Look out for @Thom_astro 's new book, released on 23 Nov 🌎 https://t.co/wUAsdz2Oz5
— ESA (@esa) October 30, 2017
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Michigan Astronomy Observing
Look out for @Thom_astro 's new book, released on 23 Nov 🌎 https://t.co/wUAsdz2Oz5
— ESA (@esa) October 30, 2017