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Nuclear fusion

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  • Why do we get energy from the Sun?

  • All those systems need power, and that power comes from the sun. The sun is an enormous nuclear power source — through complex reactions, it transforms hydrogen into helium, releasing light and heat. Because of these reactions, every square meter of our planet’s surface gets about 342 Watts of energy from the sun every year.

  • What is the power of the Sun?

  • The Power of the Sun. The sun is the closest star to Earth. Even at a distance of 150 million kilometers (93 million miles), its gravitational pull holds the planet in orbit. It radiate s light and heat, or solar energy, which makes it possible for life to exist on Earth. Plants need sunlight to grow.

  • How much energy does the Sun produce per year?

  • The sun is an enormous nuclear power source — through complex reactions, it transforms hydrogen into helium, releasing light and heat. Because of these reactions, every square meter of our planet’s surface gets about 342 Watts of energy from the sun every year.

  • What is the importance of the sun to the Earth?

  • The Sun is the source of most of the energy on Earth–the power source for plants, the cause of flows of atmosphere and of water, the source of the warmth which makes life possible. None would exist without it.

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