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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.

5
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1answer
165 views

Acceleration/Deceleration equation for travel within a solar system

Basics: There is a wormhole in a fixed position within a solar system. It is roughly 40 million miles from the orbit of the habitable planet, which kind of mimics Earth (roughly 12 month solar orbit ...
0
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3answers
112 views

How might wizards figure out how to walk on the moon? [on hold]

A group of wizards is currently planning a trip to the moon to study why it makes werewolves happen. They plan to teleport to the lunar surface, do a few hours of investigation (e.g. watch samples of ...
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4answers
256 views

How can I measure the distance between two stars? [closed]

So I am doing a write-up for a world setting set in our galaxy. I know the distance from Earth to the different stars in Light Years. However I am now trying to figure out how to measure the distance ...
42
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10answers
7k views

Electricity free spaceship

Assume there's a spaceship in earth orbit that its crew of 24 want to get to Mars, the crew are all humans and possess all of modern day knowledge and equipment, is it possible for said ship to make ...
29
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10answers
6k views

Non-aqueous eyes?

I am trying to create an organism that can survive in space for short periods, but I realized that I can't have its eyes be similar to those of most animals and humans because they would boil in space....
5
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1answer
150 views

Traversal of creatures in space (hydrogen metabolistic processes)

For a space-based story I am writing, I was hypothesising about how to have organisms that can thrive the vacuum of space. Ignoring plausibility of such a creature evolving, I realised a few problems ...
1
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3answers
166 views

What safeguards are in place on a seedship fleet to ensure that all eventual crew members are interested in the mission? [closed]

Knowing that a journey to Some Star would take too long for a fully trained crew to survive, and in the absence of suspended animation, we have decided to send a ship with embryos on board. Once they ...
32
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13answers
7k views

What does the view outside my ship traveling at light speed look like?

World Rules: Travelers are able to move at the speed of light without disruption of their lives. Time passes "normally" for them. They think, breathe, love, cry, and steer the ship as if they were ...
7
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3answers
249 views

Which moon is most favourable as a refuelling station?

My hypothetical gas giant has five major moons. Three of those moons are icy bodies with abundant water ice and volatiles. Any of these could provide fuel for translunar spacecraft, or for spacecraft ...
3
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2answers
124 views

Launch window from heliopause to Earth?

Assuming an ion propulsion ship was leaving station in an orbit at the radius of the heliopause, and the most direct trajectory takes 18 months to get to Earth, would there be a launch window or could ...
7
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2answers
102 views

Are these atmosphere compositions for habitation in space plausible/do they cause problems I don´t see?

On Earth, our atmosphere contains 78.09% nitrogen, 20.95% oxygen, on average around 1% water vapor at sea level, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Looking through ...
10
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1answer
143 views

Could a form of acoustic levitation be used as artificial gravity?

So I heard about this thing on vsauce a while ago, where scientists use this thing called “acoustic levitation”. They use ultrasonic frequencies to levitate various substances, for use of studying ...
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1answer
127 views

How realistic is the travel of the Wandering Earth, would its mass be enough as energy source? [closed]

In the movie Wandering Earth, our planet travels to another sun. That is, it gets attached about 10000 engines fed by rocks. https://en.wikipedia.org/wiki/The_Wandering_Earth Given humanity could ...
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12answers
2k views

Guns in space with bullets that return?

I was reading on another question (this one) and was thinking "What if those bullets could return?" What I am looking for is: Practicality Cost effective Combat effective Manufacturability
28
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4answers
4k views

How likely are Coriolis-effect-based quirks to develop in starship crew members?

This one's more sociological, and it seems like a shoe-in to me, but sociology was never my strength. Given how pronounced the Coriolis effect of a smaller Von Braun wheel would be, does it seem ...
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3answers
341 views

Deep space acceleration limits?

Assuming the power source for such acceleration places no limit on things, how quickly can a space craft be accelerated to the speed necessary to cross the distance between Jupiter and the sun in ...
8
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2answers
343 views

The handwavium drive is broken! Is there any hope?

