Questions tagged [spaceships]

For questions involving implemented theory or technology for travelling through space. Consider also [space-travel]. See also the tag information (click "info") for more details on when this tag applies.

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2
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4answers
26 views

Would there be any place for nuclear powered spaceship in the world proliferated by antimatter propulsion?

Nuclear fission rocket is becoming obsolete and is superseded by the more efficient antimatter engine, in fact there will be no pollution and the efficiency is around 100%. I'm wondering if in a ...
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4answers
139 views

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 ...
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1answer
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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 &...
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1answer
100 views

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 path ...
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3answers
94 views

Why does FTL travel require a human who can survive in space? [closed]

Imagine ftl space travel that requires modifications to the human body enabling them to survive in space without a spacesuit, possibly even truly skyclad. What mechanism for ftl travel might require ...
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6answers
142 views

Two Structures Adrift In Space

There are 2 planet sized structures that are artificially made with no means of propulsion. Each structure has the approximate mass of Earth but are hollow inside. The inside area is where the people ...
4
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2answers
120 views

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 ...
6
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5answers
3k views

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 crew ...
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7answers
2k views

Why don't military spaceships use blockchain technology for ship log? [closed]

Straight to the point, cut out the backstory: If blockchain is so secure and difficult to hack why don't the military spaceship use it for logging important and also non essential events, navigation, ...
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5answers
221 views

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 here ...
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6answers
301 views

Why didn't many people see this spaceship?

An alien spaceship opened a wormhole to a location in near-Earth orbit just long enough for a ship to come through. The ship intended to make public, peaceful contact with Earth upon arrival, but ...
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4answers
149 views

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 on ...
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4answers
188 views

What type of planet where non-aerodynamic space launch vehicles are possible

What would be the approximate gravity, atmosphere etc. of a planet for a species to never make or use launch vehicles with rounded shapes like tapering cylinders, because they make use of the ...
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2answers
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Solving the biggest problem of relativistic interstellar spacecrafts

In FTL-free universes, interstellar travel is often done by vessels capable of continuous acceleration (the drives themselves are often magitech), which can use the effects of relativistic time ...
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3answers
170 views

How to protect oneself against strong magnetic fields?

Spacecraft in my Scifi setting use strong magnetic fields for many purposes. Fusion containment, magnetic nozzles, gauss guns, magnetic fields as pusher-plates for nuclear pulsed propulsion and ...
7
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3answers
251 views

1g Acceleration Spaceship Design

In my story, a ship is built in orbit around Earth, designed for a 20-person scientific expedition to a planet 11.4 ly away. It will accelerate at 1g for half the distance, then flip around and ...
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15answers
7k views

Dodging a Deathbeam travelling at speed of light

There are 2 ships in space about 1 AU1 apart. Ship A fires a deathbeam on Ship B. The deathbeam travels at speed of light with no acceleration (or deceleration) at all and is guaranteed to hit its ...
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4answers
342 views

What kind of faster-than-light travel is this and is it at least plausible?

I've had a fairly complex world built up in my head for several years and finally writing a story in it. One thing I'm struggling with is explaining the galaxy's faster-than-light traveling. It's not ...
6
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2answers
195 views

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 through. ...
6
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5answers
248 views

Are laser-stars the better missile carriers in space warfare?

Laser-stars are war-spacecraft optimized to accommodate a huge laser weapon capable of eliminating an enemy thousands of kilometers away. They will usually have enormous radiators to deal with the ...
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9answers
2k views

Most optimal hallways with random gravity inside?

Lets say you have a space ship. This ship will do a lot of maneuvers causing a lot of G forces to go in different directions through the ship. During straight acceleration it pushes the people inside ...
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3answers
153 views

Realistically, what type of weapon is the best at delivering a specific radiation in space battle?

It's 20 years into the future, and humanity is (trying to) reaching for the stars. And congratulation, we have met a lot of quirky alien civilization, as per SF tradition. Unfortunately, this isn't ...
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3answers
119 views

Launching a spaceship with a portal-based engine?

I previously asked how best to use wormholes for spaceflight, focusing mainly on propulsion in space. I'm now wondering if there's a good way to get off Earth with this ship. The ship needs to be ...
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6answers
4k views

What could possibly power an Alcubierre drive?

I understand that in order to compress and expand spacetime, an Alcubierre drive would require some sort of "exotic matter" with a negative energy density. Is that sort of exotic matter purely ...
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1answer
91 views

What happen if a giant cargo ship full of nuclear weapons crash-landed? [closed]

This is a big boi cargo ship we're talking about, the kind so large that it can't "blast off" - it has to be built in space and stay there. It is definitely not death-star sized. Let's say it's as big ...
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3answers
2k views

Destroying Hypervelocity Rounds With More Hypervelocity Rounds

In a previous question, I asked about using a scaled-up whipple shield to protect against a 250kg tungsten round traveling at about 60 km/s. The round in question is 'about' 10 cm in diameter and '...
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3answers
341 views

How fast could our modern-day world build a rocket to the moon if we threw our resources at it?

For some reason, all the nations in the world have banded together. Their goal? Go to the Moon. Their budget? As much as the planet and humans can throw at it. How fast could we build a reliable and ...
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19answers
6k views

Beyond Futuristic Technology for an Alien Warship?

