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.

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Could harvesting antimatter from a Gas giant's van Allen Belts be feasible?

Could a sufficiently advanced civilization feasibly harvest antimatter from the van allen belts of a gas giant and use it for fast interplanetary travel. The main idea stemmed from this video, among ...
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6 votes
2 answers
222 views

Safe Alcubierre drive

I want my world to have an Alcubierre drive for slower-than-light-travel. One third the speed of light will do. Since there is no FTL we don't have to worry about causality paradoxes. However the ...
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5 votes
10 answers
711 views

How to Sneak Von Neumann Probes Past the Enemy?

150 years into the future, a space faction is in a confrontation with a stronger rival. Our faction is a Kardashev Type I civilization and has a similar technological level to its rival, but the rival ...
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5 votes
4 answers
184 views

How would time logically be measured on a massive starship in perpetual flight?

So, say I'm writing this story that takes place on a giant starship travelling from galaxy to galaxy (delivering goods or something like that). This ship was created and inhabited by one race ...
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21 votes
17 answers
3k views

FTL gates and drives used simultaneously without redundancy?

This world has 3 forms of faster-than-light travel: Warpdrives don't require destination coordinates. They can be activated and deactivated at any time to move continuously through space. But they ...
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8 votes
7 answers
556 views

Social status by fuel used?

In this universe contained self sustaining fusion has been achieved. As we know the fuel for fusion is most commonly isotopes of hydrogen, and helium is produced as a byproduct of that. Helium is, as ...
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5 votes
9 answers
1k views

How would Utility fog grey goo travel through space?

An advanced alien species in my story created smart matter similar to utility fog, nanobots with extendable arms which link to form programmed structures. When the species moves to new locations a ...
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4 votes
0 answers
62 views

How would a "plasma torus", generated from Phobos to create a magnetosphere, look from the surface of Mars? How would it work?

One theory for how to create a magnetosphere around Mars is to generate a plasma torus by "evaporating matter from Phobos or Deimos, ionizing it and using electromagnetic current drive techniques ...
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17 votes
7 answers
4k views

A better way to do a planetary invasion?

Planetary invasions are usually depicted using drop-ships which come straight down from the sky. Pretty much armoured Apollo Era capsules. These can be bigger, for example Warhammer40k has company ...
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4 votes
6 answers
258 views

Reaching Proxima Centauri within 10 years of ship time in the year 2300

For scenaristic reasons, my colonization spaceship needs to reach Proxima Centauri within 10 years of ship time. How do they do that? I'm starting to get a headache over this. At first I thought the ...
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0 votes
4 answers
190 views

What would a spaceship look like if our design aesthetic had not changed since 1890? [closed]

I am struggling to visualize the space battleships of a human civilization which made it into space in the mid 1800s and have progressed to a level of technological development similar to that ...
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24 votes
20 answers
5k views

After we drain the Sun and migrate, why would humanity find the Solar System important?

Long ago, our ancestors worked out how to travel faster than light: by sending craft directly into the Sun, employing fusion, quantum entanglement, and a healthy dose of handwavium/science ...
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6 votes
3 answers
1k views

Is it possible, at least in theory, to travel between two spots in the universe through an Einstein-Rosen bridge?

I'm using as a means of "long-distance travel" the generation and exploitation of Einstein-Rosen bridges, through quantum entanglement of black matter in different points of the galaxy, as a ...
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3 votes
1 answer
120 views

How fast would strangelets travel in space?

At what speed would strange matter travel in space after being ejected from a neutron star merger? I have searched around online but I have not found an answer.
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5 votes
2 answers
141 views

Is it radio silence between 2 Alcubierre drives?

Suppose we grant a 1 time scientific miracle for exotic matter to power Alcubierra wrap drive, then could two such drives communicate with each other? The drive discharges exotic matter particles ...
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10 votes
3 answers
1k views

Fusion drive in a spaceship: What would the damage be if such a ship were to be attacked?

I've recently read some news about progress in building plasma reactors. The technology is basically that plasma is held by magnet field because otherwise, it would melt everything it touches. It has ...
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7 votes
1 answer
111 views

Figuring out the precise location of Earth a certain amount of time ago

Movement is relative, but I've read that an ex-NASA scientist has quantified the speed of Earth hurtling through space to be 1.3 million mph, using the Cosmic Microwave Background as a frame of ...
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4 votes
2 answers
179 views

Lightspeed travel survivability [closed]

In my sci fi novel, a technologically advanced version of the human race is capable of harnessing and creating large amounts of antimatter for interstellar travel at 99% the speed of light , ...
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  • 314
6 votes
2 answers
122 views

Is it possible to somehow create a field where time dilation works in the opposite way and use it to create an interstellar highway?

