HR Diagram and Life Cycle of a Star

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What is the Big Bang Theory?

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The Big Bang Theory is the leading explanation for the origin of the universe, stating that it began from a singular point and has been expanding ever since.

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What is the life cycle of a star?

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The life cycle of a star includes stages such as nebula, main sequence, red giant, and potentially ending as a white dwarf, neutron star, or black hole.

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What is a nebula?

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A nebula is a giant cloud of dust and gas in space, where stars are born and can also be the remnants of dead or dying stars.

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What is the Main Sequence?

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The Main Sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness, where most stars, including the Sun, are found.

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What are supergiants?

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Supergiants are among the largest stars in the universe, significantly more massive than the Sun, and they have short life spans.

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What is an irregular galaxy?

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An irregular galaxy is a type of galaxy that does not have a distinct regular shape, often containing a mix of stars, gas, and dust.

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What is a black hole?

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A black hole is a region in space where the gravitational pull is so strong that nothing, not even light, can escape from it.

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What is a red giant?

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A red giant is a late stage in the life cycle of a star, where it expands and cools after exhausting the hydrogen in its core.

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What is a white dwarf?

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A white dwarf is a small, dense star that is the remnant of a low or medium mass star after it has exhausted its nuclear fuel.

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What is the difference between a spiral galaxy and an elliptical galaxy?

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Spiral galaxies have a flat, rotating disk with arms, while elliptical galaxies are more rounded and lack the distinct structure of spiral arms.