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[Far and Wide Part 2: Surveying the Universe]
The Nancy Grace Roman and James Webb Space Telescopes have very different approaches to studying the universe.
Webb will see galaxies that are extremely far away, whose light was emitted when the universe was very young. It will reveal an early universe that scientists have only explored through calculations. We have very little information about the cosmos’ infancy, and Webb will help us fill in many of the gaps in our understanding by making direct observations of galaxies as far into the past as physically possible.
Roman, on the other hand, will use the power of its wide sky coverage to survey massive regions of space, documenting significant portions of the universe through its adolescent and early adult years. Roman will be able to survey thousands of square degrees of sky during its primary mission, enabling studies that were never possible before. Only by studying hundreds of millions of galaxies can scientists begin to determine the behavior of the universe as a whole — its large-scale structure, and how it has changed over time.
[Learn more at science.nasa.gov/roman-and-webb]
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