NLP, Python.
'European_Union_Space_Programme', 'Expendable_launch_system', 'Fédération_Aéronautique_Internationale', "Gagarin's_Start", 'Geocentric_orbit', 'Geosynchronous_orbit', 'Ground_segment', 'Ground_station', 'Guidance,_navigation,_and_control', 'Inter-satellite_service', 'Intergalactic_travel',