Questions tagged [stars]
For questions about luminous spheres of plasma held together by their own gravity, generally comprised primarily of hydrogen and helium.
363
questions
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How to Make the Two Stars of a Circumbinary System Look like One
For context: say I have a planet in a P-type orbit around a pair of binary stars. One's a K-type and the other is a red dwarf (M-type). I want it to be such that, planet-side, it looks as if there is ...
8
votes
2answers
338 views
Time scale and mechanism to “realistically” remove Sol from the Milky Way
What is the fastest rate a star could be flung out of our galaxy and by what mechanism(s)? (i.e. from a gravity kick by a hypothetical passing hypervelocity black hole)
Secondary question: how far ...
6
votes
3answers
509 views
Will a Universal Ocean Prolong the Age of Stars for Eternity?
One moment, there are as much as two trillion different universes, all of which have their own collections of galaxies. The next, 4,543,000 universes still have their galaxy collections. What ...
2
votes
2answers
71 views
Biblaridion's equation for making a star based off its luminosity
I have searched for at least 45 minutes and I can't seem to find it. If you don't know what I'm talking about, in Biblaridion's first Alien Biospheres Video, he mentioned the you could calculate a ...
0
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0answers
65 views
What is the Roche Limit of a White Dwarf Compact Star?
Far, far away in the universe (specifically, 542 million kiloparsecs from here), a galaxy stands as an enduring legacy of a long-extinct hyperadvanced alien civilization, high among the Kardashev ...
6
votes
3answers
337 views
What skin, hair and eye colors would people living under different stars have?
My setting includes several natural and terraformed earth-like worlds orbiting various main sequence stars, from M class dwarfs to A class giants. Humanity has independently developed from stone age ...
2
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3answers
91 views
can a planet be in the habitable zone of a blue star be the best option or a star that gives off more blue light
My planet originally was in a system with a blue star, but I think they are unstable and so it's not the best. So what type of stars give off more blue light in order for plants to be yellow or blue. ...
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0answers
63 views
In regards to mass and luminosity, what are those mystery stars?
Long ago (4.6 billion years, to be exact), a hyper-advanced alien civilization had created a solar system from scratch. Somehow, they had artificially prolonged the center of the solar system--a ...
3
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2answers
133 views
Would a group of Dyson swarms produce a noticeable pattern in a distant night sky?
I am currently writing a scene where a person on an Earth-like planet is stargazing. This planet, an isolated agrarian world, is around twenty light years from the core of the setting's space empire, ...
11
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2answers
235 views
Do stars work in hyperbolic space?
Any curved space is approximately Euclidean on small enough scales, so for a sufficiently large characteristic length (significantly larger than the radius of the smallest real stars) the answer is ...
5
votes
3answers
980 views
Double planet climate
How far would 2 tidally-locked (to eachother) planets need to be from their blue star host to be habitable, but have a cold-weather climate similar to our Ice Age?
6
votes
3answers
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How big of a problem would UV radiation be for colonists around a main sequence blue star?
I've settled on using a blue star for my setting. It'll probably either be a small B or large A-type main sequence star, somewhere between 2 and 4 solar masses. There is one relevant planet. I've ...
3
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4answers
1k views
Central planet in binary star system?
https://en.wikipedia.org/wiki/Habitability_of_binary_star_systems
The wikipedia article describes P-type and S-type orbits for planets in binary star systems. There are possibly some other ...
3
votes
2answers
89 views
Could neutron flux from a hotter primary star/keep a brown dwarf burning?
Brown dwarfs are the smallest class of star ranging from 13 to 80 times the mass of Jupiter, 0.01-0.08 solar masses; it is thought that they are stars only because fusion reactions involving hydrogen'...
4
votes
2answers
92 views
Lasting spectral trace from funeral rites
So burial in space has been a thing in more sci-fi properties than I can count, and I've always wondered how long evidence of such a practice would last. In interstellar space there is little to ...
3
votes
1answer
107 views
How plausible is this planetary system with binary stars?
In my world, I have a binary S-type Solar System of Star-A and Star-B with these properties:
Star-A:
Luminosity: 0.86822 Sol / Mass: 0.98097 Sol / Radius: 0.91958 Sol / Radius of Hill Sphere: ~37.218 ...
3
votes
2answers
772 views
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 ...
