Questions tagged [star-systems]
Questions regarding two or more stars gravitationally bound to each other
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Can any type of stars be contact binaries?
In this article Shortest distance between stars it is mentioned that
Some double stars can actually be in contact with each other.
This occurs when a red giant star has a white dwarf star ...
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1answer
102 views
How many arc seconds is Sirius “spiralling motion” around Sirius B?
I know that Sirius A and B orbit each other. I'd like to ask how large is their relative apparent motion in arc seconds, seen from Earth?
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2answers
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What happens when a star gets hit by a supernova?
This may sound like a strange question, but say that two stars are relatively next to one another in a binary star system, what would happen to one of the stars if the other went supernova? Would it ...
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1answer
34 views
Recognising lunar month only by looking the sky
Suppose somebody went on an island and don't have sense about time, dates, months. The only thing he has is seeing the sky. Is it possible to recognise which lunar month it is by just looking the sky? ...
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2answers
66 views
Do all orbiting objects have barycenters?
From the simple perspective of someone like myself, it appears that our sun is "fixed in place" (from the perspective of the solar system itself) and that everything else of lower mass orbits around ...
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2answers
53 views
What is the official classification and naming system of objects in the universe(, or what would my URI look like)?
Poetic human centric approach:
Universe/Laniakea/Virgo/MilkyWay/Sol/Earth/Humans/AndreasT
Little bit more technical:
...
1
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1answer
89 views
Where do gas giants end up?
I want to create a semi realistic star system generator but I am not sure where to "put in" gas giants. My guess is they can form pretty much anywhere within the sphere of influence of a star at the ...
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1answer
62 views
H-R diagram, Double stars
Can someone help me? I have a case, like, we have H-R diagram and two stars on it. One of them is a blue star on main sequence, another is a red giant. They have equal luminosity. If they are in a ...
5
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2answers
339 views
Trisolar syzygy and it's effects on the planet
Slightly spoilers here, but in the novel The Three-Body Problem, there's a scene in which Civilization #184 is destroyed by the stacked gravitational attraction of the planet's (aptly named Trisolaris)...
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1answer
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Color changing celestial body near the moon [closed]
While I was star gazing yesterday in the night time I observed a celestial body( probably a star ) flaunting various colors and was residing near the moon from the angle I saw it. It appeared to be ...
2
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1answer
58 views
Spectrum of star
I constructed a telescope and fixed my mobile's camera to the eye lens. I then viewed the sky via the mobile and I captured this image.
This is the magnified version of it:
I'm not sure if this ...
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1answer
34 views
Star revolving a star [duplicate]
Are there any star system(planet system) where a star revolves around a star? Is it theoretically possible?
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1answer
81 views
What if a white dwarf is less massive than her partner?
For example: a system with a 0.2 solar mass white dwarf orbiting a 0.25 solar mass red dwarf. Does the red dwarf steals mass from the white dwarf or vice versa.
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2answers
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Why are nearby stars like Proxima Centauri and Barnard's star not visible to the naked eye?
Proxima Centauri is the closest star to the earth other than the sun yet it isn't visible to the naked eye, but stars that are further away are easily found in the night sky. Why is that?
4
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2answers
165 views
What differentiates a “group of rogue stars” from a galaxy?
According to Wikipedia, a rogue star or intergalactic star is
not gravitationally bound to a galaxy.
But according to a citation on the same Wikipedia page, the first intergalactic stars were ...
1
vote
1answer
75 views
Could we see planets around active Stellar Mass Blak Hole?
This question is a followup of Is there any theoretical or empirical research about planetary systems with a black hole in their center?;
Since it is possible to detect planets around stars with the ...
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2answers
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How are solar systems found again after being discovered?
Discovering a solar system that cannot be seen by the naked eye on earth seems like an easy task with telescopes (e.g. the hubble telescope). I'm guessing, that our sun is the reference point for the ...
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1answer
45 views
Star systems forming when large gravitational force is applied
As far as I'm concerned, most star systems in our galaxy are traveling in fairly circular paths around the black hole at the center.
Hypothetically, if a large gravitational force pulled star ...
3
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1answer
170 views
Why does Sirius proper motion “wiggle” with a 1 year period, when Sirius A and Bs binary orbit is a 50 year period?
Some stars, if observed repeatedly over time, show a perturbation or "wobble" in their proper motion. If this is a periodic occurrence we can infer that the perturbation occurs due to the ...
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1answer
208 views
What is the tidal radius of the Sirius system?
The Fomalhaut system is a trinary system, with Fomalhaut A (1.9 M), Fomalhaut B (0.7M) and Fomalhaut C (0.2M). Fomalhaut C is 2.5 light years from Fomalhaut A, and 3.2 light years away from Fomalhaut ...
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2answers
128 views
Do you know about any Image Processing Challenges known in Space Telescope like Hubble?
For a computer science project in University;
I need to find image processing problems on space exploration and Space Telescopes, only related to the image itself.
I have wrote a computer program ...
3
votes
1answer
97 views
Why is the exoplanet HD 131399Ab so hot?
Recently, a fascinating triple-star system with an exoplanet has been discovered (arxiv).
I'm very surprised about the temperature of the exoplanet: it is roughly 850 kelvin, even though its orbit ...
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1answer
182 views
Can a star eject a liquid or a gas that has not been ionized?
Can a star eject a liquid or a gas that has not been ionized? I am implying that these gases could be a source of reusable energy.
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1answer
216 views
How many planets does Omicron Persei have?
Omicron Persei is a binary star. I did not find information on how many planets it has and if we can actually determine it currently. However, I do know that most stars have planets orbiting around ...
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votes
1answer
148 views
Has Science observed and recorded a stars birth?
