New citizen science project 'Sunspot Detectives' kicks off on the zooniverse.org platform. Anyone can examine the drawings resulting from the daily observations of the Sun carried out by the Jesuit scientist Angelo Secchi and his collaborators between 1853 and 1878.
The collection contains probably the most complete set of sunspot data from the 19th century. The over 5,400 drawings, made in pencil on sheets of paper, document with thin lines the size, shape and position of all the sunspots.