Travel through time in this visualization of the Hubble Space Telescope’s Ultra Deep Field. Farther away in space and time, galaxies are smaller and redder. The James Webb Space Telescope is building on Hubble’s deep fields to see light that is even older and redder—from some of the first galaxies ever to form. Together, the two telescopes are revealing more of the universe’s history. Credit: NASA, ESA, STScI. | Space Telescope Science Institute