Vikrant Agarwal/EyeEm

Magnetic Field 5 Billion Light-Years Away Offers Insight Into Our Universe

The most distant galactic magnetic field that has ever been observed provides intriguing clues about the evolution of magnetism in the unfolding universe.

Left: Hubble Space Telescope image of the gravitational lensing system CLASS B1152+199. The background quasar is lensed by the foreground galaxy into two images A and B. Right: Faraday rotation of the lensed images. Image A probes a sight line through the less dense outskirts of the lensing galaxy with a weaker magnetic field, while Image B probes through a sight line closer to the center of the galaxy with higher gas density and stronger magnetic field. Sui Ann Mao, with HST image obtained from the Hubble Legacy Archive