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Galaxy clusters like the one in this photo retain the title of the biggest structures in the Universe bound by gravity. #ESA #Hubble Picture of the Week by @ESA / […]

Want to attend the #UNISPACE50 Symposium but missed the deadline? Good news! We’ve extended the registration period until 23 April: https://t.co/3Wc1Lt2cxY pic.twitter.com/pj46fqtLO7 — UNOOSA (@UNOOSA) April 8, 2018

What are you going to do with all these stars (& other sources) after the 2nd @ESAGaia data release? We'd love to hear from the #astronomy community what you're most […]

One of the objectives of the NASA/ESA/CSA James Webb Space Telescope: https://t.co/c7u7s2D6xf — ESA (@esa) April 8, 2018

#ICYMI In this week's #EarthFromSpace, explore southern Siberia and the world’s largest freshwater lake: Lake Baikal 🎥 Watch: https://t.co/Zo3HaMUx98📷 Explore the image: https://t.co/OgDn95F44O pic.twitter.com/idKnrqPn1A — ESA (@esa) April 8, 2018

Don't miss our NEW collection in the #ESAshop – exclusively for children – called 'Adventure in Space'. Items include bodysuits and bibs for toddlers and t-shirts for older kids. https://t.co/zk0fIUgXyD […]

… Acting as a cosmic lens, galaxy cluster MACS J1149-2223 has helped astronomers find the most distant star ever discovered, which existed 4.4 billion years after the Big Bang.Read more: […]

In a correction to yesterday's week in images – this @HUBBLE_space image shows the huge galaxy cluster MACS J1149.5+223, whose light took over 5 BILLION years to reach us. Explore […]