The James Webb Space Telescope is loaded with toxic propellants by technicians wearing protective self-contained suits. Credit: ESA/CNES/Arianespace/P. Piron
A crane at the Guiana Space Center in South America will hoist the nearly $10 billion James Webb Space Telescope more than 15 stories above the floor of a rocket assembly hangar this weekend to position the observatory on top of its Ariane 5 launcher for blastoff later this month.