ALMA detects carbon 'smog' permeating interstellar atmospheres of early galaxies

Astronomers study the elements scattered between the stars to learn about the internal workings of galaxies, their motion and chemistry. To date, however, attempts to detect the telltale radio signature of carbon in the very early Universe have been thwarted, perhaps—as some have speculated—by the need to allow a few billion years more for stars to manufacture sufficient quantities to be observed across such vast cosmic distances.

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