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| Paper: |
The Solar Sunspot Periodicity |
| Volume: |
335, The Light-Time Effect in Astrophysics: Causes and Cures of the O - C diagram |
| Page: |
199 |
| Authors: |
Sterken, C. |
| Abstract: |
We give a short account of the history of sunspot observations, and of historic studies of the sunspot period. Using a compilation of sunspot index numbers, the variability of the sunspot cycle is discussed from an instructive point of view and as a demonstration of the O – C method applied to a unique database covering more than three centuries of a standardised variability index. |
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