I told him 93,000,000 miles would be about right. Our sun , a hydrogen fusion power plant , is perhaps the best nuclear power plant we could hope to benefit from. It has a life expectancy of 3,000,000,000 years or more as opposed to the 20 year breakdown of a conventional U235 or Plutonium based plant. Steel steam pipes which crack upon exposure to radiation will never be a problem on the sun. All life on Earth depends on energy from the sun.
Solar energy is the source of energy for photosynthesis .
It provides the warmth necessary for plants and animals to survive. The heat from the sun causes water on the Earth's surface to evaporate and form clouds that eventually provide fresh rainwater. Solar energy is the result of thermonuclear fusion reactions deep within the sun . Even though solar energy is the largest source of energy received by the Earth, its intensity at the Earth's surface is actually very low due to the large distance between the Earth and the sun and the fact that the Earth's atmosphere absorbs and scatters some of the radiation. Even on a clear day with the sun directly overhead, the energy that reaches the Earth's surface is reduced about 30 percent by the atmosphere.