This book presented collected articles of the International conference devoted to the 100th anniversary of E.P. Fedorov. This conference was held on June 22-24, 2009 at the Main Astronomical Observatory of National Academy of Science of Ukraine. . During the conference the following problems were discussed: fundamental constants and reference systems in astronomy and geodesy, Earth rotation and geodynamical processes, gravitational fields of the Earth, Moon and Planets, new trends in geody- namycal research. To geologists, geodesists, astronomers and students of these professions.