I want to make my world as realistic as possible, so no otherworldly FTL ideas like wormholes, teleportation or warp/alcubierre drives that will violate causality according to relativity. Let's begin. ...
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  • 111
3 votes
3 answers
182 views

Zero propellant interplanetary travel [closed]

I am creating a world where there is an interplanetary network that allows planetary commuting to and from all planets and major moons in the solar system with 0 propulsion being supplied by the craft ...
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  • 314
0 votes
0 answers
101 views

What things should I consider about TITAN while Landing, in terms of geography?

What are the challenges to landing on Saturn's moon, Titan, with respect to atmosphere and geography? Consider we are landing a team of scientists, in a ship based geometrically on the Jupiter of Lost ...
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  • 109
5 votes
11 answers
424 views

Awaken after millions of years of spacetravel, what day is today, what time it is and to where should I look at? [closed]

Bob is a 30 years old man who has a religion, called Bobism that is a particular blend of Judaism, Islamism, Christianism, Buddhism, Madeupism and Wtfism. Bob is a strict rigorous practizer of Bobism. ...
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4 votes
2 answers
158 views

Effects of CME (coronal mass ejection) on astronauts, or other ways to die in space

I'm writing a sci-fi story involving a lot of asteroid mining and things like that. A major character is a 'development scout' for a large company and has a backstory in which they apparently made a ...
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  • 43
1 vote
2 answers
116 views

Gravity assisted travel along a Cosmic string

VSL (variable speed of light) cosmologists have theorised that Cosmic strings could be used as FTL highways for information. This is based on the theory that the speed of light was infinite at the ...
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15 votes
5 answers
2k views

Playing cards in zero-g

Suppose there is a wandering starship that travels between the stars, bringing blackjack and hookers to every wormhole it crosses. This casino is like any other on a planet or station, except it ...
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  • 1,165
4 votes
2 answers
122 views

How could a starship take on a planet-massed passenger without noticing?

tl;dr: How could one ship transfer a planetary massed being to another ship without them noticing the gravity field during the operation? How could two ships rendezvous in deep space with one of ...
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  • 251
5 votes
4 answers
489 views

Could a rocket use negative mass to fly without energy?

My scifi world obeys the real world conservation laws. This presents a problem for spacecraft; due to the conservation of momentum, the spacecraft will need propellant, and a lot of it, for every ...
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  • 11.7k
1 vote
5 answers
159 views

What are some hypothetical specs for Elon Musk's next generation Starship for 2060?

Elon Musk's Starship, formerly known as the BFR (then the ITS), is planned to be the workhorse to transport people and goods to Mars. Theoretically, the rocket could be ready for orbital testing ...
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32 votes
30 answers
8k views

Plausible natural reason why you can land on a earthlike planet yet can never get back to orbit from it?

Imagine a future where humanity has reached the stars, an exploration party lands on a earth like planet that's liveable (doesn't have to be perfect but life on it is on the range of what most people ...
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  • 6,609
2 votes
3 answers
164 views

What is your fuel consumption when traveling at relativistic speeds?

For a given distance of travel, your fuel consumption can be calculated by running hours instead of distance. This is common when you're traveling by boat for instance. You don't typically say "I ...
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0 votes
1 answer
88 views

Non-sphericity of "omnidirectional" signals? [closed]

Short version: If an omnidirectional signal is being sent from one side of an object that causes appreciable attenuation does it result in an egg shaped detection envelop or something stranger? Long ...
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12 votes
11 answers
4k views

With FTL technology is it possible to leave after another and yet arrive before it?

There's a plot point in my script that has been bothering me for a while. My story has faster-than-light travel thanks to distortion engines, which re-purpose the artificial gravity inside the ships ...
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  • 8,617
3 votes
4 answers
156 views

What would be the possible energy sources for long term space travel?

What makes the most sense (real or theoretical) for energy sources to power large spaceships for thousands of years, not renewable
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  • 39
5 votes
12 answers
461 views

Warfare in a universe with FTL on rather fragile platforms? [closed]

How do you imagine the large picture of space warfare would shape into in a universe with the following characteristics: There is FTL, but it's just available in very large and expensive platforms, ...
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3 votes
3 answers
220 views

What is the most optimal thruster placement in a planet-sized creature?

