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.

Filter by
Sorted by
Tagged with
-3 votes
0 answers
56 views

How can I describe a plausible spacetraveling alien civilization that looks as unlike as humans as possible while maintaining hard sci-fi norms [closed]

Unless there’s some technology or science we don’t know about yet, wouldn’t any alien species that can space travel necessarily need to be humanoid. Keeping in mind the square cubed law and all this ...
10 votes
3 answers
1k views

Iron drive: does this fusion superengine require clarketech? [closed]

For context: this is a very far future sci-fi setting, dozens of millenia from now, where dyson swarms and interstellar travel are commonplace, bioengineering and tech are so advanced they merge ...
7 votes
10 answers
4k views

Avoiding time travel or causality stuff

How to avoid blatantly time traveling or breaking causality in a big way when getting my characters to places quickly (Faster than light)? The method used is a tunnel in some sort of different space ...
3 votes
5 answers
345 views

Assuming there was a spaceship that could counter-act the effects of being near a black hole, could a human observe the hole dissipating?

The most common explanation of what would happen to a space-ship that falls towards a black hole ends with spaghettification. However imagine there was a space-ship built out of unobtanium, that could ...
3 votes
3 answers
227 views

How would you get a ship out of a gravity well?

Context I'm helping a friend with a hard sci-fi story and we ran into an issue. In this setting the technology for absurdly powerful and efficient fusion drives which seem not to have heat managment ...
2 votes
1 answer
98 views

Effect of molecular clouds on space travel and civilization

To What Extent are Molecular Clouds Geographic Barriers in Space? In a sci-fi universe I've been working on for quite a while, I have different civilizations that are initially unaware of each other's ...
15 votes
17 answers
4k views

How can we meet aliens in an underpopulated galaxy?

I am designing a hard sci-fi universe where humanity is confined to the Solar system and travels using fusion. One of the obstacles I am facing is how to make humans meet one alien race which is ...
2 votes
2 answers
172 views

Could a creature which evolved in space using sunlight and gas for energy and propulsion, glide in our atmosphere?

I'm imagining roughly human-sized creatures which have 'sails' that they use to absorb solar energy and steer themselves around the solar system. I'm trying to think of a feasible way such a being ...
3 votes
1 answer
185 views

How much liquid hydrogen is required to veer a manned probe off course into an escape trajectory in deep space?

I am working on this horror-scifi story based on the lost cosmonauts theory, where the Judica-Cordiglia brothers detected an SOS from a manned probe veering off into space before Yuri Gagarin ahem... ...
5 votes
4 answers
1k views

Mt. Everest Hyperloop- Reborn

In my previous question, I was discussing about the possibility of using a mass-driver on Mt. Everest, to propel payloads to space, and reduce the amount of fuel needed (RIP bulky rockets). A diagram ...
9 votes
3 answers
3k views

What would it take for a spacecraft to travel to the sun's nadir and stop?

In a science fiction future universe, spacecraft routinely travel from a distance "above" a star's north or south pole to rendezvous with planets orbiting in the star system's orbital plane. ...
3 votes
3 answers
835 views

Internal Mass Driver Engines in Cislunar Space

An internal mass driver engine uses electrical power to accelerate reaction mass in a mass driver and to accelerate a spacecraft that way. Some designs assume relatively large exhaust particles (dust ...
2 votes
1 answer
247 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 ...
8 votes
3 answers
727 views

Could this hypothetical Sub-Earth support human life?

The Question Is a theoretical 2/3rds - 7/10ths Earth big enough to have the magnetic field, atmosphere and plate tectonics to do this, or will I wind up geologically killing the planet? I have been ...
10 votes
8 answers
5k views

Space-ships and stations...made from cast-iron?

If there's two things i love, it's space-flight, and late 19th century technology, and i hope to implement as much of the latter into as much of the former in my current setting. And one thing that ...
3 votes
3 answers
684 views

The late-victorian nuclear-thruster

Nuclear fission! How hard can that be? Nuclear reactors have been quietly humming under the earth's surface only a few billion years ago after all. It's very convenient then, that my planet's quite a ...
10 votes
5 answers
596 views

Would a star's spectroscopy be stable enough on approach to use it as a navigational reference from a great distance?

