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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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Why do stars burn at a relatively same rate [on hold]

Thanks for sharing your knowledge! I was wondering why a star doesn't have is hydrogen fusion rate accelerate from the energy being released? Is gravity able to contain the rate?
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How to navigate a ringed planet at night?

I'm working on a story set in an Earth-like world but with rings (say, proportionately similar to Saturn's). I'm trying to get a solid handle on how these rings would affect the sky. For the ...
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1answer
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Could this moon of a gas giant orbiting a neutron star support life?

Making the following assumptions: 1. The three moons of the Gas Giant are safe enough distances from and massive enough not to pull each other apart or send themselves careening into the void. 2. ...
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6answers
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Can a collision with a neutron star make a planet via the can-o-snakes method?

Simplistically, a neutron star is a celestial body with enormous mass crushed into a small volume. That crushing force is gravity and the result, one might think, is atoms packed much more closely ...
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How do you non-catastrophically reduce the mass of the Sun by half?

In my previous question, I asked how much mass the Sun would have to lose in order for Saturn's orbital velocity to be its escape velocity. The answer proved to be somewhat unexpected - when the Sun ...
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4answers
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How would an advanced alien race go about preventing their sun from dying?

I'm currently designing an advanced alien race that has found a way to prevent its host star from dying. But I'm not sure how exactly would that happen. So my question is, "How could you prevent the ...
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2answers
237 views

Would it be possible to create an artificial iron star?

I ran a quick calculation, and the mass of iron required to form a black hole is on the order of 10^40kg. So, suppose that in my story there is this almost much iron available to somehow be brought ...
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1answer
106 views

Increased Luminosity in Stars

I'm trying to construct a solar system, and I'm toying with the idea that the planet capable of sustaining life was initially outside of the habitable zone, but the star's advanced age has caused the ...
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1answer
151 views

Would this simplex ternary system be stable?

I'm trying to make a trinary star system but I'm not sure how it would work. The primary star is an M0Ve star (red dwarf flare star). The orbits of the other two stars are slightly more complicated. ...
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6answers
403 views

Can my spaceship figure out its position using Cepheid Variables?

In my story, reasonably far in the future, an intrepid group of explorers are on the first manned mission to the Andromeda galaxy, travelling close to the speed of light. They slumbered in suspended ...
6
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1answer
196 views

A self-eclipsing orbital ring

A common, matter-efficient science-fiction habitat is a hollow cylinder or ring in space that is spun to simulate the pull of gravity on its interior surface. These habitats have been imagined as ...
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3answers
248 views

How can the Hertzsprung–Russell diagram be used in star building?

As you can probably guess from the title, I have some questions about the Hertzsprung–Russell diagram, especially how to use it to make plausible stars. Some questions: Can stars exist in the black ...
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5answers
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How can I make a black dwarf star?

In response to a question about an asteroid filled with degenerate matter, Ender Look suggested that using matter from a black dwarf would be better than using matter from a white dwarf since black ...
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1answer
85 views

Visibility of second star in S-type system

So in my world there is a planet orbiting a star, which is in a far binary system with another star. Is there any formula to calculate when the distant star would be visible - times of year and/or day?...
10
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2answers
184 views

Dozens of Habitable Worlds in One System?

I want to know if this is physically possible. So at first I thought I was nuts. Then I started reading about Hill Radii, and googled left and right. Turns out a Hill Sphere is the region around an ...
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3answers
404 views

How to estimate a star's heliopause?

Is it possible to calculate/estimate the size of a star's heliosphere? If so, how? I am working on a semi-near future, sci-fi novel. As part of the technology base, humans are able to travel between ...
2
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2answers
177 views

How many habitable planets can I fit into the habitable zone of a Sun-like star and still be stable? [duplicate]

The habitable planets will be very similar in size to earth and are on separate orbits orbiting a Sun-like star exactly the size of our own Sun. How many habitable planets can I fit into the habitable ...
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4answers
54 views

Optimal arrangement for habitable zones?

