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How are panatery Nebula formed and when do they die

  1. Jun 7, 2012 #1
    My simple question is how are panatery nebula formed.. Al what i know is that after helium fusion is over, some complex process will occur leading to explosion which leads to the nebula... What are these complex processes...Moreover, it appears just like a core of a star surrounded by some dust... And how to they ultimately end becoming a white dwarf?? Thanks in advance... I need answers urgently
     
  2. jcsd
  3. Jun 8, 2012 #2
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