A deeper look into small, young, star-forming galaxies during reionization (IMAGE)

NASA/Goddard Space Flight Center

A deeper look into small, young, star-forming galaxies during reionization

Caption

At left is an enlarged infrared view of galaxy cluster Abell 2744 with three young, star-forming galaxies highlighted by green diamonds. The center column shows close-ups of each galaxy, along with their designations, the amount of magnification provided by the cluster’s gravitational lens, their redshifts (shown as z — all correspond to a cosmic age of about 790 million years), and their estimated mass of stars. At right, measurements from NASA’s James Webb Space Telescope’s NIRSpec instrument confirm that the galaxies produce strong emission in the light of doubly ionized oxygen (green bars), indicating vigorous star formation is taking place.

Credit

NASA/ESA/CSA/Bezanson et al. 2024 and Wold et al. 2025

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License

Public Domain

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