Radial Velocities of Twenty Stars Having Spectra of the Orion Type (Classic Reprint) - Hardcover

Inhaltsangabe

Excerpt from Radial Velocities of Twenty Stars Having Spectra of the Orion Type

The next great advance was made by Campbell in his design of and work with the Mills spectro graph of the Lick Observatory, described in the Astrophysical Journal, Vol. VIII pp. 123 - 56. The use of iron as a comparison spectrum (previously tried by Vogel and by Deslandres, but not regularly employed by them), together with the closest attention to the optical and mechanical construction of the instrument and great refinement in the measurement of the plates, enabled Campbell to increase greatly the accuracy of the determinations, so that the natural unit became the kilometer per second, instead of the sevenfold greater German geographical mile employed by Vogel.

About the Publisher

Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com

This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Die Inhaltsangabe kann sich auf eine andere Ausgabe dieses Titels beziehen.