##First class of Space with Physics##

 
              # # # Space with Physics # # #

As we know that, we live on the Earth, which is present in the  Galaxy  named as Milky Way Galaxy or Akash Ganga. There are 8 planets in our solar system:- Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. All these planets rotates on there own axis and all of these planets revolve around the sun. Sun  is not the planet but it is Star. There is many difference between the Planet and Star.

Planet:- Planets are celestial body which don't emit the light and the energy from the nuclear fusion's reaction. Planets are born usually from supernova remanent or when huge dust clouds collapse under their own gravity. Our big boy Jupiter was formed like this. Rocky planets are also formed like this but they are smaller as it gets difficult to maintain a solid state under such immense pressure and gravity. Kepler 22-b is a good example of how big solid worlds can get.

 

Star:- Stars are celestial body which can emit the light and the energy using the nuclear fusion's reaction. It contain the element's like- Hydrogen, Helium, etc. UY Scuti is the biggest known star. It is also called as the red supergiant star or hypergiant star. It's radius is for about 1700 times more than sun. 

(Fact station):-  1) Stars which we always seeing in the night from our naked eyes, maximum of them are comes under the dwarf star categories.

                           2) Sun is the dwarf star.

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