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Stability of Stars

Which of the ...

Question

Which of the following always try to balance each other, during a star's life?

Gravitational force and gaseous pressure

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Star's brightness and gravitational force

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Gaseous pressure and star's brightness

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Star's rotation and gaseous pressure

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Solution

The correct option is A Gravitational force and gaseous pressure
The higher the density and the temperature of a star are, the higher the star's pressure and output energy would be. A star remains stable, as long as the gravity of the star pulling in, is balanced by the star’s energy and pressure pushing out. A star’s life is a constant tug-of-war between the inward gravity and the outward pressure and energy.
If there were no such delicate balance in the Sun, it would actually collapse and disintegrate into space in a matter of few hours.

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