So, here's my issue. My setting's central conceit is that a myriad of human societies developed at relatively concurrent times across a large system separated by only a few light-hours. (There are, of ...
11
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1answer
266 views

Could the Sun be born again?

About 5 billion years from now, the Sun will begin to swell into a red giant. This will cause some problems, because life on a planet orbiting a red giant is hard. Even if Earth isn't engulfed by the ...
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3answers
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Can two stars orbit each other but each have their own planets in stable orbits?

I'm aware that 'tatooine' worlds don't make good habits for planets, normally. From what I've read, either a planet has to orbit one star really closely, or orbit both stars from a really long ...
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5answers
7k views

How to make an Earth with 27 suns work [duplicate]

Viability of Many Suns This is the first of a thread of related posts on a hypothetical alternate universe/Light Plane. Other posts from this thread are here: How To Make an Earth with 27 Suns Work,...
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1answer
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A K-Type Binary Dawn/Dusk in the Equator

In this alternate scenario, Earth is the third planet in a binary star system. One star is a K-type main sequence star--or "orange dwarf"--that has 80% the mass of a G-type main sequence star--or "...
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1answer
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Would it be possible to farm the energy from pulsars?

From what I can tell, pulsars emit light in beams from the poles of the pulsar. Would it be possible to construct something to get energy from a pulsar's beams of radiation? Or is this as idiotic of ...
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1answer
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Earth Orbits a K-Type Star. What Would the Visual Scenery Look Like?

To clarify on the title, K-type main-sequence stars--shortened as "orange dwarves"--are subjects of excitement for astronomers and astrobiologists. Why? They emit enough radiation to provide a ...
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1answer
183 views

Is a supernova powerful to destroy the other star in a binary system?

So, you have the big bad race, whose extermination method is basically to force stars to go supercritical via the power of handwavium. You can assume 1 solar mass for each, but you can change it if ...
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3answers
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Life in the water/snow line of a protoplanetary accretion disc?

So I was reading this article recently, titled Stellar Outburst Brings Water Snow Line into View: http://www.eso.org/public/news/eso1626. In short it's about a protoplanetary accretion disc around a ...
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1answer
110 views

Can I see my secondary star?

I have a binary star system and have come up with some stats for it. My primary star is an F-type, with a mass of 1.3 sols and a luminosity of 2.197 sols. My secondary star is a K-type, with a mass ...
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4answers
285 views

Star system that isn't the Sun: words for “sunlight”

Language revolving around the Sun would probably not be used on a planet with a different star, right? For example, if a planet was orbiting Sirius, "siriuslight" or "siriusburn" seems a tad clunky, ...
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2answers
107 views

Can a fission satellite duplicate the radiance frequencies of a star?

I sometimes think about the arrogant dwarf starsmiths in the question. How to blow up a star by accident? I pose the question in the voice of the dwarf, probably because I am hungry for down votes. ...
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4answers
228 views

References to evil star myths?

I'm in a D&D campaign where astronomy plays a big deal. I want to name drop and reference some good astrology myths about evil or cursed stars, but I'm having an awful time finding anything. The ...
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2answers
207 views

A new approach on multi-star solar system [closed]

The most common concepts of multi-star systems, it seems to me, are either unrealistic / impossible OR do not have the "feeling" of a multi-star system commonly depicted in films etc., i.e. multiple ...
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2answers
184 views

Habitable planet in a multistar system

I'm trying to design a world in the Alcyone A system of the Pleiades. Alcyone A consists of three stars. The main star is 3.4-3.8 solar masses. There is a very low mass star < 15 million miles ...
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9answers
656 views

How to destroy a star system?

The admiral of a space fleet that belongs to a Type 3 civilization has been given orders to obliterate all planets within the habitable zone of a Sun like star. Some of the planets have been ...
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2answers
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What would happen if 10^37 J of energy was dumped into the sun via antimatter detonation?