As a follow-up to my previous question, I spoke about an anomalous planet-sized serpentine creature that lives in space and how close it could get to earth. However, while developing the thing, I ran ...
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14 votes
17 answers
5k views

How to stop space pirates from stealing goods using a teleporter, without breaking the bank?

In the good old days, the space pirates used tractor beams to reel in unsuspecting merchant vessels before robbing them. Recently reports of them cohorting with the rebel army soon spread across the ...
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  • 45.9k
3 votes
3 answers
362 views

How to explain the warp gate looking like a giant funnel in space but its working principle is a spherical wormhole?

In many sci-fi tropes, a warp gate or artificial traversable wormhole almost always resemble a funnel however in reality its working principle is a wormhole. I would like to know how does it appears ...
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  • 45.9k
3 votes
3 answers
188 views

Is delta v relevant for interstellar travel for generation ship?

Imagine I have a generation ship that is heading to a nearby star system say 10 light years away, the average lifespan for the crew is 150 years on Earth and is expected to increase by about 5 years ...
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4 votes
2 answers
1k views

At 1.5 g of constant acceleration, how long does it take to get to 0.93c?

I just finished reading Andy Weir’s “Project Hail Mary”. He crafted a situation where a ship with was able to travel to Tau Ceti, some 13 light years distant. Having crew, he limited the ...
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  • 1,668
-4 votes
1 answer
108 views

Interstellar Evolution [closed]

Is it possible for a species/ecosystem to travel the stars? I'm curious what this would look like. How many generations would it take to adapt to a planets atmosphere and propel a seed colony carrying ...
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2 votes
2 answers
115 views

Interstellar Space Travel via Time Travel

Building upon the questions from @States Time travel from stationary position? and @Travis Time travel from stationary position?, would it be possible to travel to other star systems within our galaxy ...
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  • 677
2 votes
2 answers
102 views

A Repelatron Spacecraft

In one of my favorite books, Tom Swift in The Race to the Moon he uses a spacecraft which is propelled by devices called repelatrons which are attached to the hull of the craft. They can be programmed ...
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40 votes
12 answers
5k views

Differences in mindset between people born in space and people born planetside

In my world, humanity has populated the stars and now lives in isolated groups in single star systems. Most people never leave the system they were raised in [interstellar travel is very unusual, but ...
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  • 740
9 votes
6 answers
1k views

Could an object traveling at a significant fraction of light speed create a black hole?

Nothing with mass can reach the speed of light because the closer to the speed of light it gets the more mass it has tending toward infinite mass as it approaches light speed & the more mass it ...
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  • 7,201
3 votes
3 answers
174 views

Would spacecraft suffer from fevers?

Spacecrafts produce a lot of heat, which must go somewhere if the inhabitants don't want to die. And in space, the only way to get rid of the heat is to radiate it away One way of achieving this would ...
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12 votes
17 answers
6k views

What would cut off a Mars base from Earth's support for an extended period of time?

Consider a Mars base, circa the 2040s. A joint NASA and SpaceX mission proved successful in the 2030s, and now a real colony is starting to develop. SpaceX has brought a good number of people to the ...
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  • 2,441
12 votes
10 answers
2k views

What phenomena can explain not detecting a planet while detecting a more distant planet?

Humanity detects a very suitable planet, lets call it Vaung, that is roughly 80 years away from us with their current technology. A ship is made and sent to colonize it, same old stuff. The issue is ...
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  • 7,605
0 votes
0 answers
53 views

What type of calendar can use people after colonization of solar system and other stars? [duplicate]

I'm making game about distant future where people colonized space. They live at Earth, Moon, Mars, Venus, Mercury, gas giants moons and also on exoplanets. If I use Earth calendar, it will be ...
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  • 109
0 votes
1 answer
72 views

Plausibility of Low-Pressure Breathable Atmospheres?

My question is inspired by the fact that in the computer game Elite:Dangerous, the player's spacecraft is capable of landing on planets with "tenuous" atmospheres, measured as being 0.1 ...
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2 votes
3 answers
188 views

What's a practical use for a gravity based magic system? [closed]

My magic system operates thusly - Using some kind of material, probably a special clay, maybe it's been changed by some kind of process, a magic user can shape the clay into balls of varying sizes, ...
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