Questions tagged [time]

For questions about the standard passage of time on objects/people/civilisations etc. Also consider the [time-keeping], [spacetime-dimensions], [alternate-history], [universe], [time-travel], or [time-manipulation] tags.

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32 answers
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Is there any reason why The Chosen One should bother to do anything if their victory is prophesized? [closed]

Assume the prophecy says that The Chosen One will defeat the DARK OVERLORD. The spell of the prophecy is always accurate and has a 100% chance of being true. This has been mathematically proven and is ...
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2 votes
3 answers
191 views

Would it make sense for an Interstellar government to use the half life of common radioactive elements as a measure of time? and to make calendars? [closed]

For example, can we use the half life of Polonium or Uranium to measure time and produce something similar to a calendar?
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2 votes
3 answers
248 views

how would you call a star when referring to a "sunset" or "sunrise" [closed]

So, I've been developing a worldbuilding project, and I have an issue with this one planet's star, the planet it's called Xin Anhui, that means "new Anhui" a province in China, based on the ...
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12 votes
11 answers
3k views

Measuring Time in a World Where the Sun Never Sets

First time here, so I don't know what to expect. I'm writing a dark sci fi mystery story that takes place on a hypothetical megastructure called an "Alderson Disk" (Example seen Below). ...
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12 votes
8 answers
1k views

How can a country devote centuries of resources to building giant mechas without being stopped?

There is a world where giant monsters the size of mountains come every few hundred years and destroy huge amounts of the world and any organized civilization of humans. The only effective response ...
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12 votes
8 answers
2k views

How would an underground society measure time? [duplicate]

I have a very mind-boggling question about time reckoning. I have a race of Dwarves, that at the very beginning of their history lived only underground and were forbidden to reach the surface. They ...
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4 votes
7 answers
275 views

Creatures which can be mortal in one dimension and immortal in another dimension, How do I avoid time freezing forever?

These beings can live a normal life, except they switch dimensions, their body still remains in the same place. But almost as if time froze, they are transported in another world, an infinite ...
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12 votes
15 answers
3k views

How do Time Keepers log their diaries?

Set in distant future, a group of super advance civilization formed a special task force to observe and guard timelines, and they are called Time Keepers. The Time Keepers will scan for spacetime ...
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2 votes
2 answers
138 views

How can the number of inconsistencies within a universe increase with successive patches?

Gods are all powerful beings who are eternal and have existed within the past, present, and future of a universe's timeline. However, every god also had a beginning. These beings were once mortals who ...
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2 votes
5 answers
151 views

A 24 hour day with less than 24 time zones

I'd like to have a world similar to earth in it's day cycle, meaning a 24 hour day measuring hours the way we currently do. However, due to the planet's size, I'd like there to be less than 24 time ...
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4 votes
5 answers
271 views

How can telepathic communication work across different time periods?

Gods inhabit a realm parallel to the mortal plane known as the warp. These beings are effectively made up of warp energy condensed into solidified form. They can enter the mortal plane through an ...
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2 votes
1 answer
134 views

How Should I Make a Calendar for Trappist-1

Alright, so I have already asked a few questions about this system, but this is the most important one. Firstly, I am needing to see if I got a relatively simple math problem right, and then I need ...
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3 votes
4 answers
215 views

How could a time paradox caused by a manufactured deity fail to produce a full retcon of history?

The Leviathan https://villains.fandom.com/wiki/Scarlet_King is an entity formed as the manifestation of the tension between the modern world and the pre-modern world and the rage it creates. ...
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-2 votes
1 answer
104 views

Indicators of Ai Super Intelligence [closed]

Given the certain state of Ai, what indicators would show some level of ‘Super Intelligence’? Here are some of my ideas of 'Super Intelligence' this is subjective, of course. Able to operate on ...
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9 votes
2 answers
240 views

Reality Check: Controling time to produce velocity

Background I recently had some fun watching YouTube videos about redefining the nature of gravity based on the existence and flow or "velocity" of time. (Example) and it got me thinking of ...
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16 votes
11 answers
3k views

What would the scientific explanation be for an energy source that can last 130,000 years?

