🎥 On 25 April @ESAGaia will release an astonishing catalogue with the positions, distances & motions of *more than one billion* stars! A huge leap with respect to the previous catalogue of 100 000 stars made by ESA's Hipparcos mission in the 1990s #WaitingForGaia pic.twitter.com/bVenTxhKrG

— ESA (@esa) April 22, 2018