My first post here, and it's more about destroying worlds than making them. Consider this scenario: An earthlike planet where a powerful magic spell has been cast, protecting all positrons from ...
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1answer
164 views

How would a colliding binary affect its planetary system?

The scenario is based on the fact that a tight binary of two neutron stars does not hold for long: The two bodies lose energy in the form of gravitational waves and they spiral towards each other and ...
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2answers
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What could be done to make a red dwarf become a blue dwarf, then a white dwarf and then finally a black dwarf in a short amount of time?

My civilization is highly advanced Type III and wants to conduct an experiment on a red dwarf. They want to artificially cause it to become a blue dwarf, then a white dwarf and then finally a black ...
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Could I make this dark and eerie world possible?

The inspiration came from the music in the title sequence of the film Alien. The idea is a planet that humans have colonized where it's almost always drizzling slightly. It's always dark but there is ...
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1answer
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Is the temperature on my planet affected whenever my binary stars are aligned?

Here I began exploring appearances of binary stars when standing on a planet. The planet orbits both stars. I've established through the help of this community that there are times that the two ...
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2answers
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Would lensing make stars in a binary system appear further apart at sunset?

I am revising my first draft and trying to add more evocative details. Here, I asked whether stars in a binary system are likely to fall on the ecliptic. As my hero hikes through the day and suns ...
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1answer
274 views

How would life be on Earth if the Sun was replaced a binary star system? [closed]

Assuming an identical Solar system except for the strange sun(s) and that the binary star system's barycentre coincides with the Sun's centre of mass mass of the combined star system is equal to the ...
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9answers
304 views

Binary star system, What time is it?

You are native to a planet that falls between two suns, thus ensuring eternal sunshine. How would we be able to tell the time? Do you formulate some kind of system based on which sun is in the sky at ...
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2answers
155 views

Is It Possible to Establish a Human Colony in a Flare Star System?

I am thinking about using Groombridge 1618 as a setting for my world. It is a main sequence star of spectral type K7.5 Ve, 67% of the Sun's mass. The habitable zone is at a radius of 0.26–0.56 AU. ...
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2answers
160 views

Neutron star “evolution”, how do neutron stars die? [closed]

According to this Neutron Stars start out composed of the same material as White Dwarves, combinations of Helium, Oxygen, Carbon, Neon, Magnesium, and possibly Iron before undergoing gravitational ...
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5answers
213 views

Is my celestial coordinate system efficient?

I want to know whether or not my starship's cordinate system is efficient or not. Soon after my race flew into the stars, we realised we needed to be able to tell where we were. We need coordinate ...
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1answer
95 views

Defining the perceived appearance of a moon from a planetary surface

I have a homebrew setting with a moon that has some specific features orbiting an Earth sized planet, and I'm trying to find out how these features would affect how the moon looks from the surface of ...
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2answers
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Do stars in a binary star system fall along the ecliptic?

I am wondering about Tatooine, and was reading about binary systems here, which provided a lot of good basic food for thought. My specific question is not addressed at that link, and so I pose it here....
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1answer
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What would a life form that evolved in deep space and without gravity look like? [closed]

Somehow the following hypothetical life form evolved in deep space with a long lifetime. It lives in a low orbit around massive stars, reproduces by eating interstellar gas and dust and uses the ...
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2answers
279 views

Could life on earth survive after the sun becomes a white dwarf?

It's my first time writing an original story and I have this idea, but I don't know if it could be scientifically feasible. My story would be medieval fantasy with magic, but I wanted to add a twist ...
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2answers
157 views

How to calculate the light received by a planet during a binary star eclipse?

I'm building up a spreadsheet on worldbuilding (Stars, Planets, Moons etc.) and i'm struggling to find an equation, or a group of equations to help me figure out the light received by a planet ...
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1answer
160 views

Calculating the orbits of binary stars around their barycentre

I've been building a world, partly for test reasons (making sure my spreadsheet works, and so i know what i need to add to it) and partly for fun, but for calender reasons i need to know the orbital ...