GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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nebula
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main sequence
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red giant
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planetary nebula
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Detailed explanation-1: -The Sun is currently a main sequence star and will remain so for another 4-5 billion years. It will then expand and cool to become a red giant, after which it will shrink and heat up again to become a white dwarf . The white dwarf star will run out of nuclear fuel and slowly cool down over many billions of years.
Detailed explanation-2: -Main-Sequence Lifespan Relative to other stages in a star’s “life” it is extremely long; our Sun took about 20 million years to form but will spend about 10 billion years (1 × 1010 years) as a main sequence star before evolving into a red giant.
Detailed explanation-3: -Giant Gas Cloud. Protostar. T-Tauri Phase. Main Sequence. Red Giant. The Fusion of Heavier Elements. Supernovae and Planetary Nebulae.