Questions tagged [space]

For questions related to outer space, stellar systems, stars and other astronomical phenomena.

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The Moon in a Geocentric Model

Thanks to all who helped me with my first question about how a geocentric system would work! I'm not sure how the moon works in a geocentric model. (This would be a roughly Earth-similar world, ...
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2answers
124 views

Asteroid thicket dogfight in Saturns rings

Sadly, the asteroid belt isn't the place to showoff your ace pilot skills. It is so sparse you wouldn't even see an asteroid most of the time if you flew through it. But Saturn's rings! The rings ...
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9answers
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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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9answers
1k views

How could a steampunk zeppelin navigate space?

it's my first question here, I'll try to be clear. I'm creating a story where there is a steampunk style civilization that has to face advanced civilizations in planetary and spatial battles. I'm ...
4
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2answers
175 views

Why would a spaceship rely on hydroponics instead of algae for food?

Currently, NASA is investigating the use of hydroponics, aeroponics, and other low soil techniques to grow regular plants for consumption and oxygen generation/CO2 removal on long voyages in space. ...
13
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4answers
630 views

Will asteroid mining be economical in foreseeable future?

I see that asteroid mining had already been extensively discussed in the context of today's technology (Ex. Is Asteroid Harvesting economic?) and the answer is a definitive "No" - it's not economical ...
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5answers
172 views

What are some examples of minerals that Earth might require in the future from space?

I'm looking to know about minerals that space miners can extract from other planet surfaces or directly from asteroids. Something that Earth as a planet may need in the future.
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1answer
86 views

Multiple earths orbiting around the sun? [duplicate]

Let's say that another earth popped into existence in our solar system on the exact same orbit around the sun as our earth. Say it is exactly opposite to the earth in the orbit. How would this new ...
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3answers
325 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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2answers
153 views

Implications of a scifi society's industry [closed]

If a space faring society has access to such resources, and technological capabilities that they are able to make alloys strong enough to build large, armored space vessels, extract gas from a gas ...
3
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3answers
165 views

can a moon rotate around two planets

I was wondering if a moon Is in the center of two planets If the gravity will rip It In half or If a moon can rotate around both planets or if the moon manipulates the planets rotation
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2answers
122 views

what's the name of a solar day on other planets? [closed]

people refer to a solar day on Mars as- "sol". are there any specific names for solar days on other planets, such as Jupiter or Venus for instance? or either "sol" is just a name for a solar day on a ...
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3answers
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Can planetary bodies have a second axis of rotation?

Is it possible for a planetary body to have a secondary axis of rotation? For example let's say there's an Earth-like body that is spinning with its North Pole facing the Sun. Imagine that the North ...
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3answers
153 views

What would happen if many asteroids with a combined mass equal to ten times that of Jupiter were dumped into the Solar System? [closed]

One day, numerous asteroids inexplicably appear out of nowhere in the Solar System, distributed evenly in a ring between Earth and Mars. The asteroids are a mix of primarily carbonaceous, stony, and ...
4
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1answer
95 views

Tidally Locked Planet, Weather

If the polar cap of a tidally locked planet was all ocean, what weather patterns would emerge? The ocean couldn’t be half frozen/half boiling, right? I need a weather pattern so the planet isn’t just ...
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7answers
4k views

How to make classical firearms effective on space habitats despite the coriolis effect?

The direction of the force will always be perpendicular to velocity and pointing to the opposite side of the rotation direction. In plain terms, any object traveling in the rotation plane: up (toward ...
3
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2answers
95 views

Harvesting Energy from Gas Giants

In my world, humans live on a moon of a gas giant that has extreme weather conditions. They also: have crystals that can store energy. possess the ability to make floating islands (on which they can ...
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8answers
402 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 ...
8
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6answers
337 views

How to figure out that you traveled 570 million years into the future while in space on a small shuttle craft?

I want a character to get sucked into what she thinks is an FTL-wormhole-gate. While it turns out that the gate is indeed a traversable wormhole, it does not allow for FTL travel. The gate transports ...
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9answers
3k views

Methods and Feasibility of Antimatter Mining?

Say 200-300 years in the future, humankind has colonized much of the solar system, using a combination of laser thermal drives and solid-core nuclear rockets (fusion never really panned out). ...
3
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4answers
190 views

Can a planet orbit two stars, the first sun being like Earth's Sun, the second and larger star only visible from the planet around the horizon?

My planet orbits two suns. The orbit of the first sun is similar to Earths orbit around our sun. The orbit around the second sun however makes it appears only around the horizon. Is this possible?
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6answers
676 views

Can there be a unique planet visible each different month?

In my world, ten is an important number that shows up frequently. In the solar system my world belongs to, there are ten other planets beside it, and there are ten months in a year. I know next to ...
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17answers
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How could a planet have one hemisphere way warmer than the other without the planet being tidally locked?

I would like a planet that's a tropical paradise on one side but covered in ice and glaciers on the opposite side, whether it be the Southern-Northern or the Western-Eastern hemisphere. I know it ...
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1answer
146 views

Could a river be gravitating around a planet? [duplicate]

I am building a sort of space odyssey and I was wondering about something... In a DnD game I used to DM, Starfinder I believe it was called, there was this asteroids belt and in it was some sort of ...
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3answers
121 views

Need advice for a sci-fi Scylla and Charybdis [closed]

I want to set up a "Scylla and Charybdis" pair of hazards to space navigation. My idea is to have them blocking the end of a galactic arm that needs to be reached. I had a few ideas for both, but am ...
13
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1answer
373 views

Would a corpse look different on an interstellar spaceship?