So, it's several hundred years in the future and the majority of humanity now live on artificial habitats, either clustered together into nation-sized groups or scattered individually across the solar ...
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4answers
968 views

Can a Scaled-Up Whipple Shield Protect from Hypervelocity Rounds?

Specific situation question: I have a ship with a 'whipple' shield consisting of 5cm of titanium (or a material similar to it) spaced about 50 meters away from the main hull (which is itself pretty ...
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3answers
195 views

Nuclear Cannon: Viable Alternative to Coil / Railguns?

In one of my previous questions, I asked about the viability of creating a coilgun for use on a sci-fi warship which would be capable of accelerating a 1000kg projectile to a velocity of 30 km/s or ...
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3answers
550 views

If a space ship entered Earth orbit, how likely is it to be seen?

Mostly what it says on the tin. If a spaceship, let's say about 200 meters long and 100 meters wide (made of modern materials) was approaching Earth and slowing down (say from 100 km/s to 3km/s), how ...
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9answers
540 views

What are the Limits of Laser Weapons in Space?

In my eternal quest to model a decently-realistic sci-fi space combat system, I've run through the limitations of particle weapons, magnetic accelerator cannons, and fusion rockets. Now it's time to ...
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1answer
113 views

Is liquid metallic hydrogen, when used as a spacecraft fuel, a chemical fuel? [closed]

Is it scientifically sound to call liquid metallic hydrogen a chemical rocket fuel?
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1answer
219 views

The Aether: Problems with a Future Fantasy Solution to a Science Fiction Problem

In my last few questions, I found out that space is, in fact, hard. Making a realistic sci-fi spaceship that does the things I want it to do (throwing around multi-ton kinetic projectiles at dozens ...
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3answers
238 views

Ring-Shaped Particle Cannons and Circular Coilguns

In my previous question a guy called Thorne pointed out that I could make a high-velocity coilgun without using a barrel of enormous length by taking a page out of the LHC's book and using a circular ...
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3answers
320 views

To Handwave or Not to Handwave

...That is the question. In my previous question, I asked about coilguns, how powerful we could make them and their plausibility. In that thread, and the discussion I had with Starfish Prime ...
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3answers
2k views

How Powerful a Starship Coilgun Can We Make?

I've spent a good deal of time working through the mechanics of 'realistic' space combat, and figure that good old kinetic projectiles will probably still at least be part of the arsenal, if not the ...
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2answers
455 views

How large would a space station have to be to hold one million people indefinitely?

A moon-sized asteroid approaches Earth in the near future, where space tourism has become normal. The Earth has a few satellite structures above Mars conducting research, as well as successful ...
21
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11answers
2k views

Can realistic planetary invasion have any meaningful strategy?

The sea is used as an analogy in space travel, and sometimes it works well. Ships sail on long journeys, between distant lands, across a hostile medium. But these analogies tend to break down when it ...
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14answers
3k views

On the feasibility of space battleships

We all know and presumably love enormous space battles with vast battleships doing minimal damage to each other for hours before being blown up by a single fighter. On Earth battleships became big ...
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4answers
244 views

How best to use wormholes for spaceflight?

The goal is to get from Earth to the Outer Solar System, preferably the Kuiper Belt, as quickly as practical, with a crew of about 12, and a not-set-in-stone dry mass around 30 tons. The characters ...
11
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5answers
294 views

Preconditions for 'Classical' Space Fighters and Carriers

Let's say that I, like many other worldbuilders before me, want to have 'classical' (space-operatic) space fighters and carriers in a space setting. However, I don't want to do it by fiat and ...
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1answer
90 views

Can one build a spacecraft containing an evacuated chamber on its exterior wall? [closed]

Basically, the evacuated chamber is to perform some experiments. The spacecraft is of single stage to orbit variety. I am asking in terms of whether one can build it using generally used materials of ...
31
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15answers
10k views

Starships without computers?

Say I've got a sci-fi setting where I have one faction using relatively advanced technology (think The Expanse, or pre-Covenant war UNSC from Halo, fusion rockets and high-yield magnetic accelerator ...
10
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3answers
841 views

Casaba Howitzer vs. Magnetic Shelds: Plausible Counter?

I'm trying to work through the mechanics of hard sci-fi space combat, and I came across the Casaba Howitzer. The basic idea is a nuclear shaped charge. The blast from a nuclear bomb is partially ...
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8answers
6k views

Dogfights in outer space

Assuming spacecraft are using contemporary propulsion technology, and are engaging in a dogfight in outer space (whether they are manned, drone, or autonomous), would the movements of the craft be ...
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4answers
249 views

Space Combat Friendly Physics: Jump Drives?

I'm doing some thought experiments towards a computer game that simulates space combat, and I want my engagements to be interesting to players but still be relatively hard-science. Yes, I know this is ...
6
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7answers
313 views

Interplanetary fighter craft

Am I correct in assuming that an interplanetary fighter craft using existing technology, that functions exclusively in the vacuum of space, could be made inherently lighter, more maneuverable, more ...
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7answers
3k views

If there were no space agencies, could a person go to space?

I'm writing a story and I was thinking about the ending in advance. I posted a question about how the population would be wiped out. I have developed from that and thought about the virus having no ...
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4answers
600 views

Planting Trees in Outer Space

Say a group of people travel to a different planet where they have to wear spacesuits to live (because there's no oxygen and because of the atmosphere's density). What would happen if they planted ...