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Questions tagged [sun]

For questions relating to the star in our solar system. Consider also [stars].

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The calculation of sky surface brightness based on the apparent magnitude of the light source [closed]

I am wandering aimlessly to find the proper formula, which would calculate the sky surface brightness in any direction based on: apparent magnitude of the light source angular distance from the light ...
Geographos's user avatar
0 votes
2 answers
104 views

Question about finding an exact lunar orbit

I am trying to find a precise orbit for a moon that would allow it to always be in an eclipse. So, basically, I need help finding a formula for the semi-major axis and mass ratio that would get the ...
DanceroftheStars's user avatar
2 votes
2 answers
175 views

If Earth were located at 1.1 AU from the Sun, would this affect the two zenithal passage days in the Tropics?

I am designing calendrics for an Earth-like planet located 1.1 AU from a Sun-like star. On Earth, on April 30th and August 13th, the Sun appears to pass directly overhead between the Tropics of Cancer ...
JM Yaden's user avatar
  • 305
0 votes
2 answers
215 views

How much water must I dump on the Sun to put it out forever? [closed]

Water blows out fire and stop it from burning. How much volume of water, $H_2O$, is needed to put out the sun forever?
Xandi99's user avatar
  • 35
2 votes
1 answer
197 views

Does My Planet Have to Have a Perpetual Sand Storm to Have a Blue Sun?

I’m creating an Earth-like world where the inhabitants and visitors to the planet see the planet’s sun as blue in color. I think that the best way to achieve this result is via atmospheric light ...
Kal Madda's user avatar
  • 1,851
3 votes
1 answer
124 views

Help with a planet that resembles Mercury: double sunset/sunrise etc

I'm new. I'm here because I need help for the geography of a fantasy planet I'm building. I don't want to be scientific, but I also want that my planet is credible. I imagined a planet that has maybe ...
Lucrezia's user avatar
3 votes
1 answer
204 views

The Smallest Sun

What is the smallest sun that can exist in nature? Could a civilization develop an artificial sun that will fit inside the planet?
grldsndrs's user avatar
  • 215
13 votes
11 answers
4k views

How can a magic civilization stop their sun from dying?

Hypothesis: In application of the laws of thermodynamics (conservation of energy) it could be that the sun's energy was (almost) depleted to perform feats of magic (energy was taken from the sun). ...
GilouLeFou's user avatar
3 votes
2 answers
130 views

Would it be possible for a planet to have long nights and still be warm? [closed]

Hypothetically, could a swamp planet with long nights exist? Additionally, would it be possible for this same planet to have two moons and a sun?
Cid's user avatar
  • 47
2 votes
1 answer
88 views

What is the plausibility of people living on a planet with two suns? [closed]

Some of my characters travel to a planet orbiting two suns. They don't spend long there and it's implied some other species lived there before but don't anymore. Is this possible? Would two suns ...
ambient chaos's user avatar
2 votes
2 answers
430 views

How would a planet with three suns, orbiting only one work?

Okay, I am planning to make a planet that has three suns, and orbits one of them. Each of the suns has its own orbital path, so it's possible for the planet to have one sun, two suns, or three suns in ...
Tyson Dennis's user avatar
2 votes
1 answer
75 views

How would the synodic period of Venus change if both Venus and Earth were moved equal distances away from the Sun? [closed]

Let us say that Earth and Venus are both moved 10 million additional miles from the sun. How would the synodic period of Venus appear to change for an observer on Earth? If 584 days is Venus' current ...
JM Yaden's user avatar
  • 305
4 votes
1 answer
86 views

Planet Orbital Zone and Year Length

So I'm building a fantasy world that takes place on a planet with a circumference of about 18,500 miles (it's average temperature is 40℉), and it orbits a Blue-Giant. How long would a year be, and how ...
CaptainYulef's user avatar
4 votes
3 answers
544 views

What percentage of the Sun's energy can you capture with a Dyson swarm?

