“…there is a time in the universe’s past where the galaxies were the first to light up… The stars & galaxies send out ionizing radiation, which clears out the fog of the hydrogen in the universe. Once it’s cleared out, the stars and galaxies can shine through.” - Dr. Amber Straughn. More about the First Light after the Big Bang in this video.
Webb is set to look at the first light after the Big Bang.
Credit: NASA Goddard
Sophia Roberts (AIMM)
Michael McClare (KBRwyle)
James Webb Space Telescope
NASA Science Live - An Update on the James Webb Space Telescope from the Cleanroom