Questions tagged [space]

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

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5
votes
4answers
115 views

Minimal counter pressure space suit, 10 minutes survival time

Counter pressure spacesuits allow, in theory, a wearer to not be in an air tight space suit and work in a vacuum. What is the minimum such suit that could be used in a survival situation, on a ship, ...
-1
votes
1answer
124 views

Is an Earth-to-Moon missile technologically possible?

Given current capabilities, is it possible for a missile launched from the surface of the Earth to impact the surface of the Moon? I would imagine the same "rocket" used send stuff to the ISS could ...
1
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3answers
86 views

Would tidal acceleration mean doom for this system?

So we have a Super Earth of ten Earth masses, just on the threshold, and it has three Mars sized moons (so a mass ratio of 100/3, more than Saturn Vs 3 Earths). They go 40,000km, 100,000km, 250,000km ...
8
votes
1answer
196 views

What does a global war look like from space?

In the game Mass Effect 3, several planets are invaded by scores upon scores of hostile aliens, who have enough resources to spread their forces over an entire galaxy and still be largely unstoppable. ...
9
votes
6answers
730 views

Could a mass made up of certain elements or compounds “disrupt” a star?

Inspired by this interesting question-- let's say that the universe was just really, really out to get a particular star, such as our sun. Is there a perfect cocktail where a mass significantly ...
62
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16answers
11k views

An Earth-like planet is found in another solar system. What are the top priorities after landing in order to create a self-sustaining colony?

Set in the not so distant future, we find a habitable planet very much like our own. The only downside is that it's around 500 years of travel with our current technological capabilities. We have to ...
2
votes
3answers
94 views

Logistics of how to mine an asteroid [duplicate]

How would one go about mining an asteroid in a broad sense? This question not in the mining itself, but location of the mining. Say you have located an asteroid in that would like to mine. Which ...
9
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2answers
268 views

Incoming Rogue Planet! When do we see it?

So say there was a rogue gas giant about the mass of Jupiter that, unfortunately, happened to be headed directly at Earth (or at least close enough to knock it into an orbit incompatible with life). ...
1
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1answer
82 views

Extracting all water from Ganymede?

Is it theoretically possible to extract all ice and water from moons with subsurface oceans like Ganymede or Enceladus? What would the consequences of isostatic rebounding be if this was done on a ...
14
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12answers
11k views

Is stealing the moon actually possible?

I'm writing a heist story set in the near future. The goal of my main protagonists is to actually steal the Moon. The budget of their escapade is not a variable; they will get this done however ...
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2answers
90 views

Inter-Planetary Communication [closed]

In my universe humans have colonized Phobos, Deimos, the moon, and Mars. However, they have no fast way to communicate with each other. I'm looking for a fast and possible way for humans to ...
4
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2answers
123 views

Space elevator off Europa without running into a nearby moon?

Would it be possible to build a space elevator off Europa? (The space elevator would only be for the purpose of getting items out of Europa's gravity well relative to Jupiter. At that point, the ...
7
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3answers
182 views

If you melted Europa's ice would there be any land?

First question: if you melted Europa's ice, would there be any land? Second question (assuming the answer to the first question is no), how much water would you have to remove after that in order to ...
1
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3answers
142 views

How long would it take to conquer a galaxy? [closed]

I will explain this as briefly as I can. I'm thinking about beginning a novel that has an MC that is born into a race of super-efficient alien invaders. They're able to take over entire planets ...
7
votes
2answers
122 views

Formula for send and response times of messages at fraction of light speed?

I have a ship that begins the equation traveling at 50 percent the speed of light, but decelerating constantly to finally land on a certain planet (towards which it is moving the entire time). It ...
1
vote
2answers
509 views

Can someone with a better understanding of physics review or correct my design of a hypothetical fusion reactor for space vessels?

I have a layman's (re: not very good) understanding of nuclear physics, and it's pretty cool to me, but I'm quite bad at math. I'm working on a sci-fi book (classic, I know) and just finished a draft ...
5
votes
3answers
190 views

Ways for advanced civilizations to mask communications on an interstellar / intergalactic scale

Say we have a civilization on the verge of becoming Type II, and are in the process of building a Dyson Sphere. They are aware that in the process, and especially after completion, there will be ...
-2
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1answer
58 views

Binary star system i need help finding habitable zone [duplicate]

I have revamped my queshton a 3th time so i can get my ansure. The last 2 times i forgot something or got my math wrong. so i hope i got it all and got my math right, third times a charm. I have a ...
7
votes
4answers
232 views

How could a skyhook stay in orbit with no human involvement for thousands of years

In the story I'm writing, three humans with stone-age technology and no knowledge of space accidentally awaken thousands of cryogenically preserved humans. These humans immediately get to work on ...
1
vote
1answer
116 views

I need help with the math of this Binary star system [duplicate]

I have talked before about this system in one of my other questions. I have figured out some more info about the planets/stars. I want to know where is the habitable zone and any other info you can ...
4
votes
3answers
237 views

How to get time to pass faster on another planet compared to earth?

