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Technology at the Extremes

The Webb telescope is an engineering marvel, the largest telescope ever put into space, orbiting beyond Earth's moon at temperatures near absolute zero—the point at which all motion ceases. Webb is carefully engineered to handle the rigors of space and, in many cases, turn them to its advantage. Explore the creativity and innovation that paved the way to Webb.


The Incredible Expanding Telescope

How do you get a giant telescope into orbit? You fold it.

Doors to the Universe

An innovative microshutter array will allow Webb to observe 100 objects at once.

Webb's Big Chill

Webb must be kept spectacularly cold in order to best capture infrared light.

Webb's Science Tools

Webb’s four science instruments will explore the infrared universe in different ways.

Quick Facts About Webb

Webb's mirror is a segmented parabolic reflector