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Worldbuilding

Questions tagged [astrophysics]

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For questions regarding the application of the laws of physics to orbital mechanics, stellar evolution, and other astronomical processes and celestial bodies.

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10votes
7answers
3kviews

I'm working on a video game set in a hard(-ish) sci fi setting, and an issue has occurred to me regarding shotguns in space. Shotguns - in theory - are an excellent weapon against drones and such that ...
0votes
2answers
134views

How much closer to habitable (for humans) would this hypothetical ‘Super Mars’ be?If 1.1 AU would destabilize it or Earth’s orbits, then a further orbit would be fine; the main focus is being closer ...
13votes
10answers
4kviews

I found a similar question but the scale was too large. I'm wondering what sort of astronomical disasters could affect a civilization roughly between Type II and III. Really, I'm wondering what sort ...
1vote
4answers
475views

In my story, Mars does not exist. Instead there's a copy of Earth in its place. this second Earth physically looks just like real life Earth, but there are no hominids on it nor evidence of human ...
1vote
1answer
218views

I want to use spaghettification, i.e. tidal forces as form of torture in my world. Assuming in-world I have the tech to pull this off, I need to know the set of parameters that govern the act of ...
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15votes
4answers
1kviews

If you have an infinite plane with a star (assume the Sun but if you can generalise for any star that would be great) at a height H above the plane (don't worry how it stays there), how would you ...
0votes
4answers
302views

Can we design & construct a artificial planet similar to our planet earth where we breathe?The artificial planet will be in between planet earth and red planet Mars in the orbit.This planet ...
2votes
1answer
149views

A story I’m hoping to work on centers around a spacecraft similar to the ISS with some obviously adjusted features (for example, more similar protection methods to the Parker Probe). This craft ...
4votes
2answers
170views

The Hertzsprung-Russel Diagram shows the relationship between luminosity and colour-temperature of stars. If we select a particular temperature and luminosity class, then tables found in places like ...
4votes
1answer
335views

It seems as though the heliopause is the end of the solar wind due to interactions with the interstellar medium or other stars' stellar winds, and late-stage Wolf-Rayet stars seem to have especially ...
3votes
4answers
334views

I'm thinking of adding FTL travel to my sci-fi setting, but I don't want to use wormholes or any version of hyperspace. While contemplating alternatives, I remembered the book A Wrinkle In Time, in ...
2votes
1answer
385views

My gas giant has the follow properties (where $_J$ refers to the properties of Jupiter):Mass: $3M_J$Radius: $1.5M_J$Surface gravity: $1.33g_J$Density: $0.88\rho_J$Atmospheric composition:22% ...
12votes
3answers
3kviews

Crash landing is bad. But what if the payload isn't fragile stuff like humans and machinery, but instead raw resources like Steel, Iron, or even Plastic? Would any of those survive a crash landing ...
3votes
3answers
185views

So I’ve just finished reading Neptune’s Brood for the second time and have found myself wondering what circumstances would be necessary to form a planet similar to Shin-Tethys. Essentially I’m ...
11votes
7answers
2kviews

I have a very rough idea for a setting where humanity discovers that stars, in fact, burn out much quicker than we imagined, so a human colony is stuck orbiting one of the last remaining stars in ...

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