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30 January, 16:39

A planetary nebula forms when the outer layers are expelled from which type of star?

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  1. 30 January, 16:50
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    i think it is a red giant
  2. 30 January, 19:35
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    As the core collapses, the outer layers of the star are expelled. A planetary nebula is formed by the outer layers. The core remains as a white dwarf and eventually cools to become a black dwarf ... A massive star will undergo a supernova explosion
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