by Lucie AUBOURG The most powerful space telescope ever built completed a tricky two-week-long deployment phase Saturday, unfolding its final golden mirror panel, as it readies to study every phase of cosmic history. Engineering teams in the James Webb Space Telescope’s control room cheered as confirmation came back that its final wing was deployed and latched into place. “I’m emotional about it — what an amazing milestone,” Thomas Zurbuchen, a senior NASA engineer, said during […]