On the planetary theory of sunspots

Emile Okal*, Don L. Anderson

*Corresponding author for this work

Research output: Contribution to journalLetterpeer-review

28 Scopus citations


IT has been proposed1,2 that sunspot activity is affected by positions of the planets, and calculations have been presented3, which purport to show that planetary tides on the Sun vary in the same way as the sunspot variations. We believe that the apparent agreement of the sunspot cycle with planetary tidal effects is an artefact of the calculation.

Original languageEnglish (US)
Pages (from-to)511-513
Number of pages3
Issue number5492
StatePublished - Dec 1 1975

ASJC Scopus subject areas

  • General


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