I'm writing a murder mystery set on an interstellar starship. Context: The victim was found dead in a zero-gee chamber inside the ship. The ship is in interstellar space and traveling at around half ...
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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
128 views

What Would Happen To A Dyson Swarm Without Maintenance?

If an advanced race builds a Dyson Swarm comprised of millions of habitats and billions of solar collectors orbiting a star, and then are completely and inexplicably all killed with minimal damage to ...
2
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2answers
100 views

pressurizing a space suit [closed]

So was writing a short story about space and I had a random idea. Could you pressurize a suit with something other than gas/air? In theory you could literally put pressure on the person or fill the ...
2
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3answers
159 views

Would society become matriarchal, patriarchal or balanced if the military consisted mostly of women but the top leadership are men? [closed]

The premise is that in this world, mankind has extended their territory throughout the solar system. We now have colonies on multiple moons and planets. War and combat between the different factions ...
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1answer
107 views

How has Venus held onto its atmosphere [closed]

Without its magnetosphere, how has Venus held onto its atmosphere, when Mars lost its atmosphere and water when its magnetic field was turned off?
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3answers
292 views

Pocket Clarketech

Background: In the year 2204, humans have colonized most of the inner solar system. During the first explorations of the vast outer system, a team of researchers uncovers a series of alien artifacts. ...
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3answers
227 views

Maintaining a Moon Suit

The Apollo-era A7L Extravehicular Mobility Units were used for less than eight hours at a time, within a few days, with a maximum of three moonwalks per mission. Assume a fictional moonbase with ...
3
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1answer
134 views

Dystopian Future | Moon Destroyed What Would Our World Look Like in 500 years? [duplicate]

This question came to me after reading this question on the Astronomy Page, and having a length discussion with colleagues about the 2002 movie "The Time Machine". As a result I am looking for hard-...
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1answer
143 views

In the far future, humans wage war through spaceships that are mentally controlled solely by women. How would this affect the military and society? [closed]

A bit more explanation on the premise. Humans now have extended their territory to the edges of the Milky Way galaxy and have hundreds of colonial planets. However, humans still fight among one ...
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2answers
261 views

What would happen if the Earth passed through an interstellar dust cloud?

I understand an interstellar dust cloud as "an accumulation of gas, plasma, and dust in our and other galaxies. Put differently, an interstellar cloud is a denser-than-average region of the ...
3
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1answer
116 views

What would be the consequences of a planet having a core predominantly made of Krypton?

So I'm currently working on a fan project to redesign Superman's home planet of Krypton. This new Krypton is 1.6x the size of Earth and orbits the red dwarf star known to us as LHS-2520, 27.1 ...
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0answers
64 views

If there's a human-level civilization in a nearby star system, would we detect it? [duplicate]

So, I'm not into writing or creating any new worlds, but this question (or a set of questions) was bothering me for a while and I thought it's a good place to ask. If there exists an alien ...
8
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2answers
109 views

Movement on a small moon with Earth-like gravity [closed]

I been trying to imagine what it would be like to move around a small moon, around the size of Saturn's moon Iapetus, which possess Earth-like gravity on the surface. I recall reading an xkcd article ...
6
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4answers
595 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 ...
9
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6answers
348 views

Scientifically accurate fuel for a small spaceship

I'm designing a small two-person spaceship for use in battles in space. It is set around the year 2100. It would be around the size of a tank (approx. 50 tons). It would need to be fast and easy to ...
2
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6answers
269 views

How can a twin on Earth grow old slower than his/her twin sibling?

I understand it might happen in a weak gravitational field. If I have twins on Earth, but one of them suddenly gets transported to intergalactic medium (without any great mass nearby), then the ...
10
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6answers
4k views

What is a plausible power source to indefinitely sustain a space station?

I'm allowing for approximately 150 years of technological advancement. This is in Earth's future, so I want to be realistic based off of what we are capable of now and projections for declining ...
2
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4answers
265 views

Departments of an Uplifted Galactic Government

One of the gods in the universe stumbled across an species with potential and decided to uplift it. Instead of uplifting over the course of a couple thousand years, the god decided to do it in one ...
6
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2answers
342 views

Escaping a blackhole with an Alcubierre drive?

If your ship just got trapped inside the event horizon of an super massive black hole, could the ship "accelerate" back out with an alcubierre drive?
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2answers
2k views

Could a planet have a naturally occuring moon at one of its Lagrange points?

Would it be possible for a planet to naturally have a moon or large natural satellite at one of its Lagrange points? If so would it then also be able to have a second moon that would be orbiting this ...
13
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2answers
2k views

How to get the speed of my spaceship?

I have a spaceship that can get to speeds very close to the speed of light. How can this ship measure how fast it is going near the speed of light? I would think one would measure how fast other ...
12
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5answers
1k views

In order to successfully have 3 orbital rings around a planet how do you have to orient them?

I am writing a short story about an overworked planet whose civilization has achieved space elevators and orbital rings. The planet, which is earth-sized, has three complete orbital rings in stable ...
3
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2answers
149 views

Space missiles system [closed]

I have been reading lately the Honor Harrington series and I wonder how would torpedoes and missiles work in space. What Weber uses is some kind of nuclear head that pumps several lasers, does that ...
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0answers
166 views

Possible FTL travel methods for hard(ish) sci-fi? [closed]

I'm working on a story that requires travel at about convenient* speeds (see below). I want to keep this story as hard sci-fi as possible and I've heard about stuff like Alcubierre drives which sound ...