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Webb’s first deep field

SMACS 0723, Webb’s first deep field image.
SMACS 0723, Webb’s first deep field image. Image: NASA, ESA, CSA, and STScI

Webb’s first deep-field image captured a galactic cluster called SMACS 0723, which, thanks to gravitational lensing, magnifies much more distant light sources in the early universe. Webb will continue to use gravitational lensing to its advantage in observing the oldest light in the universe.

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