I was recently looking at this question, which seems to argue that FTL travel within the existing laws of physics can risk resulting in the destruction of half the universe. (Specifically, bad things ...
74
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15answers
11k views

How could we fake a moon landing now?

The moon landings actually happened, and there's plenty of contemporaneous evidence of it. But what if the United States government wanted to fake a moon landing now? We have the technology to ...
3
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3answers
93 views

Object in the orbit or orbiting Uranus's moon Puck

I realize the response to this question is fairly involved but here goes. I need to have an alien spacecraft either in orbit around Uranus's moon Puck or somewhere in Puck's orbit around the planet if ...
23
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13answers
6k views

Most bit efficient text communication method?

What would be the most efficient text communication method for a spacecraft operating on a super low bit rate (I'm talking something like 5 bits an hour, excluding error handling)? As you want both ...
0
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1answer
121 views

Is using light as a reactive mass in a rocket engine possible? [closed]

How practical would be a rocket that would use laser light as a reactive mass, given there is a very efficient electric energy source or storage?
2
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2answers
120 views

What phenomenon (gravitational?) in space would allow the transfer of humans rapidly between two planets or system-wide?

So what I'm looking for is some plausible idea of two human planets, orbiting each other closely, that despite having regressed to a medieval homage, were capable in this old era of powering solar ...
13
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4answers
368 views

Navigating storm fronts in space

Storm fronts — especially surprise storm fronts — are a popular Sci-Fi trope. Ion storms and radiation storms and neutronic storms and they invariably look 2D, like ribbons in space. But ...
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14answers
2k views

Would an alien lifeform be able to achieve space travel if lacking in vision?

Think of this alien life form as something resembling earth bats, placed in a planet with Earth-like conditions. Micro-bats have small and poorly developed eyes. Similarly, this alien species is ...
14
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6answers
351 views

Flight paths in orbit around Ceres?

In my sci-fi world, mankind has begun colonization of the large asteroid Ceres. It's a mining hub, with a lot of cargo vessels transporting things in and out. Hydrogen peroxide fuel is cheap and ...
0
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2answers
86 views

A pair of similar celestial bodies coming near each other

In my conworld I have two moons (they could be planets if desired as long as they can stay 'close' to a larger nearby body) of habitable size. I want to reality-check and provide an explanation for ...
3
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2answers
215 views

Is it possible to break the sound barrier in space with a really fast spacecraft

I was doing some research online about slower-than-light interstellar spacecraft, and it got me thinking about a couple things. Although it may seem empty, the space between stars isn't a perfect ...
6
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3answers
444 views

Spaceship fuel on Europa

What would make a good propulsion source for small engines and manouvering thrusters for spacecraft vehicles on Europa (moon of Jupiter), both for near-surface operations (vacuum) and in caves beneath ...
6
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4answers
250 views

Could a primitive sapient civilization survive on a planet being pulled along by a shkadov thruster?

From my understanding shkadov thrusters, they use huge mirrors built on the scale of a dyson sphere, to reflect all the radiation of a star in one direction, accelerating the star as an enormous star-...
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2answers
48 views

How to protect astronauts and spacecraft from solar flares on long space journey?

Background I have a spacecraft traveling from one planet to another, say from Earth to Venus. The journey will take at the least several weeks. During this time, the sun will emit a number of solar ...
37
votes
12answers
9k views

How to get directions in deep space?

A spaceship crew, during their interstellar travel loses control of the spaceship for a few hours due to external factors (exact factor not important). This causes the spaceship to deviate from its ...
9
votes
1answer
152 views

Low-efficiency fusion propulsion?

I'm working on a fusion rocket concept for a hard science fiction setting. I'm envisioning laser catalyzed Proton-Boron reactors (low waste heat, aneutronic, 100% of their output being He4 Alpha ...
13
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6answers
1k views

Time travel from stationary position?

This is my first question on this site, which I recently found and can’t get enough of. In many time travel scenarios, the machine is static in space. My question is how to explain this. For ...
8
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5answers
260 views

How can I make a dense asteroid field?

