Eutelsat 21B is a French communications satellite providing direct to home broadcasting services from geostationary orbit at 21.5 degrees East, replacing the aging Eutelsat 21A. Star One C3 is a communications satellite replacing Brasilsat B3 in the 75 degrees West position.
Ariane 5 is a heavy-lift launch vehicle, part of the Ariane rocket family.
Arianespace SA is a multinational company founded in 1980 as the world's first commercial launch service provider. It undertakes the production, operation, and marketing of the Ariane programme. Their vehicles launch exclusively from French Guiana in South America.INFO WIKI