Question

21) What are kepler's laws?

22) What is the difference between a "planet" and a "dwarf planet?"

Answer 1

Kepler’s first law states that, all planets are revolved around the sun in an elliptical orbit. Here, the sun is placed at one of the focus of the ellipse.

Kepler’s second law states taht the line joining between planet and the sun always sweeps over equal areas in time intervals.

Kepler’s third law states that the square of the period of the planet is directly proportional to the cube of the average distance between sun and the planet.

the differences between planet and dwarf planet are:

planet has large size whereas dwarf planet had smaller size.

the other is area that surrounds the dwarf planet or the planet each and every planet had cleared the complete area around its path.

whereas the dwarf planet hasn't cleared the area around its path

planet has unique path, but dwarff do not have unique path.