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8 astronauts joining us today at #openESTEC #WvdW pic.twitter.com/gbBcl9eUYc — ESA (@esa) October 8, 2017

And we're off! Doors are open for the open day at our technical centre in the Netherlands #OpenESTEC #WvdW pic.twitter.com/eQiJPj2KTJ — ESA (@esa) October 8, 2017

Let's GO! The open day at our technical centre in the Netherlands is now officially underway! Follow along via #openESTEC. pic.twitter.com/EIEw49llY1 — ESA (@esa) October 8, 2017

Ready for Open Dag ESA/ESTEC @Wetenschap_NL @ESA_nl #WvdW #OpenESTEC pic.twitter.com/8f78Sn4YOa — André Kuipers (@astro_andre) October 8, 2017

30 mins go! #openESTEC #WvdW pic.twitter.com/h7O5G43Xws — ESA (@esa) October 8, 2017

A warm welcome to all joining us for #openESTEC today! Doors open at 10:00 CEST https://t.co/RuCwTEYMh8 pic.twitter.com/GadWXNU83W — ESA (@esa) October 8, 2017

Where did all the stars go? What used to be considered a hole in the sky is now known to astronomers as a dark molecular cloud. Here, a high concentration […]