Has Science observed the entire process of a star being created when the area of creation was just a void in space? Or is there still missing data that has not been entirely observed and recorded?
...
0
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1answer
112 views
Binary Star question [duplicate]
Is it POSSIBLE that we are a binary system? I have been doing research into this topic and it seems we may infact be a binary system. If we are, what effects would a massive body comming into our ...
5
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1answer
299 views
Stellar systems: what is the difference between virial, dynamical and thermodynamic equilibrium?
I'm currently going through Binney & Tremaine (2008) on my own to learn about stellar dynamics. I also have been perusing additional online resources such as this scholarpedia wiki.
Often when ...
0
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1answer
106 views
Sun like star in our milkyway?
Is there any popular star or one which we can see with our naked eyes in our milky way that is atleast 90% sun-like(mass,radius,spectra,luminosity).The important thing is it must not be a binary.
Its ...
3
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1answer
627 views
what is the percentage of stars with planetary systems?
I'm having hard times understanding the equation of Drake, i can´t find the number of the variable that refers to the stars with planetary systems (fp)
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2answers
352 views
Could a star revolve around a planet? [duplicate]
They actually do, but let's set Relativity aside for a moment. And the whole barycenter thing too. Here's the scenario:
Somewhere in the backwaters of a galaxy there is this huge planet. It is NOT a ...
3
votes
1answer
307 views
Estimates of exoplanets distribution consistent with current data
I am interested in current estimate of distribution of planets of various radii in various distances from their parent star. There is many sources, where one can find database of presently known ...
9
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2answers
249 views
Are there equal number of planets, stars, galaxies etc in observable universe spinning in both directions?
Just because we observed that our milky way galaxy is spinning in a certain direction therefore we assume it is applicable to all other galaxies, I am curious to find out if hypothetically most of the ...
0
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2answers
163 views
Why nuclear fusion is a controlled process in stars?
Nuclear fusion is the main way for stars to generate energy. But we know that nuclear fission and fusion are not controlled, then it causes chain reaction and sudden explosion. But why in the case of ...
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1answer
68 views
Realistic space environments [closed]
You've seen it in all kinds of science fiction, be it books, games, movies, and such. Space is depicted all sorts of ways, with asteroids far too close together, nebula thick enough to hide in and ...
2
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1answer
103 views
Estimation of average rock and asteroid mass associated with different stars
There is a lot of information on different star types and compositions.
Can we make estimates of the total mass of rock, ice, and non stellar matter that orbits stars based on star evolution models?
...
2
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1answer
89 views
How do you determine which star, between two, is more luminous?
For example, if star 1 is 4x bigger than star 2 but both are the exact same temperature how do you determine which is more luminous?
3
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2answers
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How many nested stable (1 Mio years) orbits are theoretically possible?
If we look at our solar system we have the sun which has planet orbits and planets have moon orbits.
If we look at the possible size difference from hypergiants to small asteroids why shouldn't it be ...
2
votes
1answer
344 views
Stellar mass database
I need a stellar mass database that also has the distance of the star/system from the sun. Can anybody tell me the name of such of database and where I can find it. I need to do a project on this. ...
6
votes
1answer
452 views
How do the orbits of Nu Scorpii and AR Cassiopeiae work?
I apologize for the way this question is worded but I don't think I know the proper verbiage. Basically, I want to know how the stars orbit one another in the two septuple star systems. For example, ...
4
votes
1answer
340 views
Do all stars have the potential to have life supporting planets?
Regardless of how big or small, how hot or cold, do all stars have a goldilocks zone, and if so, could any given planet in this zone (with the right configuration) support life?
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1answer
277 views
Why would a star’s position in the sky change relative to another star right next to it? [closed]
I'm curious about stars and I am wondering why a star would change its position in the sky due to another star right next to it?
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2answers
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What qualifies as a local star?
My professor used the term 'local star'. What range of distance is generally considered 'local' for a star? And what would be considered distant?
3
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2answers
239 views
The defintion of star/planetary/solar system
In many science fiction stories, we hear the term star system that mostly refers to a star and its planets. This is often used interchangeably with the term solar system. But after some research I ...
2
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0answers
75 views
Synthesising types of galaxies using various stellar spectra
I have asked this on Physics Stack Exchange but Astronomy is probably more appropriate. I have been given the task of synthesising an elliptical galaxy, a starburst galaxy and a spiral galaxy (...
3
votes
2answers
227 views
Potential Re-Capture of Rogue Planets
Rogue planets can be designated as rogue planets due to one of two possible scenarios: 1) the "rogue planet" formed as a sub-brown dwarf, or 2) the planet was ejected from its home star system. I want ...
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1answer
555 views
Triple Stars v/s Ternary Stars
Ternary (or trinary) stars are not the same as triple stars. So, what is the basic ...
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3answers
338 views
Pulsation Modes of Cepheids
There are various modes of Cepheids like
single modes:
fundamental (F),
first overtone (1O), and likewise.
And then we have
double modes: F/1O, 1O/2O etc.
triple modes: 1O/2O/3O etc.
What ...
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2answers
2k views
How do scientists know there are about 300 billion stars in a galaxy and there are about 100 billion galaxies?
Just to think about this is mind boggling. But how do scientist get these numbers? What technology/system/theory do they they use?
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1answer
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Sources of Turbulence in the ISM
What sources of turbulence exist within the Interstellar medium (ISM)? Which ones are physically the most important for newly forming stellar systems?
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1answer
97 views
Who or what will the Arecibo message reach?
The Arecibo Message was aimed at the globular star cluster M13, but as far as I read, M13 will move out of the original position and thus not be able to receive it. So, who or what will be able to ...
