Hi, I need some help. What are Sir Isaac Newton's three law of motions? Why do you think his ideas change science/astronomy/the world?

Hi, I need some help.

1. What are Sir Isaac Newton's three law of motions?
2. Why do you think his ideas change science/astronomy/the world?
3. Please give your opinion on which idea was the most important, support your opinion in detail, and why do you think it is important?
4. Why is the three law of motions related/benefit to Astronomy?