What Surname Was Shared By Annie And Edward, A 'Power Couple' Of British Astronomy In The Late 19th And Early 20th Centuries? A So-Called 'Minimum' Of Sunspot Activity From 1645 To 1715 Is Named In Their Honour.

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1. What Surname Was Shared By Annie And Edward, A 'Power Couple' Of British Astronomy In The Late 19th And Early 20th Centuries? A So-Called 'Minimum' Of Sunspot Activity From 1645 To 1715 Is Named In Their Honour.