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. 2009 Oct 28;4(10):e7573. doi: 10.1371/journal.pone.0007573

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Guillaume et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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A. Yearly longitude and latitude of the WR from 1897 to 2008. Coordinates are angular measurement in degree. B. The path of the barycenter of WR from 1897 to 2008. For 5 historical periods, the average barycenter is calculated: (42°31′, 14°31′), (47°26′, 2°53′), (41°13′, 7°15′), (44°01′, 5°09′), (31°10′, 37°17′), respectively (latitude, longitude).

Inline graphic — A. Yearly longitude and latitude of the WR from 1897 to 2008. Coordinates are angular measurement in degree. B. The path of the barycenter of WR from 1897 to 2008. For 5 historical periods, the average barycenter is calculated: (42°31′, 14°31′), (47°26′, 2°53′), (41°13′, 7°15′), (44°01′, 5°09′), (31°10′, 37°17′), respectively (latitude, longitude).