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Calling all #nightsky photographers! Have you entered the biggest international #astrophotography competition yet? #astrophoto2018 is open for entries. Find out more: https://t.co/3RCTLF7bAR pic.twitter.com/BRnLhnpc1b — Royal Observatory (@ROGAstronomers) January 21, 2018

We're celebrating 10 years of the European Columbus laboratory on 7 February – stay tuned and follow #Columbus10years https://t.co/Px0oVR6bit pic.twitter.com/vAzSpejT3g — ESA (@esa) January 21, 2018

#ICYMI This week's #EarthFromSpace features northern #Brazil’s Marajó island https://t.co/lrniF9Hy0f — ESA (@esa) January 21, 2018

Maybe this video from @Paxi_ESAKids is a good place to start? https://t.co/xPnKVU9qDp — ESA (@esa) January 21, 2018

Yes, but can your blizzard do this? In Upper Michigan’s Storm of the Century in 1938, some snow drifts reached the level of utility poles. Nearly a meter of new […]

Primary and secondary school #teachers are invited to apply to take part in our @ESA__Education robotics and automation workshopsMore details: https://t.co/USyAZgpOLl pic.twitter.com/zq8Ls4S2Ta — ESA (@esa) January 20, 2018

Our week in #space images – including simulating space plasma heating, #Brazil's Marajó island and the Large Space Simulator https://t.co/rz6dxNlmQx pic.twitter.com/KCDb03yhFp — ESA (@esa) January 20, 2018

#OTD 4 years ago, 20 Jan 2014, at 10.00 CET, #ESA's #Rosetta woke up to begin next stage of its historic journey: to become 1st spacecraft to rendezvous with a […]

#OTD in 2014! #WakeUpRosetta https://t.co/ZxjR0YKr0s — ESA (@esa) January 20, 2018