*Planets around the sun move faster in their orbits when they are close to the sun, and slower when they are further away;
*Planets around the sun move faster in their orbits when they are close to the sun, and slower when they are further away;
*There is a definite mathematical relationship between all the planets' distances from the sun and the times in which they orbit.
*There is a definite mathematical relationship between all the planets' distances from the sun and the times in which they orbit.
−
[[Isaac Newton]] (1642-1727) would use both Kepler's laws and Galileo's work on mechanics in his formulations on [[gravity]]; his works and equations would lead directly to the discovery of the planets [[Neptune]] and [[Pluto]].
+
These are known as [[Kepler's laws of planetary motion]]. [[Isaac Newton]] (1642-1727) would use both Kepler's laws and Galileo's work on mechanics in his formulations on [[gravity]]; his works and equations would lead directly to the discovery of the planets [[Neptune]] and [[Pluto]].