Mirror Installation Complete for NASA's Next Space Telescope

On Wednesday (Feb. 3), technicians installed the 18th and final primary mirror segment on NASA's James Webb Space Telescope (JWST), an $8.8 billion observatory that's scheduled to launch in 2018 to investigate some of the biggest questions in astronomy. "Scientists and engineers have been working tirelessly to install these incredible, nearly perfect mirrors that will focus light from previously hidden realms of planetary atmospheres, star forming regions and the very beginnings of the universe,