NOTE: The offered "duplicate" question IS NOT WHAT I AM ASKING. Alternative methods of navigation ARE NOT ACCEPTABLE as answers. I am specifically asking whether or not a ship traveling in ...
4 votes
2 answers
1k views

Amount of antimatter needed to propel large spacecraft?

Okay, So i'm not really into physics or mathematics but i'm trying my best to learn some bit of how the calculations needed for the amount of antimatter needed to propel a spacecrafft to relativistic ...
4 votes
2 answers
725 views

Spacecraft Design of a Cold-Blooded Humanoid Race

I was talking with a friend recently and he reasoned that a cold-blooded race would take longer to get to space, but survive more easily once the technology progressed enough. The rationale was that a ...
14 votes
4 answers
3k views

How stable would a rogue star system be?

By some means, artificial or naturally occuring, a human inhabited star system has been flung from the Milky Way. Prior to being ejected from the galaxy, the system bears at least one Earth-like ...
5 votes
2 answers
940 views

Communication between a stationary observer and a spaceship traveling at near lightspeed

I was wondering about the possibilities of communication between a stationary observer and a spaceship traveling at near light-speed(lets say 99.99%). If the observer can send out signals at a certain ...
4 votes
3 answers
2k views

Birds flying or swimming in space

I had a dream. Imagine the Moon as a bird nest the size of a dwarf planet. Flocks of adult birds travel through space to Earth in order to hunt their prey. (imagine gannet birds swimming in space) ...
2 votes
3 answers
309 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 ...
8 votes
3 answers
296 views

Preexisting wormholes: How to find aliens?

Setting The future, but not too far. No antimatter and no teleportation. Space travel is relatively reliable, but it's not cheap and it's powered by fusion. Space travel outside of the solar system is ...
23 votes
24 answers
6k views

What would stop a large spaceship from looking like a flying brick?

In the far future, galactic space travel is now a common reality, and spaceships reach sizes of over 1 kilometer in length. Any capital ship in existence would therefore be designed for functionality, ...
3 votes
6 answers
767 views

Can blind people build a spaceship and land on the Moon?

This question is inspired by Could a species develop the tech necessary to land on their own moon without comprehending light? Consider following scenario: a civilization of alien tricksters abducts ...
3 votes
1 answer
248 views

Seeking chart of nebula particle density vs. ship velocity

The traditional Sci-Fi nebula is thick as ketchup (I'm lookin' at you Star Trek!) but the reality of nebulae we know about is that a pilot wouldn't even notice that they're in one due to particle ...
0 votes
6 answers
1k views

Best female underwear for rocket travel [closed]

Rocket-based travel must minimize the amount of mass that is carried. At the extreme end, this would include eliminating mostly non-functional systems such as clothing Not all clothing is without ...
1 vote
2 answers
276 views

What could Kaiju do to stop us from travelling into deep space?

The world's overrun with Kaiju but, while they kill many and cause much destruction, our civilization continues, migrating inward, away from the coasts where the Kaiju typically occupy. Question is ...
5 votes
2 answers
294 views

Interstellar travel via a moving walkway of dust

The "moving walkways" pass close to local solar systems fairly far from their suns. They are very small, and thus hard to detect. Each "walkway" consists of two columns: dust and ...
2 votes
1 answer
134 views

Alt-history continuation of Dynasoar program

Just hopping over from SpaceExploration I'd like to know how realistic a use-case the DynaSoar spacecraft would be for a Titan descent craft, in terms of in-universe realism. I'm assuming no far-...
5 votes
4 answers
403 views

How small can a nuclear weapon get?

Context I am writing the section following a critical space battle where a rogue UNN Pearl of the Stars is taken down, and its CIC, reactor and, most importantly, its payload of 4 planet buster 15-...
3 votes
4 answers
659 views

Is there a reason for Rocket-style vertical takeoff craft when you don't need to bring reaction mass?

Reactionless Drives? I have a sci-fi setting that takes place very far in the future. I like to think it tends toward the harder side of sci-fi, so I'm trying to minimize the number of Clarketechs (...
82 votes
30 answers
14k views

Ugh, I'm stuck in an orbital spaceport. But why?

