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Official site of the design, build, test and launch of JWST.


JWST Science overview, future home of science data and images.


Overview of the spacecraft, mission and science of JWST.

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Webb Science

The James Webb Space Telescope will be a giant leap forward in our quest to understand the Universe and our origins.  The Webb will examine every phase of cosmic history: from the first luminous glows after the Big Bang to the formation of galaxies, stars, and planets to the evolution of our own solar system.  The science goals for the Webb can be grouped into four themes:

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The End of the Dark Ages: First Light and Reionization seeks to identify the first bright objects that formed in the early Universe, and follow the ionization history.

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Assembly of Galaxies will determine how galaxies and dark matter, including gas, stars, metals, physical structures (like spiral arms) and active nuclei evolved to the present day.

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The Birth of Stars and Protoplanetary Systems focuses on the birth and early development of stars and the formation of planets.

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Planetary Systems and the Origins of Life studies the physical and chemical properties of solar systems (including our own) and where the building blocks of life may be present.

The observations needed to accomplish these goals require a telescope that can study the Universe in infrared light.  For this, it needs to be cooled till it is just a few tens of degrees above Absolute Zero.  To accomplish this goal, the Webb will reside far from the Earth at the L2 region.  Why does Webb need to be at L2?

We now have a series of videos that highlight the science that will be performed by the James Webb Space Telescope.

For more technical information about Webb's scientific capabilities, please visit our "For Scientists" section.