To celebrate #InternationalDayofHumanSpaceFlight, take time to read messages from space explorers https://t.co/KohKDAj44y (all UN languages) pic.twitter.com/DUemdG6j5B — UNOOSA (@UNOOSA) April 12, 2017

@Jeveka_bv Here's the full #Soyuz undocking and reentry explained https://t.co/l7PocSFMWQ — ESA (@esa) April 12, 2017

On this day 56 yeas ago, Yuri Gagarin became the first human in space aboard Vostok-1. More in our minisite: https://t.co/l3LpC5srMc pic.twitter.com/oGtQN8Vryv — Human Spaceflight (@esaspaceflight) April 12, 2017

Are you following our @esaspaceflight account yet? #InternationalDayofHumanSpaceFlight https://t.co/o7RrfBm0lA — ESA (@esa) April 12, 2017

Every day is human spaceflight day for us! European astronauts on @Space_Station #InternationalDayofHumanSpaceflight https://t.co/DVdHqFrOuk pic.twitter.com/Wtdc97Crz5 — Human Spaceflight (@esaspaceflight) April 12, 2017

Happy #InternationalDayofHumanSpaceflight! 56 yrs after his flight, #Yuri now welcomes the visitors of the European Astronaut Centre 👩‍🚀🚀 pic.twitter.com/5Cs1rMXYqw — ESA Astronaut Centre (@ESA_EAC) April 12, 2017

It’s #InternationalDayofHumanSpaceFlight! 56 years ago today Soviet cosmonaut Yuri Gagarin was 1st human in space https://t.co/JwGHfxTikE pic.twitter.com/jcDvUcIlOb — UNOOSA (@UNOOSA) April 12, 2017

Sometimes you almost recognise countries better by night: Belgium with its illuminated roads appears yellow, Germany has bluer lights pic.twitter.com/xONmqvt7fi — Thomas Pesquet (@Thom_astro) April 11, 2017

Meet the fleet. New artist impressions of our #BepiColombo spacecraft. Gallery: https://t.co/6ndnlBjnZg pic.twitter.com/ug2YAVk62d — BepiColombo (@BepiColombo) April 12, 2017