Questions tagged [stars]

For questions about luminous spheres of plasma held together by their own gravity, generally comprised primarily of hydrogen and helium.

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Can an earth-like planet exist in a circumbinary orbit around two k-class stars?While also having up to two dozen other planets in circumbinary orbit?

I have a plot arc in mind, but it all hinges on the feasibility of an earth-like world existing in circumbinary orbit around two k-class (or g-class) stars. The looming danger in the story arc is that ...
6 votes
2 answers
179 views

What would an eclipse with a translucent crystal moon look like?

What would an eclipse with a translucent crystal moon look like? In one of my worlds, a special moon orbits the planet — it's made of a translucent crystal, blocking only 80% of the incoming light. It'...
4 votes
1 answer
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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 ...
-2 votes
1 answer
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How fast do binary stars orbit each other? [closed]

Specifically I am wondering how fast a Class G star and a white dwarf would orbit each other in a type P binary system. How far away would they have to be from each other to have a stable orbit and ...
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4 votes
1 answer
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Can large stars have tidally locked worlds in their habitable zones?

I think the vast majority of space-enthusiasts has heard at some point that in order for a planet orbiting a red dwarf star to be habitable, it needs to be close enough to its parent star to sopport ...
6 votes
2 answers
191 views

How plausible is my solar system?

I am currently working on a world orbiting around a red dwarf star (M0V to M2V, I haven't decided yet) and I need some help with designing the solar system. My original plan was having 4 planets ...
6 votes
2 answers
114 views

How would I make my Quintuple Star System Stable?

So I've been working on a star system that I want to have inhabitable planets, so by stable I mean stable on the timescale of the stars themselves; billions of years at least. So my initial plan was a ...
3 votes
1 answer
143 views

What kind of star would allow for red plant life? [duplicate]

I'm designing an alien world in which plantlife is mostly red. I've read that the type of star the planet orbits plays an important role to the plants' color (For example, worlds around M type stars ...
3 votes
3 answers
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Selecting a Red dwarf for my planet

I am currently designing a world orbiting a red dwarf M type star and I would like to know what type of red dwarf do i need to choose (M0V - M9V stars) that can meet the requirements for my world. For ...
3 votes
1 answer
482 views

Replacing the sun with an type A star (Fomalhaut) in a fantasy solar system where there is an habitable planet

Lets says there is a planet in the goldilocks zone of a type A star (luminosity of 16 and mass of 1.9 (like the star Fomalhaut)) How far would the type A star need to be from the planet and how would ...
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7 votes
8 answers
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Is life feasible in an inhospitable binary system?

There is a planet orbiting a binary system inside the Goldilocks zone. The problem is that the binary system is of a violent kind. It either regularly explodes and sterilizes a portion of the planet's ...
2 votes
2 answers
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Possible alternatives to nebulas as a celestial smokescreen

I've been trying to find celestial phenomena that could act like nebula often do in Sci fi shows, i.e., A phenomena where a ship can hide from other ships A phenomena which is difficult but possible ...
0 votes
1 answer
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Various eclipses in a P-type binary star system?

Trying to make a world with a P-type binary star system, with a habitable planet orbiting around them, and one moon orbiting said planet. I am terrible with physics so I've been wondering if any of ...
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1 vote
3 answers
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On a Tidally-Locked Toroidal Planet

I am developing a world, and I need to see what exactly the surface would be like. It is tidally locked at 1AU away from the parent star. It is tidally-locked via being a Torus with a major radius of ...
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3 votes
1 answer
100 views

Length of seasons on a planet with eliptical orbit

In my sci-fi story, I have a binary star system with two Sun-like stars orbiting each other in nearly circular orbits. The separation allows them to have planets in stable orbits, and their habitable ...
4 votes
2 answers
96 views

Are there Tides Affecting Stellar Brightness?