I'm developing a story where humans colonize a few planets. One planet, lets call it Planet A, has similar gravity to earth, air pressure, and solar radiation. You cannot however, walk on the surface ...
2
votes
2answers
84 views

Feasibility of a 2nd, geosynchronous moon

In my world, there are 3 astrological bodies of significance, the sun, the moon, and a 3rd, geostationary object, believed to be the home of the gods. I want all three of them to have roughly the same ...
2
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3answers
180 views

How large of a moon could an earthlike planet possess

Suppose I want to have a moon with more gravity than ours how large of a moon can I have and what effects would there be.
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3answers
114 views

Night sky when man-made light sources are made obsolete. Would the night sky still be affected by light-pollution?

Im creating a world where for whatever reason all power on Earth is gone. Meaning there is no more man-made light. Which also means no more light pollution. Would the night sky revert to its former ...
8
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9answers
2k views

In a decadent galactic empire with instantaneous communication, how would the most remote planet gain their independence?

In a very large and decadent galactic empire (think of Asimov's foundation empire), a new technology leap allows planet's government bodies to communicate instantaneously across the galaxy. It can be ...
6
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1answer
103 views

How many satellites would we have to launch to create an artificial set of rings around Earth

Saturn has rings of debris which orbit it, and it is possible to get a satellite into an orbit that will at least last a few years, so my question is as follows; How many satellites (or just the pure ...
3
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4answers
116 views

Could a terrestrial planet become a gas giant?

I know that gas giants are much larger than terrestrial planets, but wouldn’t several million or billion years allow for it to gain mass from collecting space debris and the like?
20
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19answers
9k views

How do the Martian rebels defeat Earth when they're grossly outnumbered and outgunned?

It's the early 23rd century, and we are about 50 years into Mars being colonized. The planet, which was supposed to usher in a new era in civilization and the expansion of humanity into the stars, ...
5
votes
6answers
148 views

Locating rogue planet in deep space based on astronomical observations from its surface?

Assume that you have a Rogue Planet hurtling through deep space. Somehow, an alien civilization from, say, 1,000 ly away acquires astronomical data from this planet. This data is in the form of high ...
2
votes
1answer
48 views

Would time dilation alter apparent mass observed from outside time dilation zone?

A familiar scenario in scifi: a bubble of space is isolated artificially from the outside world by means of time dilation: time inside the bubble moves more slowly than time outside it. Assume that ...
-4
votes
3answers
167 views

Fiction / Theory: Produce gas version of solid elements

I am creating a sci-fi like game. I just want to ask if there is a theory how to produce gas version of solid elements in our periodic table. One of the notable element will be Silver and Copper. if ...
16
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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 ...
2
votes
4answers
356 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 ...
0
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3answers
110 views

All Conditions Weapon Platforms? [closed]

Basically, how to make modern weapon systems, specifically, tanks and planes, work in all environments. Background I'm currently putting together a role-play setting, which is fair high tech. The ...
4
votes
3answers
224 views

Would it be possible for a planet to go without sunlight for three months?

This planet orbits a larger planet, which then orbits a binary solar system. Is there a way - based on the tilt of a planetary axis or the positioning of the planet in relation to its mother planet ...
2
votes
3answers
184 views

Could a futuristic group of people collect/farm nuclear pasta from neutron stars?

Would it even be feasible under science fiction logic? It would allow nuclear weapons to be mass produced if the nuclear pasta could actually be collected and contained safely.
0
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3answers
87 views

SFR Breeders on Small Mars Moon feasibility

Need help with a topic for a sci-fi book. Basic premise is 200yr in future, mining facility on small Mars moon of Phobos. Power source we would like is an Sodium Fast Reactor breeder as we think this ...
1
vote
1answer
57 views

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, ...
9
votes
2answers
154 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 ...
13
votes
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 ...
7
votes
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
votes
2answers
193 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
votes
4answers
650 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 ...
4
votes
5answers
184 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.
0
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1answer
89 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 ...
5
votes
3answers
349 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 ...
-1
votes
2answers
162 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
166 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
0
votes
2answers
137 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 ...
12
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3answers
5k views

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 ...