Questions tagged [space]

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

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2answers
27 views

What would it take for a sky to remain completely violet or purple during the daytime?

I'm a fantasy author. I'm thinking about the setting in my next novel having something to do with a world that has purple skies during the daytime. I'm wondering how could this be done from a ...
7
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2answers
345 views

What would cause regular EMP bombardments on Earth?

In the SF/post-Apocalyptic world that I'm building, the Earth is struck by interplanetary EMP bombardments that destroy most electronics. The year is around 2040~50, and the tech level is bumped back ...
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4answers
139 views

Flash Flooding on Titan?

From what I’ve researched, Saturn’s moon Titan is believed to have a methane cycle throughout its seasons. Particularly, during the winter season, methane rain falls, filling Titan’s lakes and rivers. ...
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0answers
65 views

Electricity through space

Anything can be a conductor given the right circumstances, lighting is a good example of this, so when we eventually get a moon base or humans on Mars, could we transport electricity using space ...
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3answers
745 views

Is “asteroid rain” on the Moon a feasible concept?

In my story, a group of creatures lives on the Moon. I know that microlith striking the Moon is fairly common, to the point that EVA suits are built to compensate for it, but I was planning to have a “...
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6answers
3k views

Can I have sand in a desert that would make it impossible to differentiate between land and horizon?

I am looking for an end-result where one would not be able to differentiate between land and horizon. And I want it in a desert. So either some new, exotic material has to make-up the sand. Or it has ...
2
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1answer
114 views

Plants on a gas giant [closed]

I imagine that in my fictional solar system there is a gas giant which has bacteria-like life in it. Could plants eventually evolve in this gas giant? If so, what would they be like?
6
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2answers
289 views

Conditions at the 10AU border of an Active Galactic Nucleus

Imagine that a ordinary human being was suddenly teleported to a distance 10AU from the center of the Milky Way. What would happen to them (in terms of things like pressure, temperature, radiation, ...
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6answers
1k views

How can an interstellar empire prevent its subjects from obtaining advanced computer technology?

My interstellar empire, the Dynasty, draws some inspiration from the Gao’uld of Stargate. Encompassing the entirety of the Hyades cluster, it is ruled with an iron (or platinum) fist by the Sovereign-...
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2answers
172 views

Could one triple the moon’s mass without it colliding with earth if it was done slowly enough?

In my story, Earth is dead, and for religious reasons, humanity decides it needs to live on the Moon now. However, they want to triple the mass of the Moon to increase gravity to 5m/s or so. Assuming ...
3
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3answers
159 views

Would spacecraft suffer from fevers?

Spacecrafts produce a lot of heat, which must go somewhere if the inhabitants don't want to die. And in space, the only way to get rid of the heat is to radiate it away One way of achieving this would ...
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1answer
63 views

Could an alien learn human history from a time lapse of Earth?

If some alien or other organism placed a camera of some kind on the Moon’s surface and pointed it at Earth, and recorded video through all of human history, starting at the first evolution of Homo ...
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3answers
417 views

Where would be the most likely location for an early Mars base?

Quite simply, given considerations like radiation protection, locations of scientific interest, local resources for building construction, water, propellant production, mining, etc, what would be the ...
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10answers
2k views

What phenomena can explain not detecting a planet while detecting a more distant planet?

Humanity detects a very suitable planet, lets call it Vaung, that is roughly 80 years away from us with their current technology. A ship is made and sent to colonize it, same old stuff. The issue is ...
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5answers
2k views

Can nuclear intercontinental missiles be launched into space to destroy asteroids menacing Earth?

Wikipedia states that intercontinental ballistic missiles can fly a minimum of 5500 kilometers, can we shoot these missiles into space to reach beyond the thermosphere and explode on contact with an ...
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0answers
52 views

What type of calendar can use people after colonization of solar system and other stars? [duplicate]

I'm making game about distant future where people colonized space. They live at Earth, Moon, Mars, Venus, Mercury, gas giants moons and also on exoplanets. If I use Earth calendar, it will be ...
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2answers
105 views

Does the moon actually turn red during a lunar eclipse? [closed]

I feel dumb for asking this. I’m trying to make a scene on Earth’s moon where everything turns red, and I thought a good explanation for this would be a lunar eclipse, where the moon looks red from ...
6
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3answers
201 views

An oasis in the vacuum?

