Wanneer begint de lente?   Meteosat-4 artificially-coloured visible channel full-disc Earth image, 6 July 1991. Developed by ESA and since 1995 operated by Eumetsat, Meteosat has been routinely returning Earth imagery from geostationary orbit since 1977. (Credit: ESA/Eumetsat) Kalender     Earth view taken from American shuttle, during the mission on board of ESA’s (European Space Agency) astronauts. Release date: 20 maart 2002