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Zeipel Hugo von (08.02.1873 - 08.06.1959)
Born in Stockholm. He graduated from Uppsala University. In 1898, 1901 and 1902, he participated in scientific expeditions to Spitsbergen. In 1901–1902 worked at the Pulkovo Observatory, in 1904–1906 - in the Paris Observatory under the direction of A. Poincare. Since 1904 - Associate Professor at Uppsala University, since 1911 - Astronomer-Observer at the Uppsala Observatory, since 1920 - Professor at Uppsala University. Scientific works are devoted to celestial mechanics and stellar astronomy. Developed the theory of perturbed motion as applied to periodic comets and asteroids. He proposed a new method for separating short-and long-period motions in Hamiltonian systems such as celestial mechanics systems (the “Zeipel method”), which is effectively used in calculating the motion of natural and artificial celestial bodies.Investigated the patterns of distribution of stars in globular clusters and developed a method for determining the relative masses of stars within clusters. He also studied the internal structure of stars, star photometry, the study of variable stars. Theoretically predicted the effect of "gravitational darkening" - the temperature difference between the equator and the poles - in rapidly rotating stars. One of the founders of the Swedish Astronomical Society, its president in 1926-1935, a member of many foreign scientific societies. In 1938 he retired. Died in Uppsala, Sweden. Glacial valley on the western side of the Eustfjord in Viidefjord Bay, Gustav V Land, Northeast Land Island, Spitsbergen. The coordinates are 78° 50'N 15° 30'E. The northern entrance cape of the Palander Bay on Earth Gustafa Adolf, the island of Northeast Earth, Svalbard. Coordinates 79° 40'N 20° 30'E. Bay on the western coast of the Laponia Peninsula, Gustav V Land, Northeastern Land Island, Svalbard. The coordinates are 80° 20'N 19° 30'E. |
