On-line Archive
Historical literature
In this section, you can find links to historical works that contain information about sunspots and solar observations.
Modern papers
In this section, you can find links to recent articles and books related to historical sunspot observations.
Miscellaneous
Miscellaneous section of this on-line archive.
Data
Data section of this on-line archive. You can download several data files about historical sunspot observations.
Sunspot drawings
You can find a collection of historical sunspot drawings in this section.
Strach’s collection
You can find the solar observation notebooks by Eric H. Strach from 1969 to 2008 in this section.