Managing Editor Although the United Kingdom’s (UK) “Brexit” departure from the European Union (EU) on Jan. 1 will not affect its membership status in the European Space Agency (ESA), the nation’s participation in a number of European space programs is either ending or being curtailed. On Christmas Eve, the UK and EU announced an agreement in principle that will govern trade, security and political relations after Brexit. Under the agreement, the UK’s participation in the: Galileo satellite navigation and European Geostationary Navigation Overlay Service (EGNOS) program will end; Copernicus Earth observation satellite program will continue, contingent upon a further agreement to be worked out next year; and