Okay, so I'm working on a novel and I'd like to have a dense asteroid field, something akin to the old ESB Hoth field, though it doesn't need to match that exactly. The notion is there is an advanced ...
53
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19answers
11k views

How do spaceships determine each other's mass in space?

Set in the distant future, space travel becomes prominent and cheap. I can imagine each spaceship would have a multitude array of sensors to track distance and relative position in space. Is there a ...
36
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11answers
10k views

Can a space-faring robot still function over a billion years?

This short story, which I've already written, is set in the FAR, FAR FUTURE, where a robotic space probe is exploring as much of the known universe as it can, despite its AI not knowing if its ...
2
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4answers
232 views

What use is growing body hair in space?

It is important to tie up loose ends especially when in micro-gravity environment, we sure do not want to accidentally damage the delicate pieces of equipment crucial for keeping the spacers alive and ...
0
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4answers
147 views

Fuel for a commercial space shuttle

The Aurora company has unveiled the new Interplanetary Airliner (usually simplified to space shuttle) offering both affordable and comfortable space travel to the middle and upper classes of the ...
12
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1answer
1k views

How to explain planetary rings pulsating?

A spacecraft enters an unnamed system and spotted a gas giant with a pulsating planetary ring, it glows bright intermittently. What natural phenomenon could be responsible for such brilliant display? ...
3
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4answers
142 views

What drive/engine would allow Medrunners to make it to Venus from Oberon in one to two weeks

Medrunner Lao Dorn and his team have been given a mission. A young woman has contracted some sort of parasite that is slowly eating away at her vital organs. The doctors on Oberon are unable to do ...
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4answers
1k views

How can a large fleets maintain formation in interstellar space?

Earth is under attack, the empire has gathered thousands of battleships each has a displacement of 500,000 metric tonnes and 20 motherships with a displacement of over 15 million metric tonnes now ...
38
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18answers
10k views

Why would space fleets be aligned?

Recently I noticed how space fleets are all constructed so the ships are all aligned. With 'aligned' I mean the way how all ships seem to have a 'right way up' and that all the ships have the same ...
9
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10answers
1k views

Plausible reason to leave the Solar System? [closed]

According to this article, it would take tens of thousands of years to travel to the nearest star given today's technology. My question is, what could give the countries of today, or most of them at ...
23
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19answers
11k views

What is a good reason for every spaceship to carry a weapon on board?

In the near future humanity has started mining on Mars. International (and interplanetary) treaties governing the use of lethal weapons in space dictate that anyone possessing such a weapon must carry ...
12
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6answers
2k views

What would be some possible ways of escaping higher gravity planets?

I know that chemical rockets would allow for some minor loads to escape the gravity of a planet with higher gravity. My question is, what kind of technology would possibly allow a dominant species ...
2
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2answers
171 views

Can artificial general intelligence live forever? [closed]

Suppose some advanced civilization has created some AGI. AGI, i.e., strong ai, could successfully perform any intellectual task that a human being can and also carry massive knowledge databases. ...
20
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3answers
902 views

Scaling Up Internal Mass Drivers?

Internal mass drivers are a potentially useful space drive, due to the ready availability of reaction mass (you can use anything from spare parts to literal dirt as a propellant, assuming you have a ...
0
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1answer
160 views

What will it cost me to travel through Time? (Part 1: Travelling forwards in Time - Time Dilation)

There are many questions on Worldbuilding about what item(s) a time traveller should take back in time in order to alter past events or even simply to survive. There has never as far as I know been ...
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1answer
95 views

What do you think about pulsed ntr as a low end torch drive [closed]

Can pulsed ntr be a good torch drive. Atomic rocket says that with some development it can be a low end torch ship. Suppose extraction of hot fission fragment is possible and and also better cooling ...
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22answers
13k views

How to prevent superluminal traveling idiots from wrecking half of the universe?

Linked but not a duplicate of this question. An example of the problem During the last Star-Wars movie, I was dumbfounded by the sheer stupidity of admiral Holdo's move, during this particularly ...