What is the difference between copernicus's and kepler's description of planetary orbits

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

14,16 18 reacts with group

the dissolution of polymer can be thermodynamically described in 2 steps.

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)