glowing orange strings

Wrinkles left by the Big Bang may have magnetized the universe

As cosmic strings – exotic ripples in spacetime left behind by the first moments of the Big Bang – travel, they may trigger the formation of magnetic fields in their wake, new research suggests. These magnetic fields would then soak the universe, thus explaining the magnetization of galaxies and clusters, scientists propose in a new article.

Almost every substantial object in the universe harbors a magnetic field. Smaller objects, like planets and stars, generate their own magnetic fields from dynamo actions inside them, where swirling streams of electrically charged plasma force weak magnetic fields to fold in on them themselves.

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