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The Nancy Grace Roman Space
Telescope is a survey mission.

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For one of these, called the Galactic Bulge
Survey,

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Roman will aim its expansive view
at the center of our galaxy

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and observe a two-square-degree region
in infrared wavelengths

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that cut through the obscuring dust
to reveal millions of stars.

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During this survey, Roman will take a new image

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every 2 minutes for a total of 400 days of coverage.

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Roman will be watching for planets
transiting their host stars,

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and rare gravitational lensing events
where gravity of foreground objects

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lenses the light of background stars.

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Astronomers anticipate
that Roman could discover over 1,000

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microlensing and 100,000
transiting planets from this survey alone.

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Observatories like the James Webb Space Telescope

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can then follow up with a narrower,
more targeted view

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and learn key details
about the most interesting discoveries.