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Questions tagged [space]

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

10
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1answer
118 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 ...
10
votes
6answers
1k views

Could there be something like aerobatic smoke trails in the vacuum of space?

Whether exhaust from a solid rocket engine, or something released by spaceships in flight (like aerobatic smoke in the atmosphere), could extended trails behind a ship be created that would not ...
0
votes
1answer
89 views

How close would a planet need to be to its star to be dangerous but still habitable with thriving civilisations? [closed]

I'm creating an alien species and want to have them a bit too close to their star but of course, don't want to kill them. They're not very advanced technology wise but they have powers caused by ...
28
votes
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 ...
11
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3answers
1k views

Would the rotation of the starfield from a ring station be too disorienting?

The Coriolis effect on a ring-shaped space station gets the most attention, but disregarding that, would the rotation of the starfield be too disorienting? A 1km radius station at 1G simulated ...
55
votes
30answers
12k views

My perfect evil overlord plan… or is it?

Me You might call me evil but the facts are I deserve to rule all of the world, everyone & everything in it. What I already have done For years I have worked in the shadows (as much as you can ...
15
votes
5answers
3k views

How could a civilization detect tachyons?

In an effort to work out a believable form of faster-than-light communications for my setting, I've ruled out a few things: wormholes (which are in use, but are too random in where they lead, to be ...
14
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5answers
2k views

What calendar would the Saturn nation use?

In my next novel, there are three major powers in the solar system: Earth, Mars, and Saturn. Earth runs on a slightly modified Gregorian calendar, Mars goes with the good old Darian calendar, and ...
0
votes
3answers
333 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 ...
26
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17answers
6k views

Justification of physical currency in an interstellar civilization?

I have seen a similar-ish question on here, but it doesn't quite match my inquiry. Suppose you have an interstellar civilization (the means of travel between stars being stable two-way wormholes on ...
5
votes
2answers
475 views

Could a brown dwarf in our outer solar system remain undetected today?

We've all heard the on-again, off-again theories of another massive object in the vast reaches of the outer solar system. Some potential evidence to support the possibility are its affects on smaller ...
4
votes
1answer
124 views

What sort of atmosphere would develop around an asteroid colony?

In the not too distant future, mankind has established several mining bases on Ceres. There are a lot of spaceships which come and go. Large mining machines are chewing up the interior for resources. ...
5
votes
2answers
204 views

Is it possible for a space city to exist in and draw power from a nebula? Any side effects?

For context, this takes place about 300 years in the future. The space city in question is located in a nebula, completely man-made (not build upon any preexisting foundations like an asteroid etc.), ...
9
votes
8answers
1k views

Desert poles but arctic equators; trying to find out if specific way is possible

I'm trying to create a planet with a hot desert north and south pole but a cold equator. Is this possible? and if so how? And if it's heavily related to space how would night and day work on this ...
-6
votes
1answer
117 views

Insterstellar Psycho - What damage can he do? [closed]

The Interstellar Psycho just wants to cause damage to others. He regularly shoots intense laser bursts in all directions into space from his base on Earth's Moon. He sends one every hour. Question ...
8
votes
4answers
2k views

Farming on the moon

Let us assume that I built a dome on the moon's surface. That dome is pressurized and has nuclear-powered lights to deal with the long lunar night (or is in one of the poles). I also have water, ...
6
votes
1answer
115 views

Feasibility of Thermoelectric Metabolism

Larry Niven's "Known Universe" (KU) features "The Outsiders" as one of its most prominent alien races. As per KU canon, the Outsiders evolved in a frigid moon (similar to Nereida) and they sustain ...
0
votes
1answer
54 views

Plausibility of “diamond”-like crystal and/or mineral substances forming on a planet orbiting a dwarf star

Alright, so the primary inspiration for this is 55 Cancri e, the speculated carbon "diamond world" and to a degree, Nkllon, a planet in Star Wars that is essentially what Cancri is, but "confirmed" to ...
5
votes
3answers
162 views

Plausibility of purple oceans

Alright, so I've been meaning to write out a planet with golden/yellow fields and a violet / purple ocean. What I was thinking about is having the water of this world is so clean and nourishing that ...
3
votes
3answers
146 views

What might be the nature of interstellar warfare given access to instant communication and Alcubierre drive technology? [closed]

The title really speaks for itself. Given what we know about Alcubierre drives (and yes, I know they're extremely hypothetical, but for this question let's just assume they can exist as we currently ...
23
votes
17answers
8k views

Can an alien society believe that their star system is the universe?

Throughout history, humanity has made a few scientific blunders where a scientific principle held as fact for hundreds of even thousands of years is found to be completely or mostly false. Our ...
-3
votes
3answers
225 views

Are atoms present in the vacuum of space?

I'm currently writing this story where an intelligent lifeform, instead of human eye-sight, is able identify the chemical composition of their surroundings, by detecting and "mapping" all the atoms ...
2
votes
5answers
217 views

Can multiple similar planets share the same orbit without interfering with each other too much?

Let's go with an example. Three planets, all of roughly earth's size, follow the same orbit around a star with a mass of roughly 1 sun. Basically, all three planets are almost identical to Earth, ...
0
votes
2answers
84 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 ...
2
votes
0answers
74 views

Humans separated by two terran planets one 0.8g, other 1.4g [closed]

I am writing lore for a project and am mostly clueless about gravity's effect on human beings in these circumstances. The brief history is that bronze/iron age people had access to "primitive" ...
11
votes
4answers
1k views

What factors affect how many moons a planet can have?

