One small step for James Webb, one giant leap for telescopes, or something like that. NASA has just proudly announced that the first of 18 mirrors has just been installed the soon to be completed James Webb Space Telescope. Just one mirror, you say. So what's the big deal, you ask? Considering that just this one mirror can fit around seven mirrors from the Hubble Space Telescope and considering James Webb is set to replace dear old Hubble by 2018, that's quite the milestone achievement indeed.