Why do giant stars become planetary nebulas while supergiant stars become supernovas when their nuclear fusion slows and is overcome by gravity?
Supergiant stars do not have enough mass to generate the gravity necessary to cause a planetary nebula.
Supergiant stars are too massive to have planets and thus do not have planetary nebulas.
Giant stars do not have enough mass to generate the gravity necessary to cause a supernova.
Supernovas require binary star systems to form and giant stars do not form binary star systems.
Supergiant stars do not have enough mass to generate the gravity necessary to cause a planetary nebula.
Supergiant stars are too massive to have planets and thus do not have planetary nebulas.
Giant stars do not have enough mass to generate the gravity necessary to cause a supernova.
Supernovas require binary star systems to form and giant stars do not form binary star systems.
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The reason why giant stars become planetary nebulas is Supergiant stars do not have enough mass to generate the gravity necessary to cause a planetary nebula.
Why do giant stars become planetary nebulae?
A planetary nebula is known to be formed or created by a dying star. A red giant is known to be unstable and thus emit pulses of gas that is said to form a sphere around the dying star and thus they are said to be ionized by the ultraviolet radiation that the star is known to releases.
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