Christian Horrebow’s Sunspot Observations – I. Life and Published Writings
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DOI: 10.1007/s11207-019-1465-z
Abstract: Between 1761 and 1776, Christian Horrebow made regular observations of sunspots from Rundetårn in Copenhagen. Based on these observations he writes in 1775 that “it appears that after the course of a certain number of… read more here.
Keywords: observations life; horrebow; sunspot observations; horrebow sunspot ... See more keywords
Christian Horrebow’s Sunspot Observations – II. Construction of a Record of Sunspot Positions
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DOI: 10.1007/s11207-019-1466-y
Abstract: The number of spots on the surface of the Sun is one of the best tracers of solar variability we have. The sunspot number is not only known to change in phase with the 11-year… read more here.
Keywords: record sunspot; variability; sunspot; christian horrebow ... See more keywords