Arianespace's Ariane 5 rocket launches with NASA's James Webb Space Telescope onboard on the 25th of December 2021, from the ELA-3 Launch Zone of Europe's Spaceport at the Guiana Space Centre in Kourou, French Guiana. JWST is an infrared telescope launched on 25th of December 2021. It has a 6.5-metre-diameter mirror, with which it will study the formation of stars and planetary systems, and the history of the universe. By using infrared wavelengths, the JWST will be able to see through much of the dust that obscures visible light. It will also study dark matter, which is thought to form the majority of the matter in the universe.