Structure of galaxy and the laws behind it

[shivakumar06]

dear sir,
i want to know the structure of the galaxies. the process that caused it happen.and finally some peculiar and interesting about galaxy.

 

[Simon Bridge]

(Sounds like homework to me.)

Those are great things to want to know - but it's a pretty big topic, so we will need more from you to guide replies.
What have you found out so far?

 

[shivakumar06]

dear sir,
i have limited knolwedge of physics. i can say i know physics as much have physics student of intermediate level. i took math as a subject of study for graduation.

 

[Simon Bridge]

It will be tricky to answer your question then, since what you are after involved post-graduate college physics.
That's about 4-5years of specialist study to make up?

The short answer is that galaxies form from the law of gravitation in combination with Newton's laws... but nobody knows the exact details. Please see:
http://science.howstuffworks.com/dictionary/astronomy-terms/galaxy3.htm

BTW: you don't have to put "dear sir" at the start of everything - we are all friends here.