Abstract
OTTO STRUVE'S DOUBLE-STAR MEASURES.—The most important addition to double-star astronomy during the last year is without doubt the work which we owe to Otto Struve, and which is entitled “Mesures Micrométriques des Étoiles Doubles” (Observations de Poulkova Tome IX. (avec un supplement) et Tome X.). The period which the observations cover is very large when one considers that it is for one observer, commencing as it does with the observations made in the year 1837, when Otto Struve was only seventeen years old. Readers who are unable to approach these volumes themselves will find that M. Bigourdan, in the October number of the Bulletin Astronomique gives a general summary of the whole of the contents. As one would expect, the introductions to the volumes contain a mine of important information, both with regard to the measures and to the puzzling question of the “personal equation,” a question on which even to-day astronomers hold different views. Otto Struve busied himself especially in this direction, making, in the years 1853-1876, a series of measures of artificial double stars. The expressions for the corrections which he obtained assumed considerable proportions, as will be seen below, the first being that for angles of
Article PDF
Rights and permissions
About this article
Cite this article
Our Astronomical Column. Nature 49, 111 (1893). https://doi.org/10.1038/049111a0
Issue Date:
DOI: https://doi.org/10.1038/049111a0