[MUSIC PLAYING] Looking back in time, ever farther. In the 1920s, Edwin Hubble observed the expansion of the universe by observing the motions of far off galaxies. The Hubble Space Telescope has pushed this boundary of our understanding further back, observing even more remote galaxies and seeing further back in time. 

But the Webb Telescope can push still further to the earliest stages of a galaxy's life. Like a kid growing up, the early days of a galaxy is where the most development occurs. Lots of stars and gas are just beginning to transform into the full fledged figure of a mature galaxy. 

With Hubble, we can see the universe's awkward teen years as galaxies grew up, but Webb will be able to take the childhood photos that would show us so much more about how the universe began. The Hubble Space Telescope is currently pushing the limits of detection as far back in time as it can, but the Webb Telescope is designed specifically to find the special time in the early history of the universe. Equipped with the latest technology, Webb will allow us to see the objects that brought light to the cosmos and unravel the mysteries of reionization. Only then will we have a better idea of how the universe grew into what we see around us today. 

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