The James Webb Space Telescope is a groundbreaking observatory, three stories tall, tennis court-sized, with a 21-foot mirror and four powerful instruments. It's 100 times more potent than the Hubble, yet half the weight, designed to see the universe's first galaxies post-Big Bang. Building it involves precise material choices for launch and space conditions. To learn more about the elements used in the James Webb Space Telescope, please explore the complete Elements of Webb pathway.