Herschel is a space observatory for the ESA. It is a infrared telescope and the largest ever launched to date. NASA is however a partner in this mission. Planck is also an ESA space observatory but maps cosmic microwave background.
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