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(1 - 16 of 16)
U Trianguli Australis, a classical Cepheid with secondary period
Oosterhoff, P.T. 1957
U Trianguli Australis, a classical Cepheid with secondary period
Article / Letter to editor
open access
The distribution of atomic hydrogen in the outer parts of the Galactic System
Westerhout, G. 1957
The distribution of atomic hydrogen in the outer parts of the Galactic System
Article / Letter to editor
open access
Photo-electric light-curves in blue and yellow light of the eclipsing variable RR Trianguli Australis
Kwee, K.K.; Oosterhoff, P.T.; Volders, L.M.J.S. 1957
Photo-electric light-curves in blue and yellow light of the eclipsing variable RR Trianguli Australis
Article / Letter to editor
open access
Observations of two occultations of the Crab nebula by the Moon at 400 Mc/s
Seeger, C.L.; Westerhout, G. 1957
Observations of two occultations of the Crab nebula by the Moon at 400 Mc/s
Article / Letter to editor
open access
The distribution of mass in M 31
Schmidt, M. 1957
The distribution of mass in M 31
Article / Letter to editor
open access
Corrections of 21-cm line profiles
Ollongren, A.; Hulst, H.C. van de 1957
Corrections of 21-cm line profiles
Article / Letter to editor
open access
The light-variation and the radial-velocity curve of TU Cas explained in terms of a primary period and a beat period
Oosterhoff, P.T. 1957
The light-variation and the radial-velocity curve of TU Cas explained in terms of a primary period and a beat period
Article / Letter to editor
open access
Preliminary observations of 21-cm emission from M 33
Raimond, E.; Volders, L.M.J.S. 1957
Preliminary observations of 21-cm emission from M 33
Article / Letter to editor
open access
A catalogue of 21-cm line profiles
Muller, C.A.; Westerhout, G. 1957
A catalogue of 21-cm line profiles
Article / Letter to editor
open access
Rotation and density distribution of the Andromeda nebula derived from observations of the 21-cm line
Hulst, H.C. van de; Raimond, E.; Woerden, H. van 1957
Rotation and density distribution of the Andromeda nebula derived from observations of the 21-cm line
Article / Letter to editor
open access
Some radial velocity measurements of the Cepheid U TrA
Laustsen, S. 1957
Some radial velocity measurements of the Cepheid U TrA
Article / Letter to editor
open access
Three new variable stars
Laustsen, S. 1957
Three new variable stars
Article / Letter to editor
open access
Spiral structure in the inner parts of the Galactic System derived from the hydrogen emission at 21-cm wavelength
Schmidt, M. 1957
Spiral structure in the inner parts of the Galactic System derived from the hydrogen emission at 21-cm wavelength
Article / Letter to editor
open access
The polarization and intensity distribution in the Crab nebula derived from plates taken with the 200-inch telescope by Dr. W. Baade
Woltjer, L. 1957
The polarization and intensity distribution in the Crab nebula derived from plates taken with the 200-inch telescope by Dr. W. Baade
Article / Letter to editor
open access
A search for atomic hydrogen in the II (ζ) Persei and the I Lacertae associations of O and B stars
Raimond, E. 1957
A search for atomic hydrogen in the II (ζ) Persei and the I Lacertae associations of O and B stars
Article / Letter to editor
open access
Photo-electric observations of the polarization and surface brightness of the Crab nebula made at the Observations de Haute Provence
Walraven, T. 1957
Photo-electric observations of the polarization and surface brightness of the Crab nebula made at the Observations de Haute Provence
Article / Letter to editor
open access