Astronomy in a nutshell, the chief facts and principles explained in popular language for the general reader and for schools (1912)
Serviss, Garrett Putman, 1851-1929, Rouben Mamoulian Collection (Library of Congress) DLC · New York, London, G.P. Putnam's sons · leaf 96
use theearths poles to describe a slightly wavingcurve instead of a smooth circle round thepoles of the ecliptic. There are about1400 of these waves, or nods, in themotion of the poles in the course of their26,000-year circuit. In accurate observationthe astronomer is compelled to take accountof… … The Great Southern Star-Cluster w Centauri Photographed by S. I. Bailey at the South American Station ofHarvard Observatory.Note the streaming of small stars around the cluster. The cluster itselfis globular and its stars are too numerous to be counted, or even to be sepa-rately distinguished in…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
