There are billions of stars in the sky, with the sun being the closest to Earth among them. It lies at the center of the solar system. For every 27 days, the sun rotates once. It was formed about four and a half billion years ago. It is determined that the sun is at middle of its life, meaning that it shall shine for about 5 billion more years.
The surface of the sun is called photosphere. The temperature of the photosphere is 5,778 K. It is, however, much hotter at the core of the sun, being 15.7 million K. The energy is produced via a process known as nuclear fusion. This involves 2 hydrogen nuclei joining to form 1 helium nucleus, releasing energy.
The sun is 149.6 million kilometers from the earth. Its diameter is 1.392 million kilometers, which reflects an equatorial circumference of 4.379 million kilometers. Compared to the corresponding measurements of the earth, these are 109 times more. The surface area of the sun is 6.0887 trillion kilometer square, about 11,990 times the earth. Its volume exceeds that of earth by 1.3 million.
The heat from the sun reaches the earth through radiation. This energy is known as solar energy. Note that the planet absorbs only a small portion of this energy, the rest is reflected back to space. The absorbed heat is responsible for life on earth. It is also the source of the earth's climate, wind trends and water cycle.
Plants make their own food through photosynthesis, a process that is dependent on solar energy. Take note that all living organisms get their food directly or indirectly from plants. In addition, the sun is the cause of energy available in fossils. Examples of such energy sources are petroleum and coal.
The sun is earth's basic source of energy. This energy reaches us in two main forms, light and heat. Solar energy is also applied in promoting plant growth in green houses, solar lighting and powering electronic devices. There cannot be life on earth without the sun.
The surface of the sun is called photosphere. The temperature of the photosphere is 5,778 K. It is, however, much hotter at the core of the sun, being 15.7 million K. The energy is produced via a process known as nuclear fusion. This involves 2 hydrogen nuclei joining to form 1 helium nucleus, releasing energy.
The sun is 149.6 million kilometers from the earth. Its diameter is 1.392 million kilometers, which reflects an equatorial circumference of 4.379 million kilometers. Compared to the corresponding measurements of the earth, these are 109 times more. The surface area of the sun is 6.0887 trillion kilometer square, about 11,990 times the earth. Its volume exceeds that of earth by 1.3 million.
The heat from the sun reaches the earth through radiation. This energy is known as solar energy. Note that the planet absorbs only a small portion of this energy, the rest is reflected back to space. The absorbed heat is responsible for life on earth. It is also the source of the earth's climate, wind trends and water cycle.
Plants make their own food through photosynthesis, a process that is dependent on solar energy. Take note that all living organisms get their food directly or indirectly from plants. In addition, the sun is the cause of energy available in fossils. Examples of such energy sources are petroleum and coal.
The sun is earth's basic source of energy. This energy reaches us in two main forms, light and heat. Solar energy is also applied in promoting plant growth in green houses, solar lighting and powering electronic devices. There cannot be life on earth without the sun.
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