The history of stars is written in the light
of the countless galaxies in which they reside.

Staring long enough, at even a small patch 
of sky like Hubble’s Ultra Deep Field,

will reveal thousands of distant galaxies.

But the image of a galaxy 
tells only part of the story.

By spreading the galaxy’s light out into a spectrum,
astronomers can learn about the ages of its stars,

its star formation history, and more.

The best way to get the whole story would be to reveal
the spectra of every galaxy in an image, all at once.

NASA’s Roman Space Telescope has 
hardware designed to do just that.

Even better, its remarkably large field of view

can cover the area of a hundred Ultra Deep Fields
in a single observation.

Such a bounty of galaxy spectra will 
help astronomers discover hidden chapters

in the universe’s history of stars.