How Far Can We See the Brightest Known Star?

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The discussion focuses on how far we can see the brightest known star using current technology. Key factors include the aperture of the collection system, surface area for capturing photons, and the necessity of being outside Earth's atmosphere for optimal visibility. The Hubble Space Telescope (HST) is highlighted for its effectiveness due to its position in space. The visibility is influenced by the star's luminosity and the distance photons must travel. Additionally, modern observations are enhanced by using radio and UV/X-ray detectors alongside traditional visual systems.
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A recent (dumb) question that came to mind. Perhaps I posted in the wrong place recently. Given the brightest known star. What is the maximum distance we would be able to see it given current technology. Is there a rule or something? Say the divergence of photons vs initial brightness (magnitude)? Thanks guys!
 
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BosonJaw said:
A recent (dumb) question that came to mind. Perhaps I posted in the wrong place recently. Given the brightest known star. What is the maximum distance we would be able to see it given current technology. Is there a rule or something? Say the divergence of photons vs initial brightness (magnitude)? Thanks guys!
It has to do with the aperture of the collection system and really the surface area catching the photons, as well as getting outside the atmosphere. The HST has bee very successful since it is out in space, and not on the ground. The number of photons reaching the observer is a function of luminosity (number/rate of photons moving per solid angle of space and the distance they have to travel).

But then we also supplement the visual systems with radio and UV/X-ray detectors.
 
Thank you!
 

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