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#Sputnik – 60 years of the #spaceage #sputnik60 https://t.co/cIWNGOPylL pic.twitter.com/6S1xKlcvQ0 — ESA (@esa) October 4, 2017

This 20 m resolution #LandCover classification map of #Africa is formed by 180 000 @CopernicusEU #Sentinel2 images:https://t.co/aP7AR6Pqc8 pic.twitter.com/6jRV8wCOzc — ESA EarthObservation (@ESA_EO) October 3, 2017

FOUR days til #OpenESTEC, also marking 10 years of ESA's hypergravity centrifuge, generating up to 20G for testing https://t.co/FLiOuKKUX8 pic.twitter.com/6C7TN1YQWT — ESA Technology (@ESA_Tech) October 4, 2017

Enjoy computing? Then it's time to enter the @astro_pi challenge & get your code into space! #MissionZero guarantees all entries to the #ISS https://t.co/3OG6xLJB43 — Tim Peake (@astro_timpeake) October 4, […]

#OTD 4 Oct 1957, #Sputnik1 launched by #USSR, marking the dawn of the #SpaceAge – listen to its signal @SoundCloud https://t.co/zMyq4Fv5f4 — ESA Operations (@esaoperations) October 4, 2017

Привет Москва и Санкт-Петербург! // Ciao Moscow and Saint Petersburg! // Ciao Mosca e San Pietroburgo! #VITAmission #Russia pic.twitter.com/Ozac6KlMDh — Paolo Nespoli (@astro_paolo) October 3, 2017

#OTD 4 October 1957, Sputnik-1 l was launched by Soviet Union, marking dawn of the #SpaceAge #Sputnik60 https://t.co/BFYBgm0Ncg — ESA (@esa) October 4, 2017