Questions tagged [galactic]
For questions about galaxies (massive, gravitationally-bound groups of stars) or objects and systems that span a similarly large scale.
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At what speed does the Cosmic Microwave Background radiation become lethal
Background
Far future humanity has set its sight on widespread inter-galactic colonization. Due to advancements in a variety of technologies, the ability to move at an arbitrarily high fraction of the ...
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How completely would an empire having a near-monopoly on precious metals be able to manipulate the galactic economy?
In my series, there's this empire called the Aurean Dominate that controls the entire Planet Aurea and a handful of outlying territories on nearby worlds. On this Planet Aurea is the Monsaltu Range, ...
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How can I destroy the Milky Way Galaxy?
The title is pretty self-explanatory. How can I unmake an entire galaxy? In this case, the aforementioned galaxy is ours. I have no constraints on budget, materials, time, or technology. However, I ...
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How can I make a 2D FTL-lane map on a galaxy-wide scale?
I want to finally get around to actually making a map for my Sci Fi worldbuilding project I have been slowly working on for the last few years. For context, this setting takes place in the Milky Way ...
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How did the bugs get all over the place?
Very common trope in action/horror science fiction: insectoid aliens. Especially common as an enemy, since people naturally dislike ants and spiders and creepy crawlies in general; see the Galactic ...
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Would an increase in star density affect the "Goldilocks Zone"?
Let's say that there's a solar system that matches the description of Sol exactly, save for the fact that it's 20,000 light years closer/farther to the galactic center.
Would the zone of one ...
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Detectability of a Type III Civilization with a specific set of conditions
Conditions:
The civilization is in a galaxy which is not the Milky Way. For the purposes of this question, assume the target galaxy is 0.5 Mpc away.
The civilization has elected, for whatever reason ...
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How Much of the Universe Could Humanity Conquer?
Imagine that less than a million years from now, probably in the hundreds of thousands, humanity has spread throughout the galaxy. There are afew aliens here and there, but that is insignificant, they ...
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How to map arms of the galaxy?
Some background:
My interstellar civilization(s) have fled our home Solar System, spreading throughout the nearby systems in the Orion Arm. They possess FTL, but for plot reasons, they have only just ...
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what cosmic event could teleport a solar system? [closed]
In a project I am mulling over, humanity now inhabits the dense core region of a globular cluster. They did not colonise this cluster; some cosmic event actually teleported the sun, moon and earth (...
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How large can the main disk of spiral galaxies get? [closed]
I'm asking how large (by which specifically I mean diameter in light-years, though a rough estimate of the number of stars would be appreciated) can the main body of the spiral galaxy get.
I'm ...
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Can a larger mass of stellar engines move a galaxy's dark matter?
There have been ideas about moving galaxies, if all of the needed stars and black holes become stellar/black hole engines but due to the 1:5 ratio of matter and dark matter there will not be enough ...
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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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How to Create the Galactic Habitable Zone
Our galaxy consists of a wide number of stars, anywhere from 100 to 400 billion stars, with just as many number of what are known as "habitable zones", in which liquid surface water is ...
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Is it possible for a future civilization to concentrate the galaxies (or some of them) of the universe?
In the world I describe there is not much time left before the expansion of space takes its toll. Galaxies are already accelerating away from each other on a negatively curved spacetime. The expansion ...
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Does This Geopolitical Power Balance Make it Look Like I am Promoting Colonialism? [closed]
The book series I'm working on can basically be summed up as a science-fantasy series that starts out leaning much more on the fantasy end of the spectrum (the first few books could best be described ...
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How to calculate the time on planet B for an event that happened on planet A?
We have had a number of "universal time" questions on this site — basically the various OPs have been looking for a way to establish a single time reference for the galaxy. I believe that's ...
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How would a K3 civilization collect the majority of the universes available mass in the form of Intracluster gas?
My story at its final stages is based around K3 civilizations whose technologies are within the known laws of physics and for plot reasons have managed to control all superclusters and lone galaxies ...
user78658
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How could a galaxy be altered to house hundreds of thousands times more Stars?
It has been said that humans are capable of reaching up to a billion light years away before expansion has taken those galaxies permanently
out of reach without FTL methods.
I aim to have a ...
user69935
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Can a galaxy be formed from a black hole?
I'm writing creative text and I'm curious to know, just as possibility, can a galaxy by any chance be formed out of a black hole?
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How far above the galactic plane could an Earth-like planet develop?
I was zooming around on Space Engine and came across the moon of a gas giant that was hovering well above the galactic plane. I'm admittedly not well-versed in under what conditions an Earth-like ...
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Could habitable planets form in an ultracompact galaxy?
I am wondering if habitable planets could form around stars in super dense dwarf galaxies. There are some super dense galaxies such as M60-UCD1 and M85-HCC1 which can have a typical distance between ...
user69935
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What would the view from a spaceship traveling through inter-galactic space look like?
My character is traveling aboard a spaceship through inter-galactic space (it has left the Milky Way). The ship is traveling at the speed of light or so and has been for the last six thousand years. ...
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Randomly generating plausible star types for a synthetic galaxy?
I'd like to randomly generate between 1 and 20 million stars for a spiral galaxy resembling our Milky Way. This is of course far fewer than our galaxy (estimated between 150 to 300 billion), but I'd ...
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Universal calendar creation for intergalactic empire [duplicate]
In my novel, I have created an intergalactic empire that predates humanity by millions of years. The only system I am having a difficult time creating, for this empire, is a Calendar system that ...
