This is the Orion Bar, a ridge-like gas and dust feature in the Orion Nebula. Photochemistry is active in this region, where the light from young stars dominates. Astronomers are studying this region to understand the details of stellar feedback. Image Credit: ESA/Webb, NASA, CSA, M. Zamani (ESA/Webb), the PDRs4All ERS Team

Young stars form in molecular clouds, and once they're turned on, they begin to shape their natal clouds with radiation. Researchers developed a new 3D model of one feature of the Orion Nebula star-forming region called the Orion Bar. Their model matches JWST observations, and explains how the uneven structure in stellar nurseries creates shadowed regions that alters the astrochemistry in the clouds.

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