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Our solar system



Our Solar System:
The Sun is the center of our solar system. It is made of extremely hot gases. Nuclear fusion is the ultimate source of Sun energy generation. Ultimate sources of heat and light of our solar system are Sun.

The Sun, eight planets, satellites and some other celestial bodies such as asteroids and meteoroids form a solar system.

Celestial bodies:
The Sun, the moon, stars, planets, and all those objects shining in the sky either day or night are called celestial bodies.


Stars

The celestial bodies which have their own heat and light, which they emit in a large amount of energy are called Stars. For example, our nearest star is the Sun.


Asteroids:

The celestials body apart from stars, planets, and satellites, there are millions of tiny bodies found between Mars and Jupiter in our solar system which also orbit around the Sun. These are called asteroids.


Meteoroids:
A small piece of rocks that move around the Sun is called Meteoroids. Sometimes these meteoroids come near the earth, when they enter the atmosphere due to friction of air molecules in the atmosphere, they get heated up and burn; it causes a flash of light.

Sometimes meteoroids do not burn completely and create hallow on earth when they fall.


Planets:

Some celestial bodies do not have their own heat and light. Planets lit by the light of stars, such bodies are called planets. For example, Earth, Mars, etc.
Our Star, The Sun has eight planets. There are two types of planets: 
  • Inner planets or terrestrial planet or Earth-like planet: Mercury, Venus, Earth, Mars.
  • Outer planets or Jovian or gas giant planet; beyond the asteroid belt rest of all the 4 planets are the outer planets. Sequence from the sun is Jupiter, Saturn, Uranus, Neptune.
  • Jovian planet is larger in size as compared to the terrestrial planet and has a thick atmosphere mostly made of helium and hydrogen.
Difference between Julian and Terrestrial planets:
  • Terrestrial planets are formed by solid particles whereas Julian is formed by gaseous particles.
  • Solar winds blew off lots of gases and dust from terrestrial planets where similar removal has not happened in Jovian planets.
  • A terrestrial planet is smaller hence lower gravity could not hold the escaping gases.
  • Evolution of earth:

Some important facts about our Solar system:
  • The highest number of the moon( 82 in numbers in 2019): Saturn, Titan is the largest moon of Saturn. 
  • Largest planet: Jupiter 
  • Decrease order of the size of the planet: Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars, mercury. 
  • Lowest density: Saturn, Saturn will float in a large pool of water that means the density of the Saturn is less than the density of the water. 
  • Asteroids belt is found between Mars and Jupiter. 
  • Kuiper belt: areas of the outer solar system. 
  • Comet: it is an icy small body made of dust, icy, gases. When it passes near to the sun, it burned and visible trail may be seen. 
  • Meteor: solid debris originated from asteroid or comet or any others from outer space falling to earth, is called a meteor. 
  • Meteorite: when a meteor enters the earth's atmosphere, it burns due to friction. Some meteor not completely burns and it reaches to earth's surface and is called a meteorite.
For Explanation, please watch below videos:


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Threadlet
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22 October 2020 at 11:40 ×

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