The James Webb Space Telescope was fueled inside the payload preparation facility at Europe’s Spaceport in French Guiana on Nov. 26, 2021. Credit: © ESA-CNES-Arianespace/Optique video du CSG – P Piron; used with permission

In preparation for launch later this month, ground teams have successfully completed the delicate operation of loading the James Webb Space Telescope with the propellant it will use to steer itself while in space….

More: https://blogs.nasa.gov/webb/2021/12/06/nasas-james-webb-space-telescope-fully-fueled-for-launch/