See a new map of the universe’s magnetic fields – the largest and most detailed ever made

By Alec Thomson, SKA-Low Commissioning Scientist, Square Kilometre Array Observatory; and Affiliate, Space and Astronomy, CSIRO

Magnetic fields are a fundamental part of the universe. They govern how small particles – the building blocks of planets, stars, and ultimately galaxies – move through space.

We still don’t know how magnetic fields came to exist in the universe, but we do know they’re everywhere. Earth itself has a magnetic field that compasses and migrating birds respond to.

With radio telescopes, astronomers can use the light from distant galaxies…

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