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Every object that we see in space such as Sun, Moon, and planets are called celestial bodies.
The solar system is the collection of the sun, 8 planets, moons, meteors, and asteroids.
The celestial bodies, which are made of gases and have their own heat and light, are called stars. Sun is also a star.
The star which is found in the north direction and never changes its position in the sky is called Pole Star. In ancient times people used to find direction with the help of this star.
The group of stars that form various patterns in the night sky is called a constellation.
For example, Ursa major or big bear is a constellation.
The celestial bodies, which do not have their own heat and light, are called planets. They receive their light and heat from stars.
There are eight planets in our solar system:
Orbit: The fixed on which all the planets revolve around the sun is called the orbit.
The sun is a star, which has its own heat and light. It is also known as the giant ball of fire. The distance between the sun and the earth is 150 million kilometers.
The earth is the third nearest planet to the sun. It is the only planet where life is found. Its shape is Geoid and it is the fifth-largest planet in our solar system. It is also called the blue planet.
The moon is the only natural satellite of the earth. It is 3,84,400 km away from us. It takes 27 days to revolve around the earth and the same amount of time to rotate on its axis; hence, we see only one side of the moon.
The celestial bodies that are found between the orbits of Mars and Jupiter are called asteroids. These are giant rocks that also revolve around the sun.
Meteors are small pieces of Rock that also revolve around the sun. Sometimes these rocks enter the earth's atmosphere and burn completely before reaching the earth's surface.
A galaxy is a collection of millions or billions of stars, clouds, and dust. The name of our Galaxy is the Milky Way galaxy is also called Akash Ganga.
The universe is the collection of millions of billions of galaxies.