The giant star cycle is the sequence of changes that occurs during the star existence. Among the options, B is correct. Nebula, star of one stellar mass, supernova, black hole.
What is the formation sequence of a giant star?
The evolutive stages of a giant star are
- Nebula: Stars are born from the nebula which is the dust and gas particles condensation due to the gravity effect in the interstellar clouds
- Protostar: It is a more advanced level of condensation.
- Main sequence. Equilibrium between gravity and nuclear fusion helps the star keep stable as long as the fuel lasts. The two main types are
→ Yellow supergiant. Extremely short phase. Almost no stars are known to be in this stage. The star swells on its way to becoming a red supergiant.
→ Red supergiants are the largest stars in terms of volume, but not in mass.
- Supernova. When fuel is over in the red supergiants, the gravitational collapse produces a violent explosion originating the supernova.
- Neutron star. These are more compact forms of the supernova stars. They can end in being black holes.
Amont the options, the correct one is B. Nebula, star of one stellar mass, supernova, black hole.
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