http://www.newsweek.com/when-james-webb-space-telescope-launch-what-time-how-big-nasa-1662107

The James Webb telescope is the largest and most powerful space observatory ever built, promising to revolutionize our understanding of the universe. But when is the observatory launching and how big is it?

The James Webb Space Telescope (JWST) is designed to observe the cosmos primarily in infrared light, unlike the Hubble Space Telescope which focuses on shorter visible and ultraviolet light wavelengths.