[HN Gopher] Webb Telescope detects most distant active supermass...
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       Webb Telescope detects most distant active supermassive black hole
        
       Author : wglb
       Score  : 29 points
       Date   : 2023-07-07 00:19 UTC (22 hours ago)
        
 (HTM) web link (phys.org)
 (TXT) w3m dump (phys.org)
        
       | brucethemoose2 wrote:
       | Thats a mere 0.17 AU, inside the orbit of mercury and smaller
       | than some stars:
       | 
       | https://www.vttoth.com/CMS/physics-notes/311-hawking-radiati...
        
         | djmips wrote:
         | The one in the Milky way is small as well
        
       | gremlinsinc wrote:
       | how does it know there isn't one further out past the observable
       | universe? OR Does Webb actually see 100 percent of the entire
       | universe?
        
         | jperras wrote:
         | "Further out past the observable universe" pretty much doesn't
         | matter (hah), by definition.
        
         | doctoboggan wrote:
         | No, by definition we only see the observable universe like you
         | noted, but most people assume there is more out there beyond
         | it. In fact, by the Copernican principle we should assume there
         | is more out there, otherwise we happen to find ourselves
         | exactly in the center of everything and can see exactly as far
         | as light could have traveled in the known age of the universe.
         | 
         | The title is a little unclear, but I read it as the most
         | distant _known_ supermassive black hole. This is the farthest
         | one we 've detected, but we can assume there are further ones
         | (even some that may still be detected by Webb in the future)
        
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       (page generated 2023-07-07 23:00 UTC)