Tracing the Hidden Hand of Magnetism in the Galaxy

Amid the roilings of the Milky Way, immense pockets of gas coalesce into clouds where stars are born. In this process, there is a hidden hand at play: magnetism. “There’s this fantastic quote: You can measure a man’s ignorance by the strength of his magnetic field,” said Susan Clark, an astrophysicist at Stanford University. “In other words, when we have a piece of a problem historically in…

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