Estonia and Finland, we need you. You're the only two @esa countries left to submit code for @astro_pi Mission Zero. Follow the link, submit your code and let's make history. You have until 26 November to take part. Go go go!https://t.co/RmkWwSJugN pic.twitter.com/xWtKfMM8RS

— Raspberry Pi (@Raspberry_Pi) November 15, 2017