Euclid is an ESA (European Space Agency) astronomy and astrophysics mission designed to help us better understand the nature of dark energy and dark matter. Thales Alenia Space, Joint Venture between Thales (67 %) and Leonardo (33 %) is the prime contractor for the satellite and leads a European industrial consortium with scientific contributions. Euclid will map the general structure of the Universe over 10 billion light years to show its expansion and growth during the last three-quarters of its history. Slated for launch in 2022, Euclid satellite will use a Soyuz rocket from the Guiana Space Center, Europe’s Spaceport in French Guiana, for a six-year mission orbiting around the L2 Lagrange point.