I'm hoping that the following scenario is one of those "you'll never actually see that so don't bother looking for it" things Because Reasons™ but I want to look at whether, and how, it is ...
13
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11answers
3k views

Why would space nations find more value in empty space rather than star systems?

In most 4x games, almost every space nation fights for star systems, planets, black holes, etc. The benefits are obvious: planets to colonize or mine from, solar energy, strategic positions and so on. ...
5
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2answers
316 views

Could medieval people build an airtight spaceship or space ark using their common resources?

This is set on a fictional alien world with medieval people. However, this world has alien livestock that are capable of flying into outer space and traveling to other worlds. These medieval-age ...
5
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4answers
213 views

How stealthed can a high speed projectile be for space combat?

High power projectile weapons, often firing their rounds near the speed of light, are a staple of sci-fi. Under certain assumption sets these weapons are valid, I'm not interested in the science (or ...
2
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3answers
168 views

What's a practical use for a gravity based magic system? [closed]

My magic system operates thusly - Using some kind of material, probably a special clay, maybe it's been changed by some kind of process, a magic user can shape the clay into balls of varying sizes, ...
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3answers
170 views

What would warfare look like on bodies the size of Ganymede to Europa?

As for more specific numbers these bodies are in the range of between the size of 2634.1±0.3km & 1560.8±0.5km in radius. The environmental conditions of them are that of the bodies of that size ...
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3answers
217 views

What would a human genetically modified to thrive in low gravity look like?

Really just what the title says. If a human was genetically reengineered (assume super-futuristic-magical level genetic engineering capabilities) for microgravity, what would be some likely changes? ...
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13answers
5k views

Does a space government make sense?

Mothership to space vehicle EU W2775LV be like "pay taxes!" Space vehicle EU W2775LV be like "no!" And flies away in the distance. On earth we are kind of stuck living with one ...
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1answer
101 views

How many habitable planets could our radio signals reach?

Taking into account signal attenuation. If there was anyone there to hear them. Only considering those signals already produced by us on Earth. Assuming the technology we have right now is available ...
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2answers
103 views

Would digitigrade legs be superior in low gravity for a bipedal organism?

all, I was reading another post on this forum about humans with digitigrade legs, mostly noting that they were relatively inefficient due to constant exertion to remain standing. On a planet with ...
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2answers
103 views

Could an organism exist in a vacuum just by temporarily “shutting off” and storing heat?

I’ve heard repeatedly that life in deep space is incredibly unrealistic, but I’ve had a (certainly scientifically stretched) idea for a race of ant-like creatures who live deep under the lunar surface ...
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2answers
4k views

space - Is there a minimum safe distance to watch a supernova?

Consider that humans now have technology to travel around the galaxy at will. Hyperspace, warp speed you name it. There is a distance in which they can watch a supernova as a form of entertainment AND ...
7
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2answers
181 views

Can I reasonably give a binary/double planet a strong magnetic field?

If there was a double planet with each mutual satellite being the mass of the Earth could they still maintain Earth-like magnetic fields despite being tidally locked to each other? Simulations of how ...
2
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4answers
343 views

How could a robot protect itself from solar flares?

How could a robot protect itself from solar flares? Especially that there is no close planet with a magnetic field. They are humans in a robot's body (cyborgs?) that choose to work in mining after ...
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3answers
764 views

Get out of the planet without fuel propulsion

Can electricity be used to propel aircraft out of the atmosphere and into space? If not, what other other options are there to get heavy stuff away from the planet? Why the question? Fuel is limited ...
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1answer
67 views

Tools for workshopping celestial body orbits

I am working on a scifi setting that mostly takes place among the moonlets and boulders of a gas giant's ring system. The humans living in this world travel slowly, in primitive spacecraft, between ...
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9answers
569 views

Is it possible to have lasers that travel slower than light?

