Astrophysics: The Life of a Star
How stars are born, shine, and die
1:04 · 720p · With AI narration and captions. This sample was made with the same system as this service.
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The Life of a Star
Let's follow the life of a star, from its birth to its final days.
The Birth of a Star
A cloud of gas and dust shrinks under gravity, and its center heats up. Then hydrogen fusion begins, and a star starts to shine.
Main-Sequence Stars
The pressure of hot gas balances gravity, so the star shines steadily. The Sun's lifespan is about 10 billion years.
Red Giants
When the hydrogen in its core runs out, the star swells into a red giant.
The End of a Sun-like Star
In a star like the Sun, the outer gas spreads out as a planetary nebula, and a white dwarf is left at the center.
The End of a Heavy Star
Heavier stars, over about 8 times the Sun's mass, become red supergiants and explode as supernovae, leaving neutron stars or black holes.
Material for New Stars
Elements scattered by the explosion become material for new stars and planets.
The Life of a Star
The heavier the star, the shorter its life. A star's mass greatly shapes its whole life.
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