The need for an alternative source of energy was never as important for mankind as it is today. Fossil fuels, which are being used since thousands of years, are about to get exhausted. More importantly, they are contributing to various hazards on the planet, prominent ones being global warming and pollution. In such a scenario, searching for an alternative source of energy, which is a clean, efficient and renewable energy, has become the utmost priority for mankind. One such source of energy is solar energy. Before we move on to how solar energy works, we need to know what is solar energy and whether it's the right alternative source of power.

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加热，太阳的能量太阳能热 (热) energy is often used for heating water used in homes and swimming pools and for heating the insides of buildings ("space heating"). Solar space heating systems can be classified as passive or active. Passive space heating is what happens to your car on a hot summer day. The sun's rays heat up the inside of your car. In buildings, the air is circulated past a solar heat surface and through the building by convection (meaning that less dense warm air tends to rise while denser cool air moves downward). No mechanical equipment is needed for passive solar heating. Active heating systems require a collector to absorb and collect solar radiation. Fans or pumps are used to circulate the heated air or heat absorbing fluid. Active systems often include some type of energy storage system.

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Coal, petrol, diesel, kerosene, natural gas - all of them are nothing but finite sources of energy. The rate at which they are being used by people all over the world, they are surely on the verge of drying up sooner than later. So, is there a solution to this problem? Well, yes there is. Didn't we all learn way back in school about wind, water and sunlight being sources of renewable energy? And how wind energy, hydro energy and solar energy would in time prove to be the only solution to man's energy woes? Yes we did. In spite of both wind and hydro energy regularly being used all over the world in quite a few application areas, it is in fact solar energy that is being targeted as having the highest potential among all three. Therefore, on that note, let us have a look at a few solar energy pros and cons.

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Solar energy is by far the Earth's most available energy source. Solar power is capable of providing many times the total current energy demand. But it is an intermittent energy source, meaning that it is not available at all times. However, it can be supplemented by thermal energy storage or another energy source, such as natural gas or hydropower.

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Energy from the Sun The sun has produced energy for billions of years. Solar energy is the sun

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The Sun, just another star in the Milky Way, is an indispensable part of the solar system supporting all the life forms on Earth from a distance of about 150 million kilometers. Owing to the magnanimity of its light and heat, the Sun serves as a wonderful source of energy. Being able to harness its energy free of cost, is perhaps one of the greatest things we Earthlings are blessed with.

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大多数人都知道，太阳耀斑是什么, 但很少有人知道有关一个非常罕见的，但非常强大的太阳耀斑 - 一 "超级太阳耀斑。" 一个超级太阳耀斑是强大的核电磁脉冲 (NEMP) 发生时是引爆了一个核装置. 一个超级太阳耀斑或核爆电磁脉冲，可能会严重集世界许多, 多年来至于技术方面. Our earth's atmosphere protects us and our equipment from regular solar flares, 但可以很容易地渗透超级太阳耀斑. 这可能会破坏一切，从我们的现代电子电网.

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