Free Access

Fig. 1


View of the MW based on the model of Vallée et al. (2005). The position of Tr 20, indicated with a filled blue circle, is based on the results of this analysis. The ⊙ symbol at the centre of the figure marks the position of the Sun, while the different approximate position of the spiral arms are marked with coloured stripes.

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.