T: What Stars Are We Seeing Between Galaxies?

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Discussion Overview

The discussion centers on the presence and visibility of stars located between galaxies, exploring whether these stars are common or if most stars reside within galaxies. Participants examine the challenges of observing solitary stars in intergalactic space and the implications of recent research on the topic.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants suggest that the majority of stars are found within galaxies, with a few being ejected into intergalactic space.
  • There is a consensus that observing solitary stars outside of our galaxy is extremely difficult due to their faintness and the limitations of current telescopes.
  • One participant notes that stars outside of galaxies are likely those ejected by interactions with massive bodies, such as black holes.
  • Another participant references recent research indicating that stars between galaxies might be more common than previously thought, though they regard this work as speculative.

Areas of Agreement / Disagreement

Participants generally agree that most stars are within galaxies and that solitary stars in intergalactic space are challenging to observe. However, there is disagreement regarding the prevalence of stars between galaxies, with some suggesting they may be more common based on recent studies.

Contextual Notes

The discussion highlights the difficulty in observing extragalactic stars and the speculative nature of recent findings, which may depend on specific definitions and assumptions about star formation and ejection processes.

thetexan
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Are there very many stars (percentage wise) between galaxies?

Or are most of the stars within galaxies?

I guess my main question is when we see stars that are not in our galaxy are we probably looking at a distant galaxy?Tex
 
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The majority of stars are inside of galaxies, though there are some that get ejected and drift through intergalactic space.

thetexan said:
I guess my main question is when we see stars that are not in our galaxy are we probably looking at a distant galaxy?

Most likely, yes. Though keep in mind that it is very, very difficult to observe solitary stars outside of our own galaxy. Only the largest telescopes have the resolution and light gathering power to see them.
 
Last edited:
The only stars likely to exist outside of galaxies are those that have been ejected from their host galaxy via an encounter with a very massive body, like a black hole. As Drakkith noted, it is not easy to count extragalactic stragglers because individual stars are incredibly faint at intergalactic distances.
 

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