The James Webb Space Telescope had completed the final step of its unfurling when the observatory opened its huge, gold-plated, flower-shaped mirror over the weekend of Jan. 8.

According to the Associated Press, the last part of the 21-foot (6.5-meter) mirror swung into place at flight controllers’ command, completing the unfolding of the space telescope launched by the U.S. National Aeronautics and Space Administration (NASA) on Christmas Day, Dec. 25.

“What an amazing milestone. We see that beautiful pattern out there in the sky now,” NASA’s science missions chief Thomas Zurbuchen said, congratulating the team.

“We have a deployed telescope on orbit, a magnificent telescope the likes of which the world has never seen,” Zurbuchen said. “So how does it feel to make history, everybody? You just did it.”

The mirror, which scientists call “golden eye,” is the largest and most sensitive ever launched. NASA equipped the $10 billion Webb with the mirror to help scan the cosmos for light streaming from the first stars and galaxies formed 13.7 billion years ago.

The telescope’s primary mirror is beryllium, a lightweight yet sturdy and cold-resistant metal. It has 18 segments, each of which is coated with an ultra-thin layer of gold, highly reflective of infrared light. The segments will be adjusted to focus as one on stars, galaxies, and alien worlds.

Webb was launched on an Ariane 5 rocket from a launchpad in South America. The space telescope is flying more than 667,000 miles (1 million kilometers) from Earth and should reach its destination of 1 million miles (1.6 million kilometers) away in another two weeks.

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