The cleanroom at NASA's Goddard Space Flight Center in Greenbelt, Md. has received a giant structural steel frame that will be used to assemble the mirrors and instruments of the James Webb Space Telescope.

"This milestone is important as it marks the transition to the integration and testing phase for the Webb telescope's element," said Lee Feinberg, Optical Telescope Element Manager for the Webb telescope at Goddard.

The Webb telescope is the world's next-generation and scientific successor to the . The most powerful space telescope ever built, Webb will observe the most distant objects in the universe, provide images of the very first galaxies ever formed and study planets around .

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