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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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2answers
998 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
77 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
235 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
119 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
523 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
123 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
47 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
133 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
59 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
585 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
557 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
76 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
274 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
220 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
86 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
134 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
189 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 ...
6
votes
3answers
217 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
381 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
137 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
102 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 ...
2
votes
2answers
105 views

Could DNA Survive in Outer Space?

In my story the inhabitants of Earth are near extinction. They want to make a capsule of a bunch of human DNA and blast it toward the Andromeda galaxy. They take 1 oz of every blood type still living ...
8
votes
7answers
1k views

How can an individual with Superman like powers best harvest asteroids?

In a story I am writing there is a being with Superman level strength, flight, the ability to produce lasers, and survive in space. He has decided to solve the mineral crisis by finding and grabbing ...
0
votes
0answers
51 views

Would a spaceship be able to be stealthy , if it were hidden behind an asteroid in a planetary ring and running on low power? [duplicate]

Let's say I have a spaceship I want to hide. If the ship had her lights, engine, reactor and non-essential power consuming modules turned off, is covered in a camouflage that reflects light like an ...
13
votes
3answers
330 views

Could you carry a wormhole through another wormhole?

Okay, let's assume that travel between star systems is done through stable, stationary wormholes on the outer boundaries of each system. This alone is slightly magic for now, of course, but let's roll ...
5
votes
2answers
304 views

How long does it take for biological matter to decay in space?

I have been looking up a few different theories lately. And one of those is the idea that intelligent life cannot exist for any long period of time without eradicating itself or being destroyed by ...
9
votes
4answers
2k views

Desert planet with forests at the poles

I'm thinking up a Mars or Venus type planet where the poles (or one pole) has a forest growing out of it due to a device that is used to make the planet more habitable by creating a oxygen friendly ...
2
votes
5answers
280 views

Would a superintelligent-AI prefer being based on Earth or on the Moon? [closed]

Let's assume in a near future humanity and a superintelligent-AI (created by humans, but now independent) have a sort-of-friendly relationship, to exclude all military-related factors. Would the AI ...
4
votes
2answers
58 views

Stellar and magnetic parameters for creating polar radiation hazards

I've got a generally earthlike planet, but my goal is to make radiation exposure in the polar regions a much larger hazard than it is on Earth, while not being an issue in other regions. Nothing ...
0
votes
2answers
85 views

Effects of long term exposure to a non-earth like rich atmosphere

Imagine that humanity found a rocky planet with earth like gravity, atmospheric pressure, and temperature, orbiting a sun-like star. The only problem is that the planets atmosphere is that it is ...
44
votes
8answers
10k views

Is it harder for an intelligent octopus to live on land, or a human to live in space?

I have a race of octopodes with the same intelligence distribution as humans. I want them to “colonise” land to a similar extent as we have “colonised” space; have regular transport between the ocean ...
21
votes
11answers
7k views

If the SUN of our planet was the same size and proximity of the moon, would it still work as usual?

I'm building the world of my story for my comics and I've come to a bit of a standstill with a particular idea. Assuming there were no other planets in our universe, just a single planet Earth. The ...
7
votes
3answers
433 views

Practicality Of Orbital Fusion Reactors for Power

Much of the struggle with terrestrial fusion power seems to be with keeping the ultra-hot plasma contained. In a classic Tokamak configuration, magnets using massive amounts of power, suspend the ...
5
votes
1answer
66 views

How might an astronaut in a vacuum create an electrical field sufficient to affect a cloud of particulates?

My protagonist is in a sticky situation: floating in space (fortunately in a spacesuit) and about to be attacked by an alien avatar made from smart matter; tiny specks of dust which share a ...
4
votes
4answers
218 views

How long would it take a matter-antimatter GeV gamma ray laser photon rocket to get to Ross128b (11 light years away)?

I'm writing a colony story, and I want my ship to colonise Ross128b, which is 11 light years away from Earth. I need the characters to be alive when they get there, but it's okay if they've aged ...
4
votes
2answers
178 views

How much heat would a 1km asteroid release into earth's atmosphere?

I am writing a theory for a game that is in an apocalypse. An asteroid is heading for earth and will crash into the earth regardless in this theory. It is 1km in size but due to the YORP effect it has ...
18
votes
8answers
6k views

Is a red sea on a habitable world scientifically possible?

I have an idea that the seas of a world are red, not blue. However, the world should also be the birthplace of an intelligent alien species. Would it be scientifically possible to have a world with a ...
4
votes
9answers
325 views

Could this planet exist?

I've been thinking of a planet where the day/night cycle is way off to where there 30-35 hour long night period, while there are only near 8-4 hours of daylight. The local biological environment is ...
9
votes
5answers
698 views

What are ways a horned alien race could wear space helmets?

I've already considered that they may file their horns down, but keeping in mind that their horns gradually regrow, it is an inconvenient solution. This is what their horns typically look like: ...
16
votes
5answers
2k views

Would carbon-based lifeforms be able to eat silicon-based lifeforms?

In the South Galaxy, the overwhelming majority of life lives on planets, breathes air, and is carbon-based. All sentient life is carbon-based. However, in the vast reaches of space, there are some ...
2
votes
4answers
140 views

Day/night cycle science help?

So I am building a world but need help with its day/night cycle and the science to make it work. The planet has a 32 hours day cycle, however there is only 10 hours of light a day. This planet is ...
0
votes
2answers
105 views

Use for a giant in a space military?

In this story I am writing, I am trying to figure out a place for a giant race in a military for a galaxy-spanning civilization. We'll call them Meat Boys, for joke sake and namesake. ...
5
votes
6answers
189 views

Is it possible to “Smell” in Space? Viable Equivalents?

I am currently creating a Spacefaring Race that regularly travels between planetary systems in order to harvest resources, but due to the fact that the conditions required for them to Breed are fairly ...
41
votes
32answers
10k views

Why would a previously spacefaring civilization become unable to build another interstellar ship?

I'm writing a story in which a civilization previously capable of (firmly technobabble-based) FTL travel has become stranded, orbiting an isolated star with no rocky planets. (There was a planet, but ...
2
votes
2answers
113 views

Artificial satellite in a Binary Star System

Is it possible for an artificial satellite (in this case, an unmanned communications platform) to maintain a stable orbit directly around the barycenter of a Binary Star system, as in well inside the ...
60
votes
24answers
12k views

How could a planet have a sky without stars at night?

Is it possible for a planet in our part of the galaxy to have a night without stars? I'm looking for some kind of natural phenomena that would hide the stars, but allow the sun to rise and fall as ...
9
votes
6answers
3k views

Would this design be useful for surviving relativistic impacts?

Let's say that I've developed a new engine that can accelerate at 1G continuously. Within about a year, I'm nearing the speed of light. Naturally, I recognize the danger of collisions with gas and ...
6
votes
1answer
340 views

Does my plot point centered around eclipses make sense?

My main antagonist is an infant Great One that's been imprisoned below the Moon's surface and I want its influence and physical form to have a weakness to direct sunlight which, I think, gives me a ...
2
votes
4answers
161 views

How can a wealthy and enlightened minority manage to create colonies on Mars and cheapen space mining in a world of mysticism?

Key setting elements and questions: In this scenario, A large majority of the population: Supports spending more money on religion than on the space colonization program. They are middle class: ...