are not issues, how quickly can a space-faring vessel travel without risking harm to the crew?

This question is really about best possible travel times between celestial bodies. In my current sci-fi setting, the Human race is spaceborne, but incapable of FTL travel. Their thrusters are ...
22
votes
6answers
3k views

How would a command structure and strategy for a galactic war be organized?

Background In a galaxy not so far far away.... The Andromeda galaxy is presided over by two major powers - the Y'Ing and the Y'Ang. These powers have existed together but never integrated with ...
6
votes
5answers
650 views

Realistic timeline for theocracy developing Alcubierre drive [closed]

Problem On Earth theocracies have been very reluctant to accept scientific progress, for instance the Catholic church, which dominated Medieval Europe, had a very hard time accepting Copernicus's, ...
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votes
4answers
497 views

The universe is erased, two humans wake up in a ship on its way to New Earth, their trip duration Is 100 years. How do they react and do they make it? [closed]

It is an ordinary day, people all over Earth are living their lives like it is any other. The hours and minutes go by, and then in a second everyone is gone. They are erased and it is like they never ...
5
votes
3answers
125 views

Effect of really long-distance cultural relations

For a story idea, I'm wondering about the effects that the discovery of another intelligent species without FTL travel would have. If we discovered another species much like ours, 50-100 light years ...
4
votes
2answers
767 views

Logically consistent FTL without time travel [duplicate]

If relativity holds, than faster-than-light travel would allow for time travel into the past. However, some claim that if all FTL travel used only one frame of reference, there could be no temporal ...