NASA's Next-Level Discovery: Webb Exposes Dazzling Interstellar Web of Dust

3 comments

• verzali 5 hours ago
  Here's the original article, without the odd chatgpt headlines:

  https://www.stsci.edu/contents/news-releases/2025/news-2025-...
• hinkley 11 hours ago
  So what does this do to our estimates of the ratio of regular matter in the universe?
• perihelions 15 hours ago
  Is there an animation or blink visualization of this time evolution?
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  • cwmoore 12 hours ago
    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."