Questions tagged [space]

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

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5
votes
2answers
272 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?
11
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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 ...
12
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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
140 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 ...
1
vote
0answers
133 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 ...
7
votes
6answers
2k views

How to maintain a closed environment for one person for a long period of time

Background: In the early 2020s a magical life-extending "elixir" is created but is in short supply. However, a very reckless individual steals most of the US's supply and drinks a sufficient amount of ...
24
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12answers
7k views

Can an escape pod land on Earth from orbit and not be immediately detected?

I'm writing a soft scifi novel that has its fair share "fi" but every now and then I feel it important to acknowledge some "sci." In this scenario, a spaceship is in orbit and about to land on ...
19
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2answers
2k views

What would the consequences be of a high number of solar systems being within close proximity to one another?

What would the consequences be of a high number of solar systems being within close proximity to one another? I'm mainly interested in the consequences for life on multiple planets. When I say 'close ...
4
votes
4answers
277 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 ...
11
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5answers
2k views

If you had a giant cutting disc 60 miles diameter and rotated it 1000 rps, would the edge be traveling faster than light? [closed]

As if there was a giant angle-grinder in space that slowly increased its speed. The question assumes that material exists to make this super-disk that doesn't rip apart. What happens as the edges ...
27
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5answers
8k views

Building a road to escape Earth's gravity by making a pyramid on Antartica

If you have miles of steel pipes 10m thick, could you pump water from the sea to the centre of Antarctica, then pump it into the air like a geyser so that it falls around the pipe. As the fallen ...
10
votes
7answers
454 views

In an interstellar/interplanetary civilization, which would be most common/cheapest in the market: Plastic or metals?

Considering that oil is only really prevalent on earth (where dead biomatter can be compressed over millions of years into long hydrocarbons) I began to think that plastic might be just as rare as ...
7
votes
1answer
141 views

Heating a gas giant's moons in a red dwarf system

Being new, this is my first question. I've read some other posts that gave me valuable insight, but I still have some questions. First, some specifics: Star: red dwarf. 80 x jupiter mass. 3 billion ...
10
votes
1answer
148 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
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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
107 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
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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 ...
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 ...
58
votes
30answers
13k 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
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3answers
346 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
486 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
135 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
208 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
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1answer
125 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
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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
124 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
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1answer
58 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
184 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
158 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
18answers
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
228 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
226 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
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 ...
2
votes
0answers
76 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
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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
245 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
109 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
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3answers
264 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
132 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
555 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
134 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
63 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
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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 ...