Unaided-eye Sunspot Observations in 1769 November: A Comparison of Graphical Records in the East and the West
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DOI: 10.1007/s11207-019-1488-5
Abstract: Sunspots can be seen with the unaided eye when they are sufficiently large. Due to the known correlation between the occurrence of unaided-eye sunspot observations and the phase of the solar cycle, these observations frequently… read more here.
Keywords: 1769 november; unaided eye; eye sunspot; sunspot observations ... See more keywords