8
votes
2answers
275 views
Effects of magic on stellar evolution
I believe it'd be foolish to assume that magic wouldn't affect astronomical phenomena like stellar evolution, But since I'm not smart enough to create the equations for a new fundamental force, I have ...
6
votes
2answers
205 views
If John Atkinson Grimshaw's Paintings were actually daylight, what kind of star would this "sun" be?
An Englishman by the name of John Atkinson Grimshaw was known only for his nocturnal paintings of the British landscape.
I don't know about you, but his nocturnes have struck me as a bit...bright. ...
0
votes
1answer
150 views
What Would the Sky Look Like If the Sun Were a Different Color (And Still Half a Degree Wide)? [duplicate]
This question has been asked many, many, many times--what would the sky look like if the sun were a different color? But the mistake I keep seeing is that they used actual stars and imagined Earth as ...
3
votes
1answer
115 views
How Much Solar Wind Does A Star Produce?
I need someone to give me a way to figure out how fast the solar wind from a star with a known mass travels, as well as how much solar wind the star releases in a given amount of time. I hope that it ...
3
votes
2answers
111 views
How Would An Advanced Alien Civilization Expand the Lifespans of Giant Stars (Nearly) Exponentially? [closed]
Long ago, in some distant galaxy, an advanced civilization had turned a small, young elliptical galaxy into their own astronomical playground. They seemed to have come up with a way to prolong ...
5
votes
2answers
259 views
If Thorne–Żytkow Objects Exist, How Far/Wide Would Their Habitable Zones Be?
First proposed in 1977 by physicist Kim Thorne and astronomer Anna Żytkow, a...you know what? Let's just call it a TZO, sounds easier that way. Anyway, a TZO is supposedly a giant or even a ...
2
votes
1answer
120 views
Climate of a Planet in a Binary Star System
Would the climate of a planet in a binary star system consisting of a K star and a G star be affected by the binary system? By this I mean, does having two stars at the center of a solar system affect ...
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vote
0answers
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In this infant (<500 million years) solar system, how far would each orbit be to be stable?
Here's the story: There is a solar system that is still a baby, less than 500 million years old.
There are a total of eight stars clumped into four binaries, each one with its own habitable zone. ...
5
votes
2answers
116 views
Maps of star clusters
Inside star clusters, there are regions where stars are within 1 light year of each other. I wish to create a sci-fi setting in one of these regions. To start, I have tried to find maps/charts of ...
2
votes
3answers
58 views
Is the following plausible: a moon at an L1 point orbits a gas giant, which orbits a sun. the moon is submerged in half daylight half moonlight
I'm writing a sci-fi & fantasy novel, I won't get into details, but in essence it's set on a fantasy moon that orbits a gas giant, which orbits a sun. The moon is at an L1 (Lagrange 1) point, and ...
2
votes
2answers
186 views
Is it plausible for a planet to have a face constantly sunlit while the other is constantly moonlit, with the sun/moonlit territories never changing?
I'm writing a sci-fi & fantasy novel, I won't get into details, but in essence it's set on a fantasy planet that orbits around a sun, and has a moon. The basic premise (that I'm hoping for anyway) ...
4
votes
3answers
359 views
Could there be a star where humans could survive for a short time?
This honestly sounds like it's basically impossible, but here we go anyway.
We've picked up a strange reading from a spot orbiting a star in a system elsewhere in the Milky Way galaxy. We've come into ...
4
votes
1answer
132 views
What environment do I need for gluonium entities to thrive in?
Gluons are the particles that hold quarks together. The way they do this allows them to hold each other together in the form of gluonium.
Gluonium only appears at high temperatures such as those ...
13
votes
6answers
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Can a planet move itself?
Most questions in this vein seem to center around the inhabitants of a planet moving it. I have a significantly different spin on this idea, though.
So, you're a big ball of rock spinning around a ...
12
votes
3answers
780 views
What is the largest possible appearance of a celestial body in the sky?
In SciFi Art we often see planets/moons/stars fill enormous amounts of the visible sky. I'm wondering what the theoretical limit for this is realistically, since there are maxima for the possible size ...
2
votes
1answer
89 views
Rocheworlds mass
Suppose you've got two tidally-locked planets, each one orbiting its own red dwarf. With two red dwarfs to hold the planets, could the planets get close enough to share atmospheres? And how would you ...
