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This illustration depicts Faraday rotation in the afterglow of a gamma-ray burst. A powerful jet (upper left) sends polarized radio waves outward through the thin wall of a surrounding bubble of magnetized gas called an HII region. As the light passes through this material, its polarization angle is twisted by the magnetic field. Because the effect is stronger at longer wavelengths, the red and blue waves, which represent different radio wavelengths, exit the bubble oscillating in different directions. By measuring this difference, astronomers were able to map the magnetic environment surrounding GRB 260310A for the first time. Image credit: NSF / AUI / NRAO / M. Weiss

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Astronomers Detect Gamma-Ray Burst’s Magnetic Fingerprint

July 15, 2026

Using NSF’s Very Large Array (VLA), astronomers made the first radio detection of polarized light and Faraday rotation…

Extended Orion nebula shell sampled by HI emission from the combined VLA and FAST observations (shown in red), Hα emission from the European Southern Observatory Digitized Sky Survey (shown in green), and 3.4-μm emission registered by the Wide-field Infrared Survey Explorer (WISE) satellite (shown in blue). Image credit: Juan D. Soler, University of Vienna / NRAO / VLA / NASA / WISE.

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Astronomers Uncover Hidden Structures Surrounding Orion Nebula

July 11, 2026

Using the Karl G. Jansky Very Large Array (VLA) s and the Five-hundred-meter Aperture Spherical Radio Telescope (FAST),…