Press Release
Free Access

Fig. 1


Photographic image of Barnard 68 from Digitized Sky Survey. Barnard (1905) already argued that the “uniform width” and “twistings and turnings of dark lanes” including this one “must have some meaning beyond mere chance”. (57′ × 57′, center (17h24m, −24°), north up, east left.)

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.