Life Cycle of a Star and H-R Diagram GN

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What is the life cycle of a star?

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The life cycle of a star includes several stages: Nebula, Main Sequence, Red Giant/Supergiant, and Dying stage (which can lead to a White Dwarf, Neutron Star, or Black Hole depending on the star's mass).

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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.

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What is the Main Sequence stage of a star?

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The Main Sequence is the longest stage in a star's life cycle, where it fuses hydrogen into helium in its core.

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What are Red Giants?

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Red Giants are stars that have exhausted the hydrogen in their cores and have expanded and cooled, resulting in a reddish appearance.

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What are White Dwarfs?

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White Dwarfs are the remnants of low to medium mass stars that have shed their outer layers and left behind a hot core.

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What is the H-R Diagram?

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The Hertzsprung-Russell (H-R) Diagram is a scatter plot of stars showing the relationship between their absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

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What does luminosity measure?

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Luminosity measures how bright a star is, or the total amount of energy it emits per second.

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How does temperature affect a star's color?

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A star's temperature determines its color; hotter stars appear blue, while cooler stars appear red.

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What is a Blue Giant?

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A Blue Giant is a very hot and massive star that is much brighter than the Sun.

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What is a Red Supergiant?

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A Red Supergiant is a very large star that has expanded and cooled, often found at the end of its life cycle.