I'm working on a fantasy story set in a slightly modified version of the Trappist-1 system (all orbits are perfectly resonant rather than only nearly so), and I am trying to get as good of an ...
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5 votes
3 answers
180 views

Blue star adaptation

If life did evolve on a planet around a blue star, what sort of adaptation could be expected? I so far have the autotrophs being yellow/orange or blue to absorb the light. I also thought the animal ...
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1 vote
2 answers
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Blue star vision

For sake of argument, let's assume life did evolve on an earth like planet around a blue star. I have this idea that the animal equivalent life wouldn't have color vision so to let in less of the ...
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5 votes
3 answers
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What evidence could reveal to aliens that their sun is the result of a binary star merger?

The answer to a previous question suggested life could have the time to begin and evolve on a planet orbiting a blue star if it was at first a binary pair that merged. The technical term is a blue ...
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9 votes
8 answers
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Life underneath a blue star

Blue stars are notorious for burning too bright and living too briefly for life to develop around them. But is there some way that life could survive long enough to reach the sentience stage? I'm ...
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7 votes
4 answers
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Could neutron star mergers provide the necessary elements for complex life in the early universe?

I have been looking into the earliest possible time in the universe that a human-like intelligent species could evolve based on the necessary elements being present. Kepler-444 is one of the oldest ...
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3 votes
1 answer
130 views

How fast would strangelets travel in space?

At what speed would strange matter travel in space after being ejected from a neutron star merger? I have searched around online but I have not found an answer.
4 votes
2 answers
299 views

What would happen if a neutron star approached the solar system?

Given its enormous eletromagnetic field and gravity( and probably gravitational waves would be very powerful) what would happen if a neutron star approached Earth? What if approached just by few light ...
9 votes
3 answers
943 views

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 ...
0 votes
2 answers
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How bright would these four stars look on the planet you're standing on right now?

Most of the numbers here have been plugged to me by someone you would find on both Reddit and the Speculative Evolution Forum. Imagine yourself standing on a planet in a quaternary solar system. The ...
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38 votes
8 answers
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What would happen to a star if most of its energy were reflected back at it?

For simplicity, lets use our Sun as the star. Next, a dyson sphere is built around it (completely enclosed solid sphere, not a dyson swarm or network, etc.). Handwave how it's built, it's not ...
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3 answers
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Is this scenario possible? How can it be done?-Dyson sphere replaced by gas giant star

Scenario: "...Regino is a gas giant approximately the size of Saturn, and three moons, Reo, Gei, and Tan orbit it. All three are small, rocky bodies a half to a quarter the size of Earth's moon. ...
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4 votes
2 answers
122 views

Ways to initiate a supernova explosion

Assume we have a star that is sufficiently massive to end its life in a supernova. Also, said star is currently fusing heavy enough elements that, under normal progression, it is within less than 200 ...
2 votes
1 answer
62 views

Solar harvesting with cycles of star lifting

I was wondering if it would be possible to take an O type star and lift material from it reducing its mass in cycles near the time the star reaches the end of its main-sequence age for each reducing ...
10 votes
3 answers
332 views

Living around a quark star

Let's assume the theoretical quark star exists - and humans have found it. There's a planet orbiting it, and for the purposes of my story, I want it to be habitable. My question is: Can you have a ...
13 votes
4 answers
2k views

Best star for a Dyson sphere?

Whether solid or a swarm, a problem that occurs to me long-term in building a dyson structure are damaging flares and magnetic storms from the host star. It seems like the absolute best option would ...
2 votes
0 answers
28 views

what kind of star would a planet need to sustain blue and pink flora and what effect would it have on ocean color? [duplicate]

The ecosystem on this planet, which I call Crilorix is thriving and I was hoping I can make the flora on the surface blue and pink? such as having blue leaves and pink bark on most trees and such, so ...
5 votes
6 answers
508 views

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
2 answers
354 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
3 answers
542 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 ...
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3 votes
2 answers
137 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 ...
4 votes
2 answers
227 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 ...
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6 votes
3 answers
504 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 ...
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2 votes
3 answers
137 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. ...
1 vote
0 answers
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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 ...
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3 votes
2 answers
152 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, ...
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11 votes
2 answers
302 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
3 answers
1k 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?
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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 ...
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3 votes
4 answers
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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 ...
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3 votes
2 answers
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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'...
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4 votes
2 answers
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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 ...
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4 votes
1 answer
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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 ...
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3 votes
2 answers
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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 ...
8 votes
2 answers
291 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 ...

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