  We explain the solution of the following two problems: obtaining of Kepler's
laws from Newton's laws (so called two bodies problem) and obtaining the fourth
Newton's law (the formula for gravitation) as a corollary of Kepler's laws.
  This small book is devoted to the scholars, who are interested in physics and
mathematics. We also make a series of digressions, where explain some technique
of the higher mathematics, which are used in the proofs.