1
vote
1answer
103 views
Climate in a S-type orbit planet in a binary star system
I made a planet orbiting (S-type orbit) a K-type star in a binary system; the other star is F-type.
Star
F-type
K-type
Mass
1.3 M☉ or 2.6x1030 kg
0.7 M☉ or 1x1030 kg
Radius
1.14 R☉ or 0.8x109 m
0....
7
votes
2answers
743 views
How would I make a natural, long-lived red giant star?
I have a system in which the main habitable planets are on the many moons of a super-neptune. The ice giant has not migrated inwards, but rather the habitable zone has expanded outwards due to the red ...
0
votes
1answer
125 views
Would Sean Raymond's "Ultimate Solar System" Work in This Particular System?
Presented here is a system in which a binary of orange dwarves orbits a binary of yellow dwarves. Each yellow dwarf is 105% as wide, 110% as massive and 126% as bright as our sun. Each orange dwarf ...
0
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1answer
148 views
Is a Gamma Ray Burst Cannon possible? (G.R.B.C. Part 1/2)
Now, for a little context, L.G.R.B.C.s, or Lesser Gamma Ray Burst Cannons, are extremely powerful weapons that are used almost exclusively by the Karan, a race of religious automatons that wish to ...
10
votes
6answers
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A Habitable Zone Within a Habitable Zone--Would that Make any Difference?
Presented here is a quaternary solar system consisting of two binary orbits. One consists of two red giants, each one 100 times as wide, one-third as massive and 100 times as bright as our sun. Both ...
0
votes
1answer
138 views
Alternative earth-like planet environment that supports human life
So i want to create a planet that supports human life. Primarily, i would need to consider a star type, an atmosphere, foliage pigment, and potentially different types of plants. Think of it as a sort ...
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votes
1answer
76 views
Kinds of stars and local plant life [closed]
I know how the color of a planet's flora is affected by the light from its sun. But my problem is I keep getting things confused. Does anyone know of a resource that lays it all out in a chart? I'm ...
6
votes
3answers
263 views
What are good lower and upper bounds on year length for habitable planets?
In science fiction dealing with multiple intelligent species, "year" is still often used as a unit of time - like when describing a character's age - even when dealing with species that ...
3
votes
2answers
228 views
In This Picture, How Far Can One Binary Orbit the Other?
In an alternate Milky Way in an alternate universe, there is a cluster of stars so dense that nights are over 60 times brighter than our full moon. In that cluster is a solar system presented (albeit ...
3
votes
2answers
215 views
Difference between F type stars and our sun
I'm writing a science fiction series. I have an intelligent nation of reptilian people who live on an Earth-like planet orbiting an F-type star. This nation needs to bask in the sun. How will the ...
5
votes
2answers
98 views
how can you accelerate the fusion cycle in high mass stars?
I'm trying to design a device that would cause a supernova in a high mass star. I want some kind of explanation so the device doesn't seem so handwavy. Is there any way to somehow increase the amount ...
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3answers
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How far would we have to travel to make all of our familiar constellations unrecognisable?
How far would we have to travel to make all of our familiar constellations unrecognisable? (in terms of human recognition)**
We know that groupings of stars in constellations is illusory. Two ...
asked Jan 10 at 14:51
chasly - supports Monica
46.5k12 gold badges139 silver badges288 bronze badges
3
votes
2answers
156 views
How Many Red Dwarves Can Make One Stable P-Orbit?
Red dwarves are the most common stars in our galaxy, if not the whole universe. They are small--the largest don't exceed one-half of a solar mass--but scientists still believe in their potential for ...
11
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3answers
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Could a dyson sphere survive a supernova?
So, a civilization built a massive Dyson Sphere around a supergiant star. As the star ages, it begins to fuse iron. At this point, the force of radiation pressure cannot prevent core collapse, and ...
8
votes
4answers
2k views
Can Multiple Stars Naturally Merge Into One New Star?
Assume just for this question that in one same plane of space, there are the following stars within close proximity of each other:
An O-type main-sequence star (18x wider, 15-90x more massive and 40k-...
6
votes
2answers
208 views
Could a red giant be re-stabilized?
First, some context: I am creating a habitable world with intelligent life present in the second main sequence of a star (hence why it needs to be re-stabilized). This life discovers the ruins of an ...
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0answers
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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 ...
