The Radio Sun

  • Jeff Lashley
Part of the Astronomers' Observing Guides book series (OBSERVING)


Our Sun is an ordinary star, and the nearest one to Earth. Its distance from us defines a convenient unit of measure in our Solar System, the astronomical unit, or AU. One AU is approximately 150 million km, which is the mean distance from Earth to the Sun. The solar diameter is 696,000 km, or approximately 0.7 million km, presenting an angular diameter of about 0.5° as seen from Earth’s surface. Its spectral class is G2, and it lies centrally placed on the main sequence of the Hertzsprung–Russell diagram in Fig. 1.1.


Solar Wind Solar Cycle Coronal Mass Ejection Solar Flare Radio Emission 

Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Jeff Lashley
    • 1
  1. 1.Melton MowbrayUK

Personalised recommendations