Deserts and voids – by @astro_luca in @ESA_CAVES blog https://t.co/17XLN38ly9 pic.twitter.com/jmCbWPjCvc
— ESA (@esa) January 22, 2017
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Deserts and voids – by @astro_luca in @ESA_CAVES blog https://t.co/17XLN38ly9 pic.twitter.com/jmCbWPjCvc
— ESA (@esa) January 22, 2017