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The 11‐year and 80‐year cycles in the frequency of sunspots easily visible to the naked eye

 

作者: W. Gleissberg,  

 

期刊: Journal of Interdisciplinary Cycle Research  （Taylor Available online 1973）
卷期: Volume 4, issue 4  

页码: 313-318

 

ISSN:0022-1945

 

年代: 1973

 

DOI:10.1080/09291017309359394

 

出版商: Taylor & Francis Group

 

关键词: Eleven year cycles;eighty year cycles;sunspots

 

数据来源: Taylor

 

摘要:

From the observational material compiled during the period 1874–1971 it becomes evident that the 11‐year and 80‐year cycles can be deduced from the frequency of sunspots easily visible to the naked eye. Thus these solar cycles could have been detected long before the invention of the telescope if in ancient and medieval times attention had been paid to the appearances of conspicuous spots on the sun.

 

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