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(1 - 20 of 34)

Pages

On the system of astronomical constants (edited and completed by DIRK BROUWER, with the aid of notes by - (Errata: 10 146)
Sitter, W. de; Brouwer, D. 1938
On the system of astronomical constants (edited and completed by DIRK BROUWER, with the aid of notes by - (Errata: 10 146)
Article / Letter to editor
open access
On distance, magnitude, and related quantities in an expanding universe
Sitter, W. de 1934
On distance, magnitude, and related quantities in an expanding universe
Article / Letter to editor
open access
On the expanding universe and the time-scale
Sitter, W. de 1933
On the expanding universe and the time-scale
Article / Letter to editor
open access
On the motion and the mutual perturbations of material particles in an expanding universe
Sitter, W. de 1933
On the motion and the mutual perturbations of material particles in an expanding universe
Article / Letter to editor
open access
Some further computations regarding nonstatic universes
Sitter, W. de 1931
Some further computations regarding nonstatic universes
Article / Letter to editor
open access
Do the galaxies expand with the universe?
Sitter, W. de 1931
Do the galaxies expand with the universe?
Article / Letter to editor
open access
The expanding universe. Discussion of Lemaître's solution of the equations of the inertial field (Errata: 5 V)
Sitter, W. de 1930
The expanding universe. Discussion of Lemaître's solution of the equations of the inertial field (Errata: 5 V)
Article / Letter to editor
open access
On the magnitudes, diameters and distances of the extragalactic nebulae and their apparent radial velocities (Errata: 5 V, 230)
Sitter, W. de 1930
On the magnitudes, diameters and distances of the extragalactic nebulae and their apparent radial velocities (Errata: 5 V, 230)
Article / Letter to editor
open access
Further remarks on the astronomical consequences of the theory of the expanding universe
Sitter, W. de 1930
Further remarks on the astronomical consequences of the theory of the expanding universe
Article / Letter to editor
open access
The longitudes of Jupiter's satellites derived from plates taken with the 26-inch telescope of the Yale Observatory Southern Station
Alden, H.L.; Sitter, W. de; Pels, G. 1929
The longitudes of Jupiter's satellites derived from plates taken with the 26-inch telescope of the Yale Observatory Southern Station
Article / Letter to editor
open access
The longitudes of Jupiter's satellites derived from plates taken with the 26-inch telescope of the Yale Observatory Southern Station in 1928
Alden, H.L.; Sitter, W. de; Pels, G. 1929
The longitudes of Jupiter's satellites derived from plates taken with the 26-inch telescope of the Yale Observatory Southern Station in 1928
Article / Letter to editor
open access
Report of the Director of the Observatory at Leiden for the year 1927
Sitter, W. de 1928
Report of the Director of the Observatory at Leiden for the year 1927
Article / Letter to editor
open access
On the longitude of the Sun in the years 1864-1900 and the rotation of the Earth (Errata: 4 70, 94)
Sitter, W. de 1927
On the longitude of the Sun in the years 1864-1900 and the rotation of the Earth (Errata: 4 70, 94)
Article / Letter to editor
open access
On the secular accelerations and the fluctuations of the longitudes of the Moon, the Sun, Mercury and Venus (Errata: 4 70)
Sitter, W. de 1927
On the secular accelerations and the fluctuations of the longitudes of the Moon, the Sun, Mercury and Venus (Errata: 4 70)
Article / Letter to editor
open access
Summary of the results derived from a discussion of the longitudes of Jupiter's satellites, with special reference to the rotation of the Earth (Errata: 3 V)
Sitter, W. de 1927
Summary of the results derived from a discussion of the longitudes of Jupiter's satellites, with special reference to the rotation of the Earth (Errata: 3 V)
Article / Letter to editor
open access
Further note on the causes of the discontinuous changes of the Earth's rotation and their possible effect on the intensity of gravity
Sitter, W. de 1927
Further note on the causes of the discontinuous changes of the Earth's rotation and their possible effect on the intensity of gravity
Article / Letter to editor
open access
On the most probable values of some astronomical constants, first paper, constants connected with the Earth
Sitter, W. de 1927
On the most probable values of some astronomical constants, first paper, constants connected with the Earth
Article / Letter to editor
open access
Report of the Director of the Observatory at Leiden for the year 1926
Sitter, W. de 1927
Report of the Director of the Observatory at Leiden for the year 1926
Article / Letter to editor
open access
The latitudes of Jupiter's satellites derived from photographic plates taken at the Royal Observatory, Greenwich, in the years 1918-19 (Errata: 3 V)
Sitter, W. de; Pels, G. 1926
The latitudes of Jupiter's satellites derived from photographic plates taken at the Royal Observatory, Greenwich, in the years 1918-19 (Errata: 3 V)
Article / Letter to editor
open access
The longitudes of Jupiter's satellites derived from photographic plates taken at the Royal Observatory, Cape of Good Hope, in 1924
Sitter, W. de; Pels, G. 1926
The longitudes of Jupiter's satellites derived from photographic plates taken at the Royal Observatory, Cape of Good Hope, in 1924
Article / Letter to editor
open access

Pages