Tuesday, January 08, 2008

What is Core of sun?

The core of the Sun is considered to make bigger from the center to about 0.2 solar radii. It has a mass of capable of 150,000 kg/m3 (150 times the density of water on Earth) and a temperature of about to 13,600,000 kelvins (by compare, the surface of the Sun is close to 5,785 kelvins (1/2350th of the core)). Through the majority of the Sun's life, energy is formed by nuclear fusion through a series of steps called the p-p (proton-proton) chain; this method converts hydrogen into helium. The core is the only spot in the Sun that produces a large amount of heat via fusion: the rest of the star is heated by energy that is transferred outward from the core. All of the energy formed by fusion in the core must travel through many repeated layers to the solar photosphere before it escapes into space as sunlight or kinetic energy of particles.

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