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The sun is 4.5 billion years old, and it's only in the second stage of it's life!

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Created from the collapse of a giant star. Tiny, but dense.

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Type of star that can be a normal main sequence star, or stars that are expanding red giants.

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Brown dwarf=star that never reached nuclear fusion.

White dwarf=star that is the remnants of a collapsed red giant.

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Dwarfs are smaller stars that are usually red or yellow.

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The star will start to produce iron, which will make the star collapse. The size of the collapse will depend on the size of the star.

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When a main sequence star becomes a red giant, it can become 10x larger than the sun!

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When the hydrogen runs out, the star's outside expands and becomes a red giant.

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Fun Fact #2: 90% of stars are main sequence

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Fun Fact #2: 90% of stars are main sequence

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Once the star is born, it will burn energy until it dies. During it's lifeline, gravity will be trying to crush the star, while heat is trying to make it grow bigger. Gravity and the heat of the star will finally find a 'happy medium' and stay balanced until the star runs out of oxygen.

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1 year=150 billion stars
1 day= 400 million stars
1 second=4,800

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Stars are born in huge clouds of dust called nebulae. Gravity attracts more of the dust together. The dust then becomes so heavy and hot that it turns into a Protostar. When more dust and heat gets to the center of the Protostar, nucleus fusion will begin and the star is then born to the universe.