Type II Supernova | Astronomy - Britannica

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major reference

• In supernova: Type II supernovae

  The so-called classic explosion, associated with Type II supernovae, has as progenitor a very massive star (a Population I star) of at least eight solar masses that is at the end of its active lifetime. (These are seen only in spiral galaxies,…

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cosmic rays

• In cosmic ray: Origin of cosmic rays

  …massive evolved stars, such as Type II, or core-collapse, supernovas and Wolf-Rayet stars that are found in groups of young, hot stars called OB associations.

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