My secret society is planning to advance humanity as much as possible and they have decided the best way is to build a Dyson swarm. Still, they don't know how much power from the Sun they would be ...
Balzed's user avatar
  • 51
3 votes
1 answer
789 views

What would something as hot as the sun do to its surroundings on Earth? [closed]

Introducing sun boy, he has the magical ability to maintain a constant body temperature equal to the surface of the sun. What would be his effect on his surroundings? Would he just vapourise ...
Mattna's user avatar
  • 562
2 votes
3 answers
323 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 ...
Tomatyde's user avatar
6 votes
8 answers
2k views

Is it possible to have a habitable planet with 2 sun that have sunset for one and sunrise for the other at the same time?

One of my characters is a bit of a romantic, he also have a post singularity fleet of spaceships at his disposal which he plans on using to scour the galaxy to find what he considers the ultimate ...
cypher's user avatar
  • 7,113
9 votes
4 answers
1k views

What will exactly happen if a small amount of iron from the sun's core were teleported to the Earth's surface?

It is obvious that the surrounding area will become extremely hot, but I want to know other consequences if enough iron to make a sword were to be teleported to earth. Would it be possible to make a ...
Qazi Talha's user avatar
4 votes
5 answers
261 views

Endless global night.. but an agreeable climate, how come?

How would my planet develop an acceptable climate, without a sun ? There is no (visible) sun, but the climate permits STP, and there are 1 or more luminous, rocky moons providing some light. Perhaps ...
Devsman's user avatar
  • 3,530
3 votes
1 answer
129 views

How far away would you need to be to survive a jet of stellar plasma on the surface of a "planet" built around a sun?

So, I'm considering writing a story, and one of the settings is a world created by a powerful wizard millions of years ago, by opening a thousand portals to gate in a thousand Earth-like worlds that ...
nick012000's user avatar
  • 5,306
4 votes
2 answers
146 views

What are some means of subjecting Earth to a constant magnetic field imbalance capable of damaging or shutting down unshielded electronics?

I'm trying to make an alt-history in which electronics are constantly effected by higher-than-normal background magnetic effects - think a constant geomagnetic storm, except not necessarily caused by ...
KEY_ABRADE's user avatar
  • 12.8k
2 votes
1 answer
77 views

What would be the consequences for microelectronics if the Sun caused more coronal mass ejections?

Let's say that the Sun, instead of being the relatively tame star it is IRL, constantly sends out low-level but unpredictable coronal mass ejections that aren't enough to negatively affect life but do ...
KEY_ABRADE's user avatar
  • 12.8k
21 votes
8 answers
6k views

Can an asteroid go through the sun?

I'm looking into a story where the Earth is hit by an asteroid going very fast. This must be a complete surprise and I want to go a mile further than just giving the entirely valid solution of it ...
Trioxidane's user avatar
  • 37.1k
4 votes
14 answers
2k views

How could physics possibly explain the sun hanging motionless in the sky?

Right at twilight, the sun stops setting. It just stays in the same spot in the sky permanently. What would have to happen in physics for this to happen? Would there need to be an event prior to this? ...
BOMEz's user avatar
  • 149
2 votes
3 answers
891 views

If Earth started to lose mass, how would this affect its orbit around the sun?

Im building a world where the matter in the inner layers of the Earth starts to be replaced by a much lighter element causing earth to lose its mass. Would this eventually cause the Earth to leave the ...
dincojava's user avatar
1 vote
0 answers
113 views

World building - Sky color, star class based on the color of the plants [duplicate]

Starting a new project here If my plant foliage is blue-green/turquoise and my under water plant are in the reddish-brown/ochre color - What color should the sky be (mid day and dawn/dusk) and what ...
Veknor's user avatar
  • 632
1 vote
4 answers
505 views

Hosting Life Near an Anti-Star

An anti-star is a star that produces energy via antimatter annihilation. As annihilation is 100% efficient at turning matter into energy, an anti-star the mass of the Sun produces 100 times as much ...
TysonDennis's user avatar
  • 2,380