In science-fiction, what are referred to as "laser guns" are usually just plasma weapons that travel slower than the speed of light. But I want to have actual laser - not plasma - weapons in ...
2
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2answers
169 views

Could humans survive in the solar system if the earth was destroyed? [closed]

In this setting humans have settled all around the solar system but the bulk of the population is still in earth however an asteroid wiped out all life. Now can humans sustain themselves with whatever ...
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7answers
228 views

Is water recycling really necessary in space?

Solar panels = energy Mineral harvesting machines= materials 3D printers that print solar panels= infinite energy So we got the energy part out of the way for space travel, just build more satelites ...
3
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2answers
103 views

How would a planet's (human) life adapt to inconsistent night duration?

I realise this question is rather broad, so I'll do my best to narrow down what I'm looking for as much as possible. The big idea The full daylight cycle on this hypothetical planet is consistent in ...
4
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5answers
719 views

Why do artilects don't interfere much in the conflicts of lower order sapients and vice versa?

In my universe there are beeing orders of magnitudes more intellegent and powerful than baseline humans and their transhuman counterparts. There exist a number of levels of mental power. These are: ...
2
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3answers
241 views

Could a terrorist organization or rogue state purposely trigger Kessler syndrome?

Assuming that a terrorist organization or rogue state has the capability of getting crude rockets up to orbit, could they trigger Kessler syndrome by detonating simple fragmentation warheads in the ...
6
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7answers
3k views

Why are ground troops necessary in intergalactic warfare [closed]

Problem: In a space-age war (with magic), why would ground troops be used, rather than just dropping orbital marines onto problem areas? Elaboration: So to set the stage, we’re dealing with wars ...
4
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1answer
121 views

What would a Haumea-shaped Moon look like from Earth?

Basically what it says on the tin, I'm writing a fantasy world and I'm testing some exotic types of moons for this one. Then I came across Haumea, a dwarf planet located beyond Neptune. Quoting ...
3
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1answer
249 views

How would a near light speed impact on Jupiter affect the planet and the solar system? [closed]

The object was originally "fired" as a weapon used from space to hit planets.let's say it is a long cylinder with a very high density and it was accelerated at some point to 90% of C. The ...
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6answers
1k views

Why would a sentient and super advanced species begin to think like humans over time?

I have a super advanced sentient species that is not human, and developing by itself on a planet. With such advancement, we expect them to think on a higher plane or at least in a different way to ...
2
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1answer
94 views

Can a mountain catch lightning and store that energy or become conductive?

Can we have a natural or man made mountain / hill of metal / ore that can catch lightning and become conductive so that it can be used as an energy source? What would be the expected energy output or ...
4
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2answers
169 views

What would be the energy requirements to run a world with an artificial sun?

What are the design requirements so an artificial Sun, which is basically a reactor using nuclear fission technology, can give enough energy to power the entire world? Especially on planets like Mars ...
3
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1answer
42 views

What are the limits on increasing atmospheric pressure on an ammonia planet to get liquid ammonia?

I have an ammonia world, I.e., ammonia is a solvent. It is tidally locked to its Sun. To counter low temperatures, I can either have a hot core or high atmospheric pressure. The size of plant is earth ...
2
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1answer
66 views

What will be solar eclipse on a planet with two Suns, no moons and tidally locked to one sun?

An earth sized planet in the habitable zone between two stars has no moon (and even if it has, it is not significant to the story) and is tidally locked to star A but not star B. Can it still have a ...
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2answers
103 views

Is it possible for an ammonia planet to have a desert spot? Like the great red spot on Jupiter. Or can an ammonia planet never have any hot spots?

I have an ammonia planet that I want to have a desert spot. A hot desert. Can I tidal lock the planet to it sun and let that particular portion be hot? Or is there any other way? Or is it never ...
21
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8answers
5k views

Can an asteroid go through the sun?

I'm looking into a story where the Earth is hit by an asteroid going very fast. This must be a complete surprise and I want to go a mile further than just giving the entirely valid solution of it ...
4
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2answers
174 views

If you Open a 1-m Radius Portal Between Earth and Deep-Space, Will Equilibrium Be Reached?

After I looked through this question, I had one of my own. I can think of no real reason why a portal does not also allow the gravitational field through. So we suppose that the portal does, in fact, ...

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