SOLAR SYSTEM

Detailed explanation-1: -One hour of sunlight is almost equivalent to one year’s Energy consumed by the earth. About 174000 terawatt Energy hit the earth’s surface daily as Solar radiation even on cloudy days.

Detailed explanation-2: -We observe the sun throughout the day from every part of the earth, but it isn’t all at the same intensity. To make it a useful unit, scientist and engineers have defined it to be something standard. A “Sun-Hour” is “1000 watts of energy shining on 1 square meter of surface for 1 hour”.

Detailed explanation-3: -To put that in numbers, from the US Department of Energy: Each hour 430 quintillion Joules of energy from the sun hits the Earth. That’s 430 with 18 zeroes after it! In comparison, the total amount of energy that all humans use in a year is 410 quintillion Joules.

Detailed explanation-4: -According to the U.S. Department of Energy, 430 quintillion Joules of energy from the sun hits the earth each hour; humans use 410 quintillion Joules a year, and the average American household uses about 40 billion Joules of electricity.

Detailed explanation-5: -The sun releases energy at a mass–energy conversion rate of 4.26 million metric tons per second, which produces the equivalent of 384.6 septillion watts (3.846×1026 W).

Detailed explanation-6: -Most of the solar radiation is absorbed or reflected by the atmosphere. The small amount that reaches the planet is mostly absorbed or reflected by bare ground and water. Only a small fraction of energy reaches photosynthetic organisms. Of that, only 1 to 2 percent of the solar energy is converted to chemical energy.