A star with a mass 40 times that of the Sun will undergo several stages in its life cycle. The following stages are applicable:
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Main Sequence: The star will spend a significant amount of time fusing hydrogen into helium in its core, just like other stars.
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Red Giant: As the star exhausts its hydrogen fuel, it will expand and cool to become a red giant.
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Blue Giant: Given its high mass, it may also transition to a blue supergiant stage as it continues to fuse heavier elements.
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Neutron Star: Following the supernova explosion, if the remnant core is between about 1.4 to 3 solar masses, it can become a neutron star.
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Black Hole: If the remnant core exceeds this mass limit, it will collapse into a black hole.
The relevant stages for a star with 40 times the mass of the Sun would be:
- Main Sequence
- Red Giant
- Blue Giant
- Neutron Star
- Black Hole
White dwarf is not a stage expected for a star of this mass; it would not go through this stage.
In summary, the correct stages from the list provided are:
- Main Sequence
- Red Giant
- Blue Giant
- Neutron Star
- Black Hole