As 2017 draws to a close we look back at the top moments with our #YearInReview2017 on @youtube https://t.co/5DsNXydR3b — ESA (@esa) December 27, 2017

Thanks for your inspirational STEAM work this year Niamh — ESA (@esa) December 27, 2017

One of the most identifiable nebulae in the sky, the Horsehead Nebula in Orion, is part of a large, dark, molecular cloud. Also known as Barnard 33, the unusual shape […]

14 years since arriving in #Mars orbit, we’re still enjoying fabulous views from Mars Express. #Video collection of new views released this year: https://t.co/P85nh0Thor #OTD #ICYMI #SpaceChristmas pic.twitter.com/YzPivFoQG3 — ESA […]

#BoxingDay 2004 Our #Huygens probe appears to shine as it coasts away from #Cassini in this close-up taken #OTD, as it headed towards the surface of Titan. https://t.co/Lb2LyXdLPH pic.twitter.com/xqQUf00EA0 — […]

ESA/Hubble #Flashback: Hubble view of star-forming region S106 Credit: @ESA @NASA https://t.co/HzHhUfqwA3 pic.twitter.com/IqJXIsgnZ6 — HUBBLE (@HUBBLE_space) December 26, 2017

More from our year in images – see the full #YearInReview at: https://t.co/zvLyR7eFSB pic.twitter.com/8KEDtbOAtc — ESA (@esa) December 26, 2017

An @esa/@NASA solar observatory saw this 'reindeer' on the Sun in 2003! 🦌 The dark area that forms the reindeer is a coronal hole — a magnetically open region on […]