It appears there might be some confusion about the life cycle of stars, particularly our Sun. Here’s a clearer overview of what scientists expect to happen:
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Current Stage: The Sun is currently a main-sequence star, and it has been in this stable phase for about 4.6 billion years. It will remain in this phase for roughly another 5 billion years.
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Red Giant Phase: After it exhausts its hydrogen fuel, the Sun will enter the red giant phase. This will occur in about 5 billion years. During this phase, the Sun will expand significantly and its outer layers will be ejected, creating a planetary nebula.
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White Dwarf: After shedding its outer layers, what remains of the Sun will be its core, which will cool and shrink into a white dwarf. It will not become a black hole because it does not have enough mass.
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Black Holes: Black holes typically form from the remnants of massive stars (much larger than our Sun) after they undergo supernova explosions. The Sun lacks the mass required to become a black hole.
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Galaxies and Expansion: While the Sun will contribute to the formation of new stars and materials in its vicinity after its death, it will not create a new galaxy or expand the existing one on its own.
In summary, after 5 billion more years, the Sun will not become a black hole, but rather will evolve into a red giant and ultimately become a white dwarf. The concept of a "black hole star" does not apply to our Sun, as it doesn't meet the criteria to become a black hole.