Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Thor's Helmet

  1. Jun 17, 2009 #1
    I read that Thor's helmet (NGC 2359) is in a pre-supernova stage, but there is an emissions nebula around it. How this possible if the star is hasn't gone supernova?
     
  2. jcsd
  3. Jun 17, 2009 #2

    mgb_phys

    User Avatar
    Science Advisor
    Homework Helper

    Don't know the specific object but giant stars lose their outer envelopes in the late stages of evolution.
     
  4. Jun 17, 2009 #3

    negitron

    User Avatar
    Science Advisor

    Right. See Eta Carinae as an example of just such a pre-nova star.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook