Millions of Stars May Be Made of Nothing But Metal

TIME

An astronomer at the California Institute of Technology has discovered that some stars — maybe as many as 1 in 10,000 — are made entirely of metal.

It’s the latest finding in a series of eureka moments fueled by recent studies of turbulence, a term that scientifically refers to “certain complex and unpredictable motions.” To keep an immensely complicated subtopic of fluid mechanics simple: in turbulent environments, we can witness something called “preferential concentration,” or the tendency of denser particles to gather together in concentrated regions.

Scientists recently discovered that preferential concentration can explain how raindrops are formed — by denser water vapor particles coalescing. It’s similar with stars, except in their case it’s elements coalescing in turbulent gas clouds rather than water.

If the densest particles in gas clouds are metallic elements, and preferential concentration impels dense particles to gather together, then it logically follows, researchers say, that…

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