A moon is just a natural satellite - something orbiting a planet - so I'm interested in what kind of factors influence how many moons a planet can have, and how many moons a planet will actually have. ...
40
votes
3answers
9k views

Is there any reason not to eat food that's been dropped on the surface of the moon?

Are there any kind of contaminants or other reasons that might be dangerous? I'd assume that as far as microbes/bacteria goes, eating off the ground on the moon is much safer than it would be on earth....
4
votes
7answers
240 views

What kind of sports would be possible in zero to low gravity?

The Hegemony wishes to organise not only terrestrial games within the inner colonies, but has also wished to establish major sporting events for the other colonies in low gravity environments on top ...
10
votes
2answers
1k views

Existence of a celestial body big enough for early civilization to be thought of as a second moon

Is there a possible scenario in which once a year a celestial body can be seen from the surface of the Earth-like planet for a short period of time? With it being big enough for early civilization to ...
0
votes
2answers
106 views

Humans under different suns

What would humans look like if they were genetically suited for life under a giant orange star like Iota Draconis ? These would be people who were genetically indistinguishable from humans from earth, ...
4
votes
3answers
258 views

Use bomb to detonate a white dwarf?

Suppose there is a Sirius A based alien civilization, but their planet is heavily defended, so direct attack is useless. Could we use some kind of weapon to detonate the Sirius B and cause a disaster ...
8
votes
1answer
126 views

Planet with big axial tilt, but very close to its star

It is known that when a planet orbits very close around its star, the tidal effects will soon (on an astronomical scale) force the day and the year of the planet to have the same length, making the ...
8
votes
6answers
552 views

How to design an organic heat-shield?

When they started dropping from the skies.. or no, they landed. They were so similar to us, yet so different. Like nothing we would've ever designed or created - but so much like everything ...
0
votes
2answers
125 views

Can a human born & raised in zero gee survive on a earth like planet for a short while

I've been toying with an idea of a epic space fantasy where a certain area of the milky way is controlled by decedents of humanity that are born, live & die in spaceships, said "ngees" as the "...
5
votes
2answers
62 views

What would Define Ecosystems in a “Frozen Moon with Ocean” World

What factors would influence ecosystem development in an ocean on an ice world? It is thought that several moons in our solar system (e.g. Europa) may have significant oceans under their icy crusts. ...
36
votes
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 ...
0
votes
4answers
146 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 ...
1
vote
1answer
68 views

Understanding the daily life and function of officers in a space navy [duplicate]

In the process of world-building my space opera's allied navy, I realized I really need to know more about what the functional roles of some of the officers aboard ship are; you know, not just their ...
5
votes
3answers
601 views

How would an EMP affect spacesuits (and small-arms weapons)?

Since most online and media depictions of EMPs run the gamut from devastating annihilation (complete with sparks shooting from every angle) to gentle shutdowns resulting in inconvenient repairs, what'...
3
votes
4answers
695 views

Could black hole civilizations even exist?

I know that currently, black hole civilizations are only theoretical. But here are my thoughts on why black hole civilizations are impossible. Black Hole Civilization Issues 1. Gravity This is an ...
4
votes
1answer
81 views

I'm trying to create a planet with a purple sky, human life on planet not necessary [duplicate]

I think that it could be possible with a red sun, and either massive oceans containing algae or a surface covered with active volcanoes. What would my atmosphere be made of, and what color would those ...
1
vote
1answer
300 views

Can a black hole be turned into a white hole?

Following the Schwarzschild metric, we could consider that a white hole=black hole with no angular momentum (no spin?) or electric charge. Would be enough to slow down a black hole and somehow remove ...
5
votes
2answers
225 views

What's the biggest, most spectacular asteroid collision the moon could save us from?

An asteroid collision big enough and fast enough to see a massive ejection of rock and moon-chunks, from the surface of the earth AND not wipe out the population of the planet. What size and speed of ...
-4
votes
1answer
91 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 ...
-2
votes
2answers
157 views

Help with military structuring [closed]

I'm building a military for this sci-fi book I'm writing, and I'm struggling with the hierarchy of command this military should follow. At this point, I'm just worried about the planetary forces, ...
3
votes
1answer
195 views

Carrington Event Shield

If a nascent colony world can be wiped out by a geomagnetic storm on a scale similar to the Carrington Event, what could the colonists build either in space or on planet to protect their electronics ...
7
votes
3answers
298 views

Effects of Explosive Decompression on the Human Body?

Many science fiction stories, movies, and shows involve characters undergoing explosive decompression, the technical term for a rapid drop in pressure, usually all the way to a vacuum. Frequently, ...
5
votes
7answers
392 views

“Landing” a small asteroid on Earth

I've been poking around similar posts, but none seem to contain the information I'm looking for. I'll try to keep it brief. In the year 20XX, some powerful organizations are trying to "land" an ...
3
votes
1answer
157 views

Mining Metallic Hydrogen

The Hegemony is in need of superconductors for their fleets of stratospheric craft (stratocraft for short) as well as many, many, many other applications. I recently read metallic hydrogen is a ...
1
vote
2answers
111 views

How Long Would Interstellar Expansion Take at Our Current Population Growth in This Circumstance?

FTL (Faster than Light) travel exists,taking around 88 hours 48 seconds to travel 1 light year. FTL communications also exists and takes only 53.28 seconds to travel 1 LY (Light Year). Jumps longer ...