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MAGNIFICIENCE OF UNIVERSE - Coggle Diagram
MAGNIFICIENCE OF UNIVERSE
OUR UNIVERSE
The universe is a huge space which contains everything that exists. The celestial bodies that we see are just a small fraction of the bodies that exist in the universe.
One of the reasons why we do not see more of them is that they are very, very far away.
The natural bodies in the sky are called celestial bodies or heavenly bodies. They are part of our universe
stars and solar system
LIGHT YEARS
To measure the large distances in the universe, scientists use a unit of length called the light year.
A light year is the distance travelled by light in one year. Light travels 9.46 trillion km in a year
One light year represents this huge distance. Proxima Centauri, the star closest to our solar system, is 4.2 light years from us.
This means that light from this star takes 4.2 years to reach us.
THE BIG BANG!!
A long time after the big bang, stars like our sun were formed. At that time, clouds of hot gases and particles revolved around the sun.
Over time, many particles got stuck together to form large bodies. These bodies pulled in smaller objects near them by gravitational force. This made them larger still.
Scientists believe that the universe was born after a massive explosion called the ‘big bang’.
These bodies finally became the planets.
THE STARS
Stars are celestial bodies that produce their own heat and light. Planets and their moons shine by reflecting the light of a star such as our sun.
In a star, hydrogen gets converted into helium. In this reaction, a large amount of energy is liberated. This is the source of the heat and light of a star
. Stars vary in brightness and size
Some are medium-sized, like our sun. Some are so huge that if they were to be placed in our sun’s position, they would fill the entire solar system!