I am playing with the idea of an alien ship landing on earth 130,000 years ago. Over time it's covered up with water and sediments and is eventually discovered in modern day. It contains numerous ...
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5 votes
3 answers
129 views

Small space of slow-down time

I am aware of this question: Speeding up time? My question is about the opposite effects. Specifically, I want to describe the results of using the time altering device create by the Great Race of ...
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11 votes
12 answers
7k views

How can I store energy/data reliably for 300 million years?

Following this question: How can I implement time travel on a somewhat realistic way? Considering I have a way of getting energy into the past (as said on the previous question), I need a way of ...
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1 vote
1 answer
96 views

It is possible to slow down time without a Black Hole? [closed]

Well, I saw a interesting question in other sites and it made me wondering. Since cryogenics and hibernation aren't exactly that easy, and colony ships that travel through the eons in space carrying ...
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  • 151
2 votes
2 answers
287 views

Slowing time, slows gravity?

I'm designing a character that can slow time in an area around him/her. The living things in that area perceive time normally, so they see this character and the things out of that area moving very ...
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  • 129
15 votes
6 answers
3k views

How would people in Medieval times react to the clothes worn by a time traveler coming from the present day?

My heroine (accidentally) travels through time and finds herself in a medieval setting (a forest in e.g. 1100). The only things that time traveled with her, are her clothes. At first she gets lost in ...
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  • 181
1 vote
1 answer
122 views

Could a pebble-bed reactor provide sporadic power for millions of years?

The device needed is a monitoring system. Aliens leave a probe on Earth or orbiting Earth, which typically lies dormant, but it awakes every 1,000 years or so to check life's status on Earth. There's ...
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  • 171
1 vote
0 answers
53 views

Seeing the future [closed]

Is it possible to distort time without a black hole and see all, in one instant, see everything all at once, future, past and present? And if it was possible to see the future, how would it really ...
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7 votes
11 answers
1k views

What benefit would a deity gain from spreading out a conflict over a long period of time?

Nyarlathotep, the Black Pharaoh, is in ancient conflict with other elder gods in his weight class, and seeks to enter the realm of Earth to rule over mankind. Unfortunately, he is prevented from ...
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0 votes
0 answers
42 views

Single Time Zone in a Galaxy [duplicate]

This follows up the Single Time Zone on a spherical planet. Suppose now we have many habitual planets in a Solar system or in a Galaxy. How does it work to set up a Universal Time? Will it be ...
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8 votes
4 answers
859 views

Single Time Zone on a spherical planet

I am particularly interested in the case of feasibility to have all countries and all regions of our planet, the Earth, to have a unified Single Time Zone (say UTC). Suppose all countries and all ...
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9 votes
5 answers
3k views

How would I coordinate meetings with people on Mars?

First off, assume faster-than-light communication exists and has enough bandwidth to do video conferencing. This question wouldn't even be relevant without faster-than-light communication since it ...
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  • 2,687
3 votes
1 answer
160 views

How long would it take for a group of settlers to form a new civilization

In my world, sometime before the main events of the story, a group of about 100 explorers set out to cross the uncrossable mountain range that divides the continent and venture into lands unknown. ...
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1 vote
4 answers
265 views

How would units of time be measured on a planet with a binary star system?

The days are long approximately 25 hours of daylight and 5 hours of darkness. There are two stars. The first star rises like the sun. The second star tracks the horizon. (I'm prepared to hand wave the ...
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4 votes
1 answer
184 views

Plausible age for the ruins of a modern city skyline

The setting is some indeterminate amount of time in the future. Humanity has had a rough recent history being rocked by wars, disease, and natural disasters and the current iteration of civilization ...
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0 votes
2 answers
96 views

Universal Time | Time in Space seen by Intelligent Life Forms or Aliens [duplicate]

How would several intelligent life forms, aka. Aliens or Foreigners to us, who roam around space (in something I would call space ships) and have never seen or heard about earth interpret time? How ...
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  • 501
4 votes
9 answers
988 views

Is 30 years long enough to remove all evidence of the United States of America? [closed]

In my story which is taking place in 2050, there is no United States of America. The only reference to the USA is an old military bunker where the characters are currently hiding. Is 30 years long ...
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2 votes
0 answers
55 views

How long would daytime and nightime be on a planet with a 26 hours rotational period? [duplicate]

The basics about the planet in question: As the second planet in the star system, it's somewhat warmer than Earth is. The rotational period is 26 hours and the orbital period is 312 days which ...
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3 votes
3 answers
139 views

