NOW: press conf with @astro_alex on his upcoming mission (in German) https://t.co/wKa9L1L60e
— ESA (@esa) May 29, 2017
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Michigan Astronomy Observing
NOW: press conf with @astro_alex on his upcoming mission (in German) https://t.co/wKa9L1L60e
— ESA (@esa) May 29, 2017