Prometheus is an ultra-low cost reusable rocket engine demonstrator that uses liquid oxygen–methane propellants and will power Europe’s future launchers.
ESA and ArianeGroup are developing a full-scale demonstrator to be ground tested in November 2020.
On 14 December 2017, a contract worth €75 million was signed by ESA Director of Space Transportation, Daniel Neuenschwander, and Alain Charmeau, CEO at ArianeGroup, at ESA headquarters in Paris in the presence of ESA Director General Jan Wörner.