[HN Gopher] NASA's Next-Level Discovery: Webb Exposes Dazzling I...
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       NASA's Next-Level Discovery: Webb Exposes Dazzling Interstellar Web
       of Dust
        
       Author : Brajeshwar
       Score  : 27 points
       Date   : 2025-01-18 15:00 UTC (8 hours ago)
        
 (HTM) web link (scitechdaily.com)
 (TXT) w3m dump (scitechdaily.com)
        
       | perihelions wrote:
       | Is there an animation or blink visualization of this time
       | evolution?
        
         | cwmoore wrote:
         | There is an 11 second video across a few weeks embedded. From
         | the caption:
         | 
         | "This time-lapse video using data from NASA's James Webb Space
         | Telescope highlights the evolution of one light echo in the
         | vicinity of the supernova remnant Cassiopeia A. A light echo is
         | created when a star explodes or erupts, flashing light into
         | surrounding clumps of interstellar dust and causing them to
         | shine in an ever-expanding pattern."
        
       | hinkley wrote:
       | So what does this do to our estimates of the ratio of regular
       | matter in the universe?
        
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       (page generated 2025-01-18 23:02 UTC)