Highlight
Free Access

Fig. 2

image

Drawing of a sunspot group observed in August 1671, as published in number 75 of the Philosophical Transactions, corresponding to August 14, 1671.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.