James Webb Space Telescope Update: All mirrors on board

The James Webb Space Telescope (sometimes called JWST or Webb) will be a large infrared telescope with a 6.5-meter primary mirror. The telescope will be launched on an Ariane 5 rocket from French Guiana in October of 2018. Join JWST scientists and engineers in a Hangout to find out the latest status, challenges of engineering and the exciting science to be done with this amazing telescope.