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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How to predict the radius of a Red giant [migrated]
I am working on a sci-fi that goes over such a large length of time that I will be having stars dying out, and this raises a question that I would need to find an answer to.
How can one predict the ...
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How visible would stars be from a planet orbiting an M-class star?
I have a planet orbiting at 0.2067 AU around a M-class red dwarf of mass and luminosity 0.4037 Msol and 0.0286 Lsol, respectively. The planet has an atmosphere of 93% CO2 and 3 atm. What I wonder is, ...
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Very large orbit binary/trinary star systems
In my universe, Ancient Aliens once visited Earth with consequences.1 At that time they left instructions2 that 5,000 years3 in the future something would happen.4 The instructions left behind a ...
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How to find visibility of stars given a certain moon brightness
How would you be able to calculate what magnitude of stars would be visible given a certain brightness of the moon. As I know that the visibility of stars are based on their compared magnitude to a ...
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How to calculate the expected rotational speed of a star
I am working on fictional stars, and I want to have as many points about them as I can, and most things I found relatively easy, except for rotational speed.
I am not sure exactly how to find at what ...
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Auroras of a planet around an active M7 red dwarf
A planet the size of earth around a pretty active M7 red dwarf (think of M to X level flares almost every day) has a decent magnetic field of 0.5-0.8 Gauss, orbiting at a distance of 0.0443AU, with a ...
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Could a planet orbiting a g type main sequence star have yellow on its surface? [duplicate]
I had saw somewhere that a habitable planet orbiting a g type star same as our own could have yellow plants so could it?
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Do Forbidden Lines in Stars Often Come in Groups
In previous questions, I asked about how a K2V star could develop an [O VII] forbidden line and how those x-rays would create "pseudo-aurorae". Now, I'd like to know if my star could ...
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How close can a yellow hypergiant be to not affect a star system but also be important to the locals mythology
The Hypergiant
The hypergiant is a yellow hypergiant (YHG) which is currently cooling down and becoming a red hypergiant. It is roughly something that has a spectral type of maybe G3 0-Ia, though the ...
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Visibility of My "Psuedo-Aurorae"
I have been designing a habitable planet, its moon, and its star for a while now.
Background
My star is a K2V star with very strong solar wind and is about the age of the Sun. Every so often, when the ...
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Binary red giant?
I'm currently building a habitable tatooine-like binary system with the following stars:
Mass: 1.09 / 0.85 M⊙
Luminosity: 1.41 / 0.52 L⊙
Radius: 1.07 / 0.88 R⊙
Temperature: 6,087 / 5,230 K
Spectral ...
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Is there a way to make a K-star have an unusually strong stellar wind
I have been making a planet and its star for some time now.
Background
In a previous question, I asked how a star could develop an O VII forbidden line and I generally realized that the star needed to ...
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How could a K star develop an [O VII] Forbidden Line at 22.1 Å
The Goal
I have been designing a planet for quite a while now, and I would like the star to have an [O VII] forbidden line in its atmosphere. There doesn't need to be too much, but I need enough for ...
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Would an increase in star density affect the "Goldilocks Zone"?
Let's say that there's a solar system that matches the description of Sol exactly, save for the fact that it's 20,000 light years closer/farther to the galactic center.
Would the zone of one ...
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Would a star's spectroscopy be stable enough on approach to use it as a navigational reference from a great distance?
NOTE: The offered "duplicate" question IS NOT WHAT I AM ASKING. Alternative methods of navigation ARE NOT ACCEPTABLE as answers. I am specifically asking whether or not a ship traveling in ...
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Looking for a Specific Planet
I know my title isn't the most specific, but the planet I am looking for is. I have been looking through many exoplanets and I can't seem to find what I am looking for, the closest I have found is ...
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Using Neutron Stars to Generate Electricity
Quick question
In my world building project I have a civilization that lives on a planet that orbits a Neutron star. Neutron stars have an extremely powerful magnetic field so I was wondering if it ...
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Suitability of White Dwarf stars for supporting a Matrioshka Brain?
Note: I'm working on a far future sci-fi setting for a novel series which aims to blend elements of both "soft" and "hard" science fiction concepts. I'm aiming for the series to be ...
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What are some pseudo-scientific ways to explain the qualities of a yellow dwarf hyperstar?
Basically, in my stories, there’s a habitable, Earth-like planet called Ozarvis 32. It is the 32nd planet from the star of the Ozarvis Stellar System, which has 68 planets, 12 of which are in the ...
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How do I make an Earth-like habitable planet tidally locked to a red supergiant (class L or M)?
Assuming tidally locked planets have the potential to be inhabitable: Is there any way for a planet of Earth-like size to become tidally locked to a red supergiant of class L or M?
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Habitable zone of this red giant
I have a Red Giant star of about ~4.15 solar masses (a number I generated from what I found to be the average size of red giants).
My question for right now would be "What would be the habitable ...
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Frozen Star- Red dwarf goes supernova, just because I froze it?
So as I mentioned in my previous question in the series, the parent red dwarf star of a one-planet system, Eridanus, has frozen over due to an unknown reason. By a "frozen red dwarf star", I ...
