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 intersting 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.

 

[pmacias]

Dear [Name],

Thank you for your interest in the structure of galaxies. I am happy to share some information with you.

Firstly, galaxies are massive systems of stars, gas, dust, and dark matter that are held together by gravity. They come in various shapes and sizes, such as spiral, elliptical, and irregular. The most common type of galaxy is the spiral galaxy, which has a central bulge surrounded by a disk of stars and gas.

The process that caused galaxies to form is still not fully understood, but it is believed to have started with the Big Bang, the event that created the universe. As the universe expanded, matter began to clump together due to gravity, forming galaxies. Over time, these galaxies continued to grow and evolve through interactions with other galaxies and the surrounding environment.

One of the most intriguing aspects of galaxies is their rotation. The laws of physics, specifically Newton's laws of motion, explain why galaxies rotate. As stars and gas in a galaxy orbit around its center, they experience a centrifugal force that balances out the gravitational pull towards the center, allowing the galaxy to maintain its shape and structure.

Another interesting feature of galaxies is their supermassive black holes. Most galaxies, including our own Milky Way, have a supermassive black hole at their center. These black holes have such strong gravitational pull that they can affect the motion of stars and gas in the galaxy.

In addition to these scientific facts, galaxies also hold a great deal of beauty and mystery. They are home to billions of stars and planets, and some may even harbor life. The study of galaxies continues to fascinate and challenge scientists, and there is still much to learn about these vast and complex systems.

I hope this information has provided some insight into the structure of galaxies and the laws behind them. If you have any further questions, please do not hesitate to ask.

Sincerely,