He didn't alter them. He showed that his theory of planetary motion under gravity was consistent with them.
Isaac Newton
he supported his ways and thiught of better ways to replace keplers half right ways
Newton derived Keplars findings from Newton's Theory of Gravity. Thus, newton 'explained' the basis for Keplars findings and extended them.
Mindboggling? They are "Laws of Planetary Motion". So I guess the answer is "motion".
Issac Newton had three laws of motion i believe thats all the laws he had werer those three
Newton's Laws are describing acceleration, an element of motion.
If you google "Isaac Newton laws" you will get all three immediately.
Sir Isaac Newton (1642-1727), English mathematician and physicist.
Celestial objects in orbit.
Isaac Newton described three laws of motion.
Newton's three laws of motion.
Newton's Laws are the Laws of Missiles!