Before the sun fully formed, tiny bits of rock were already recording the magnetic forces present in the very early solar system. More than 4.5 billion years later, scientists have learned how to read that record.
The ancient rocks suggest that the turbulent cloud of gas and dust that gave rise to our solar system was shot through a powerful magnetic field. That field may have helped feed the growing sun, researchers report August 24 in the Proceedings of the National Academy of Sciences . The findings suggest gravity may not have acted alone to build our solar system or the countless other planetary systems in the Milky Way and beyond.
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