The Sun and bodies revolving around it, which includes 8 planets, satellites, comets, meteors and asteroids, together constitute the solar system. The source of energy for the sun is the nuclear fusion reaction in which Hydrogen changes into Helium.
The part of the sun that we can see in known as photosphere. The outer most part of the sun, which is visible only at the time of a solar eclipse, is known as corona. A storm of hot atoms which dissipates from the photosphere of the Sun, overcomes its gravity and goes into the outer space, is known as Solar Flares. When Solar Flares reach the Earth's atmosphere, after colliding with the air and dust particles, it produces a spectacular colourful effect. In the North-Pole region, this effect can be seen as Aurora Borealis and in the South-Pole region as Aurora Australis. The regions from where the solar flares originate, some dark spots are seen, these are called Sun Sport. ISRO (Indian Space Reserch Organisation) is planning to launch a satellite called Aditya to study the sun. Time taken by the light to reach the earth form sun is 8 min 18 sec.
These are the celestial bodies, originating from the sun and are revolving around it. They do not have their own light and receive light and heat from the Sun. All the planets revolve round the sun from west of east. But, Venus and Uranus are the exceptions, which revolve around the sun from east to west. 'Terrestrial Planet' are Mercury, Venus, Earth and Mars because of their structure being similar to that of the Earth. 'Jovian Planets' are Jupiter, Saturn, Uranus and Neptune bacause their structures are similar to the Jupiter.
These are the celestial bodies which revolve their respective planets and around the sun as well. Like planets, satellites also do not have their own light and shine with the light of sun. Like planets, their orbits are also elliptical.
These are found between the orbits of Mars and Jupiter. These are celestial bodies with sizes ranging from a few meters to hundreds of the kilometres of diameter, revolving around the sun. They have originated by the disintegration of the planets.
1. Jupiter 2. Saturn 3. Uranus 4. Neptune 5. Earth 6. Venus 7. Mars 8. Mercury
1. Jupiter 2. Saturn 3. Neptune 4. Uranus 5. Earth 6. Venus 7. Mars 8. Mercury
1. Earth 2. Mercury 3. Venus 4. Mars 5. Neptune 6. Jupiter 7. Uranus 8. Saturn
1. Mercury 2. Venus 3. Earth 4. Mars
1. Jupiter 2. Saturn 3. Uranus 4. Neptune
1. Mercury 2. Venus 3. Earth 4. Mars 5. Jupiter 6. Saturn 7. Uranus 8. Neptune
Meteors are the celestial bodies composed of dust and gases. After coming under the influence of earth's gravity, they move with a great velocity towards the earth. But, due to collision with the particles of the atmosphere they burn and get converted into ash. Meteors which are large in size and do not burn completely and reach the surface of the earth are called meteorites.
There are the bodies composed of dust, ice and gases, which come from the colder and darker areas, away from the sun. They go around the sun in large and irregular orbits. While moving in their orbits, when they come very close to the sun, they start glowing with a bright gaseous tail always pointing away from the sun. Many a times, comets are visible to the naked eye and present a very spectacular sight. Comet Halley, discovered by Edmund Halley, returns after every 76 years.
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