What did Galileo do to advance Science?

Question: What did Galileo do to advance Science!?

I need to what and if possible how and why!.

also, if you can tell me what your source was that would be extremely helpful!.

Thank You Www@QuestionHome@Com

Best Answer - Chosen by Asker:

He was a pioneer in the role of experimentation in the scientific method with his methodical astronomical observations and experiments in the physics of falling bodies!.

This site explains his importance and has a flash recreation of his gravity experiments dropping objects from the Tower of Pisa!.
http://www!.visionlearning!.com/library/mo!.!.!.

This site has other details on Galileo's role in the history of science, including astronomy and development of the scientific method:
http://csep10!.phys!.utk!.edu/astr161/lect/!.!.!.

And I can't help myself, I always have to provide a pertinent Wikipedia link:
http://en!.wikipedia!.org/wiki/History_of_!.!.!.Www@QuestionHome@Com