Sunspots
The cyclic variation of the number of sunspots was first observed by Heinrich Schwabe between 1826 and 1843
Follow Samuel Heinrich Schwabe through 1 dated historical records for Germany.
A chronological timeline drawn from matching World History Database records.
The cyclic variation of the number of sunspots was first observed by Heinrich Schwabe between 1826 and 1843
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.