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A brown dwarf world
I’m thinking about making a detailed world on Luhman 16 B (not around the star, right on it). This brown dwarf's mass is 28.6 times that of Jupiter and has a radius 104% that of Jupiter. It has a ...
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Is a p-type binary system with two suns and two moons possible? [closed]
I want to have a fantasy setting with two suns and two moons. Ideally, the stars would be 5 million km apart, orbit each other every 10 days, and pass in front of each other every 5 days, creating an ...
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Would colonists living on a planet orbiting an F-class star need underground shelters to protect against radiation?
In my fictional universe, people have colonized a planet that orbits an F-class star. I know these stars give more intense radiation and solar flares than G-class stars. This leads me to think bunkers ...
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Distances needed to make this system stable
Let's take the Trappist-1 system, and specifically, I'm thinking about the star itself and Trappist 1e because it's the most habitable of the seven planets:
Trappist 1 star is approximately 8.98% of ...
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For a period of time, could life be possible in a black dwarf star?
I was thinking about whether it might be possible for life to eventually form in a black dwarf star that has cooled to a point where liquid water forms on its surface. The main questions I have are:
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Creating a second earth: the problem with stars
(Continues along the premise of this question: Creating a second earth: How to make a continent?)
So, thanks to their helpful team of ask forum buddies, 😉 the terraformers designing New Earth have ...
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Is it possible for a star to orbit a planet? [duplicate]
At first the answer seems simple, no, but the more I think about it the more it seems this might be possible.
For the sake of the question don’t think about the probability of this actually happening, ...
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What would the stars look like near the centre of a galaxy?
In this sci-if scenario, angry aliens “evict” Earth and the sun from the galaxy using their clarkean wormhole technology, and sol ends up in a new region of space. Sol is now located near the core of ...
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what cosmic event could teleport a solar system? [closed]
In a project I am mulling over, humanity now inhabits the dense core region of a globular cluster. They did not colonise this cluster; some cosmic event actually teleported the sun, moon and earth (...
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Could an object exist at the barycentre of two stars
Returning to the powerful clarkean civilisation in this question What compounds could be used to dye a gas giant the colour of a rainbow?
These same artistically inclined omnipotent beings have ...
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What configuration should the worlds of a long lasting galactic empire take in the galaxy?
I have come across many galaxy maps showing the dominion/borders of one empire or another in different works of fiction. The first that comes to mind is WH40k for which the galaxy map of the different ...
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How do I determine the habitable zone of a binary star system?
Suppose two stars orbit each other and the planets orbit around the two stars' barycenter. I'm thinking of having at least one as a main sequence G or K class. For the sake of argument, let the other ...
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Under what conditions could a gold planet form?
So, I am imagining a draconic alien species which, (don’t laugh) inhabit a planetary system that is particularly rich in heavy elements such as platinum, silver, and yes, gold. (I said don’t laugh!) ...
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Could sapient life evolve in 2 billion years?
I am imagining a race of beings called Loshp, who evolved on a planet orbiting an F-type star. These stars live for only 4 billion years tops before evolving into a red giant, and half that time was ...
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How can I figure out measurements/distances and hyperspace jump time in my universe that is simple enough for readers to understand?
I'm using an alternate version of the Milky Way as my setting. I need to know how far it is from one planet/area to another, and know how long it takes to jump via hyperspace -- Yes, I realize ...
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Could merging brown dwarfs create a star? [closed]
So, let’s face it, brown dwarfs are dull. They’re too big for gas giants to want anything to do with them, and too weeny to undergo fusion and become a proper sun.
However, if this is a matter of mass,...
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If a gas giant became a star, what type would it be?
The concept of gas giant stellification has always interested me. I would however like to know: if a gas giant, (let’s say Neptune) was stellified by increasing its mass to trigger a temporary fusion ...
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Stellar Radiation Detons- Cosmic Weapon
In this setting, Humans have done multiple advances in technology and are nearly on the verge of being a Type III civilisation, They have nearly colonized the Milky Way and have tapped energy from ...
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How can I prevent solar flares?
Quite simply, people are trying to terraform extrasolar planets, starting with Proxima Centauri B. Assuming it is not tidally locked, is it possible to protect the planet from solar flares or to alter ...
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An Earthlike World Placed Around a Blue White Dwarf
A star that is bright, gives off blue light, and can have a world that mimics conditions on Earth is tricky. I'm hoping I can get one around a blue-colored white dwarf star.
What does the arrangement ...
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Could dark matter be used to change a star's position in the main sequence?
Helioforming is the ignition of gas giants of various sizes, or black dwarves, to create protostellar or even stellar celestial bodies. This can be achieved in two ways: compression or mass increase, ...
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Would extracting hydrogen from the sun lessen its lifespan?
Relating to my earlier question Is it a good idea to harvest the sun to terraform Venus?
Suppose that we continue to “mine” the sun for hydrogen to be used as rocket fuel. If we continued to do so, ...
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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 ...
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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'...
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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 ...
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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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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 ...
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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 ...
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