This is, for the record, the same universe as in Is space piracy orbitally practical? and How can I prevent Kessler Syndrome among space stations?. In my world, circa 2100, space stations orbiting ...
45 votes
13 answers
8k views

On our way to Mars: how do we do the laundry?

A human crew of 6 has been sent on mission to Mars The lowest energy transfer to Mars is a Hohmann transfer orbit, which would involve an approximately 9 month travel time from Earth to Mars, about ...
-1 votes
2 answers
145 views

How does a Person survive an intergalactic voayage?

Intergalactic voyages are long, they go over quite large distances, but you, a human in the Milky Way, want to see a galaxy beyond our own with your own eyes and live there. At 99% the speed of light, ...
4 votes
2 answers
642 views

How Much of the Universe Could Humanity Conquer?

Imagine that less than a million years from now, probably in the hundreds of thousands, humanity has spread throughout the galaxy. There are afew aliens here and there, but that is insignificant, they ...
4 votes
1 answer
179 views

Maximum acceleration of minimally modified humans in acceleration fluid

I've been looking into viable accelerations for minimally modified humans in an acceleration-gel-type chamber. Minimally modified means no permanent or significant changes to the human body. Examples ...
2 votes
10 answers
2k views

Is it possible for rockets to exist in a world that is only in the early stages of developing jet aircraft?

More specifically, is it possible for rocket engines comparable to those of the mid 1960s to exist in a world where in atmosphere jet engines are only in their early stages of development? This world ...
1 vote
1 answer
199 views

Would this design for a generational star ship be realistic for traveling to Alpha Centauri?

https://www.tinkercad.com/things/6hFXA0L0dOW I am writing a story with where the main character discovers this ship traveling to Alpha Centauri because our solar system has been devoured by a black ...
2 votes
4 answers
2k views

Probability of a spaceship stumbling upon a random planet?

In an intergalactic federation, space ships are extremely common. They run supply routes, defend planetary bases, and transport colonists to new worlds. To aid in these adventures, most ships would ...
3 votes
2 answers
269 views

How to make intragalactic space navigation difficult

Say there are two factions in a cold war with each other. Each faction controls huge amounts of the known galaxy, but there is a demilitarized neutral zone in-between them. Both factions have access ...
-1 votes
1 answer
70 views

Hycean world space travel [closed]

Hycean worlds are planets which bridge the gap between rocky and gas giant planets. They have atmospheres high in hydrogen and vast oceans with perhaps no dry land at all. How could the local sentient ...
-1 votes
2 answers
449 views

How many people could fit into a spaceship? [closed]

I’m writing a story where the world is coming to an end but I want it to sound as realistic as possible. The story takes place in 2024, not too far from now, and NASA sends out a crew in space to ...
2 votes
4 answers
873 views

How to use warp gates that can only travel at 0.05c?

Let's say that creating warp gates is possible, so long as both ends of the warp gate are stationary within some universal reference frame (no time travel please). The only problem with this ...
3 votes
1 answer
157 views

How much diamagnetic levitation can a human handle?

One of the limitations to human space travel is acceleration limits. We'd really like to just shoot spaceships out of a cannon to 99% the speed of light, but the resulting pressures on the human body ...
-4 votes
1 answer
97 views

For a 60 billion light year journey, what would be the distance with this wormhole? [closed]

An advanced human civilization possesses Portal Engine technology built in to their ships. These portal engines produce traversable wormholes from one end (the ship’s end of the wormhole), and uses ...
3 votes
1 answer
154 views

Millitary applications of a gravity drive [closed]

Let's say gravity drives exist. This is a device that can power a spaceship by creating an artificial gravity well some distance in front of the spaceship that the spaceship perpetually falls into, ...
6 votes
10 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 ...
16 votes
13 answers
3k views

Is a "20th century" spacefaring civilization plausible?

This civilization has computational technology roughly equivalent to Earth's in the late 20th century. We're talking post-moon landing, but pre-Internet (roughly 1969-1983). They may or may not have ...

1
2 3 4 5
19