What is the primary energy source of young stars in the solar system?

Solar radiation
Gravitational energy
Fusion of hydrogen into helium
Nuclear fission

1 answer

The primary energy source of young stars in the solar system is fusion of hydrogen into helium. During the main sequence phase of a star's life, it fuses hydrogen atoms in its core to produce helium, releasing a significant amount of energy in the form of light and heat. This process is what powers the star and allows it to shine.

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