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.
ArianeGroup (formerly Airbus Safran Launchers) is an aerospace company based in France. A joint venture between Airbus and Safran, the company was founded in 2015 and is headquartered in Issy-les-Moulineaux. It consists of three core arms: aerospace, defence and security.INFO WIKI