World's Most Powerful Space Telescope Fully Deployed In Space: NASA

"The final wing is now deployed," NASA said on Twitter, adding the team was now working "to latch the wing into place, a multi-hour process".

The James Webb Space Telescope completed its two-week-long deployment phase on Saturday, unfolding the final mirror panel as it readies to study every phase of cosmic history. Two weeks after launch, @NASAWebb has hit its next biggest milestone: the mirrors have completed deployment and the next-generation telescope has taken its final form.Next up for Webb? Five months of alignment and calibration before we start getting images: pic.twitter.com/BOj5O1HS37

"The final wing is now deployed," NASA said on Twitter, adding the team was working "to latch the wing into place, a multi-hour process."

Because the telescope was too large to fit into a rocket's nose cone in its operational configuration, it was transported folded-up. Unfurling has been a complex and challenging task -- the most daunting such project has ever attempted, according to NASA.

The most powerful space telescope ever built and the successor to Hubble, Webb blasted off in an Ariane 5 rocket from French Guiana on December 25, and is heading to its orbital point, a million miles (1.5 million kilometers) from Earth.