Thor's Helmet: Pre-Supernova with Emissions Nebula?”

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SUMMARY

Thor's Helmet (NGC 2359) is identified as a pre-supernova star surrounded by an emissions nebula, indicating that it is in a late evolutionary stage. This phenomenon occurs as giant stars, like NGC 2359, lose their outer envelopes before undergoing a supernova event. The discussion highlights Eta Carinae as a comparable example of a pre-nova star exhibiting similar characteristics.

PREREQUISITES
  • Understanding of stellar evolution and life cycles of massive stars
  • Familiarity with emissions nebulae and their formation
  • Knowledge of supernova mechanisms and classifications
  • Awareness of specific astronomical objects like NGC 2359 and Eta Carinae
NEXT STEPS
  • Research the characteristics and lifecycle of NGC 2359
  • Study the formation and properties of emissions nebulae
  • Explore the evolutionary stages of massive stars leading to supernovae
  • Investigate Eta Carinae and its significance in stellar evolution
USEFUL FOR

Astronomers, astrophysics students, and anyone interested in the life cycles of massive stars and the phenomena associated with pre-supernova stages.

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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?
 
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Don't know the specific object but giant stars lose their outer envelopes in the late stages of evolution.
 
mgb_phys said:
Don't know the specific object but giant stars lose their outer envelopes in the late stages of evolution.

Right. See Eta Carinae as an example of just such a pre-nova star.
 

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