WASHINGTON, United States (AFP) — The world’s largest and most powerful space telescope unfolded its giant golden mirror for the last time on Earth on Tuesday, a key milestone before the $10 billion observatory is launched later this year. The James Webb Space Telescope’s 21 feet 4 inch (6.5 meter) mirror was commanded to fully expand and lock itself into place, NASA said — a final test to ensure it will survive its million-mile (1.6 […]