Questions tagged [star-systems]
Questions regarding two or more stars gravitationally bound to each other
11
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3answers
4k views
Why are there no stars visible in cislunar space?
It’s very puzzling that the moon landing had no stars in the background, the ISS clips have no stars in the background. I listened to multiple astronaut interviews speak on what it looks like up in ...
1
vote
0answers
19 views
Data on galactocentric distances of various stars?
I'm creating a project for my astronomy class (introductory course) that requires knowledge of the galactocentric distances for many stars. I'm struggling to find a good source on this, and I'd rather ...
3
votes
0answers
77 views
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 ...
0
votes
1answer
108 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?
6
votes
2answers
215 views
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 ...
1
vote
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? ...
1
vote
2answers
70 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 ...
0
votes
2answers
56 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
vote
1answer
95 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 ...
1
vote
1answer
74 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
votes
2answers
380 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)...
-1
votes
1answer
71 views
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
votes
1answer
59 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 ...
0
votes
1answer
35 views
Star revolving a star [duplicate]
Are there any star system(planet system) where a star revolves around a star? Is it theoretically possible?
0
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1answer
86 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.
8
votes
2answers
3k views
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
votes
2answers
177 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 ...
1
vote
2answers
108 views
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 ...
-1
votes
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
votes
1answer
181 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 ...
1
vote
1answer
214 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 ...
0
votes
2answers
134 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
100 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 ...
0
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1answer
187 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.
0
votes
1answer
232 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 ...
-4
votes
1answer
153 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
votes
1answer
125 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
votes
1answer
314 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
votes
1answer
107 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
votes
1answer
716 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)
1
vote
2answers
373 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
319 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
votes
2answers
251 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
votes
2answers
192 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 ...
1
vote
1answer
71 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
votes
1answer
117 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
votes
1answer
91 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
votes
2answers
78 views
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
373 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
478 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
355 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?
-2
votes
1answer
288 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?
1
vote
2answers
98 views
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
votes
2answers
243 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
votes
0answers
81 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
233 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 ...
3
votes
1answer
599 views
Triple Stars v/s Ternary Stars
Ternary (or trinary) stars are not the same as triple stars. So, what is the basic ...
4
votes
3answers
399 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 ...
11
votes
2answers
3k 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?
