WEBVTT

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

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

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will reveal thousands of distant galaxies.

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

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

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its star formation history, and more.

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

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

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Even better, its remarkably large field of view

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

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

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in the universe’s history of stars.