Astronomy and Astrophysics – Astronomy
Scientist
Astronomy and Astrophysics
Astronomy
Scientist
Sterrewacht Leiden, P.O. Box 9513, 2300 RA Leiden, the Netherlands
A new photo-electric method of classification of luminosity and spectral type for O-and B-type stars
Five channel photometric observations of stars in the Magellanic Clouds and in the Milky Way
Five-colour observations of 24 classical Cepheids
Five-colour photometry of OB-stars in the Southern Hemisphere
Some features of the Leiden radial velocity instrument.
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