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The New Cosmos pp 119-123 | Cite as

Distances, Absolute Magnitudes and Radii of the Stars

  • Albrecht Unsöld
Part of the Heidelberg Science Library book series (HSL)

Abstract

As a result of the revolution of the Earth round the Sun, in the course of a year a nearer star must describe a small ellipse in the sky relative to the much more distant fainter stars (Fig. 14.1: to be distinguished from aberration, Fig. 5.7). Its semi-major axis, which is the angle that the radius of the Earth’s orbit would subtend at the star, is called the heliocentric or annual parallax p of the star to and fro motion).

Keywords

Absolute Magnitude Distance Modulus Photometric System Neutral Metal Bolometric Magnitude 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag New York Inc. 1969

Authors and Affiliations

  • Albrecht Unsöld
    • 1
  1. 1.Institute for Theoretical Physics and University ObservatoryKielGermany

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