Calling space stamp collectors! Of if you just need to post a postcard from Germany, get ready for December. The German Ministry of finance has announced that a #Gaia stamp will be issued on 7 December 2017, featuring the ESA mission. The stamp will be the first German stamp to have a metallic coating. Along with the Gaia stamp, another astroPhysics stamp will come out, highlighting gravitational waves… See https://www.cosmos.esa.int/web/gaia/iow_20171027
