Despite the fact that the law of gravitation was discovered more than 300 years ago, gravity remains the most mysterious physical phenomenon in physics and cosmology. For a long time, the force of gravitational interaction was represented by only one physical law: Newton's law of gravitation F = GMm/r^2. Newton's law of gravitation is not enough to fully describe gravity. Newton's law shows the force of gravitational interaction of two bodies out of all N bodies in the Universe. The formula of Newton's law describes gravity only to one local source of attraction and does not take into account that bodies simultaneously gravitate to all other bodies in the Universe. In gravity, at least three more laws of gravity have not been discovered. The secrets of gravity are revealed by the inverse N-body problem. The solutions to the inverse N-body problem are at least 4 laws of gravity. The solution of the inverse N-body problem for N = 2 yields two laws of gravity: Newton's law F = GMm/r^2 and a new law of gravity F = mR^3/T^2r^2. We also show that the solution of the inverse N-body problem for N → ∞ yields the third and fourth laws of gravity: F = (mc^2)√Ʌ, F = mGmе/αrе^2. Newton's law F = GMm/r^2 and the new law of gravity F = mR^3/T^2r^2 give the gravitational force of two bodies. The third and fourth laws of gravity F = (mc^2)√Ʌ, F = mGmе/αrе^2 give an additional gravitational force of N bodies in the Universe. Three new physical laws appeared in gravity in addition to Newton's law. They were missing in Newtonian dynamics. The new laws of gravity complement Newtonian dynamics and give a complete and consistent description of gravity.