Shake it, blast it, unfurl it – a look at European service module tests for @NASA_Orion done @NASAglenn Plum Brook: https://t.co/XUP6PXtqxf pic.twitter.com/hyh0F49AWy — Human Spaceflight (@esaspaceflight) December 21, 2016

Now serving its first users worldwide, #Galileo #satnav is shaping up to be a powerful tool for scientists:https://t.co/i1svY5uiAO pic.twitter.com/9uoFXvxdZn — ESA Technology (@ESA_Tech) December 21, 2016

#OTD 21 Dec 2011 Exp 30/31 to @Space_Station @astro_andre Kuipers @astro_Pettit & Oleg Kononenko @NASAhistory @esaspaceflight @SRON_Space pic.twitter.com/3kdfCRsN3E — ESA space history (@ESA_History) December 21, 2016

5 yrs ago. Ready for launch Soyuz TMA-3M @astro_Pettit Oleg Kononenko pic.twitter.com/1SY8tLezOc — André Kuipers (@astro_andre) December 21, 2016

The #wintersolstice marks the point at which the Sun is exactly overhead the Tropic of Capricorn. This year it happens today at 10:44 GMT pic.twitter.com/Q8nvFa8Omm — Met Office (@metoffice) December […]

The Exp 50 crew from France, Russia and U.S. heads into holidays with muscle study and Earth observations. https://t.co/XeGRzFHGMs pic.twitter.com/QkliOMubJR — Intl. Space Station (@Space_Station) December 20, 2016

Happy birthday, Melfi! This fridge has been keeping things cool on the @space_station for 10 years now. Well done @airliquidegroup! pic.twitter.com/MSJ48BmPnd — Thomas Pesquet (@Thom_astro) December 21, 2016

Winter moon – @esaoperations image of the week https://t.co/Ahld4LCi9L pic.twitter.com/dvQ4TSFE20 — ESA (@esa) December 21, 2016

Watch tonight's #Ariane5 #VA234 on @arianespace TV. The launch window opens at 20:30 UTC https://t.co/6NbQXJTXtr https://t.co/buegBrlg8C — ESA (@esa) December 21, 2016

What's cooking @Thom_astro ? https://t.co/V463A4pvyr — ESA (@esa) December 20, 2016