Can a person step into a time rip and age rapidly without their clothing aging? [closed]

I have a character who has pierced the dimensional membrane (that’s what I’m calling it) around our universe/world seeking a new form of energy. In the process he created time bursts—-quick flashes of ...
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2 votes
4 answers
188 views

How long would it take to make three hundred spaceships and an orbital defense system? [closed]

I'm about halfway through a story I'm writing, where aliens invade, beat us up, one spaceship blows them all up, etc, etc, and everyone lives happily ever after. Except they don't. So after they chase ...
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7 votes
2 answers
204 views

How long could late medieval-like architecture survive without humans to maintain it while they were in a magical sleep?

I'm bouncing ideas around in my head for the story for a game I'm planning. I wanted the world to be one where humanity was re-emerging from a magical slumber and setting out to reclaim the world. ...
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  • 2,866
-1 votes
1 answer
126 views

A Good Gift for a Medieval Worker? [closed]

I'm a time traveller, and on my last trip back to the 1300s I befriended several of the locals. One is a fairly wealthy farmer, and the other is the village blacksmith. Now, since they helped me when ...
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3 votes
2 answers
70 views

Tidally locked time keeping 2 [duplicate]

I have done some research and so much contradict one another or I simply fail to understand. Can a moon be used as accurate time keeping and is it possible for it to revolve around the planet once an ...
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15 votes
15 answers
4k views

Could agriculture still be developed by intelligent species that lack the concept of past and future?

Imagine somewhere in the universe there is an intelligent species that is as intelligent as our stone age fore-brothers and sisters but will never establish the concept of past and future events. ...
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1 vote
2 answers
65 views

Durability of materials in ideal conditions

How long can objects made of hard material last at room temperature in otherwise ideal conditions? If left outdoors on Earth, over the course of millions of years, any material will be eroded by wind,...
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  • 4,418
-2 votes
1 answer
116 views

A new type of paradox? [closed]

Imagine we had this incredibly powerful computer that can simulate our universe, and that we somehow knew the initial conditions of the big bang (or the planet earth) down to the exact detail. Fast ...
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1 vote
1 answer
97 views

How do I calculate the total time dilation experienced by an accelerating ship?

My advanced human civilisation often has high-acceleration ships travelling at near lightspeed. I know that time dilation would have a significant effect on the time experienced by the crews, but I've ...
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0 votes
1 answer
110 views

Civilization going backwards. How to? [closed]

When we talk about civilization rollback, it's usually some kind of post nuclear war scenario, where everything is in ruins but the knowledge isn't lost. After some huge catastrophe, we'll still have ...
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14 votes
9 answers
4k views

Would a single solar system be able to come up with a main time system?

I have a solar system containing multiple planets, most having an intelligent species inhabiting it. To keep a common peace, they created a large government system to help stop territorial wars ...
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  • 161
2 votes
7 answers
1k views

Could written documents last for 3 million years?

This is another question about my fantasy version of Pluto. Basically, I’d like the Plutonian’s civilization to be at least 3 million years old, and there are written documents from when their ...
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  • 1,117
5 votes
6 answers
1k views

How old are people from several worlds? [closed]

In an universe with several worlds, how would people from different planets define their age in a way that everyone use the same basis ? Different species have different lifespan, like humans up to ...
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2 votes
1 answer
234 views

how would a Black-Mesa-like research complex fare after 500 years of abandonment [closed]

So, take Black Mesa from Half Life. What would it look like after 500 years of abandonment? (assuming the events of half life have not occured) For this scenarios there are no looters or humans ...
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18 votes
10 answers
7k views

How much would a language change over 500 years completely cut off from its source?

In the lore for the book I'm working on, what basically happens is a ship full of Byzantines is expelled from their homeland on a ship and winds up on a small continent (think something around the ...
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4 votes
2 answers
106 views

Tracking time between multiple different realities simultaneously

How do I track time (using a special time system) between two realities that are not necessarily parallel but if a person jumps from one to the other what would the time be in comparison to their ...
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4 votes
3 answers
394 views

How to get time to pass faster on another planet compared to earth?

I'm developing a story where humans colonize a few planets. One planet, lets call it Planet A, has similar gravity to earth, air pressure, and solar radiation. You cannot however, walk on the surface ...
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