3D flight through star cluster Westerlund 2 — fast. Source caption is in Engliish here https://t.co/8GcXjDez1I
— ESA (@esa) November 22, 2017
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3D flight through star cluster Westerlund 2 — fast. Source caption is in Engliish here https://t.co/8GcXjDez1I
— ESA (@esa) November 22, 2017