>No cosmologist uses "matter" when they mean "protons" for example. Don't astronomers call elements like neon metals? Maybe cosmologists don't? https://en.wi

>No cosmologist uses "matter" when they mean "protons" for example. Don't astronomers call elements like neon metals? Maybe cosmologists don't? https://en.wikipedia.org/wiki/Metallicity https://en.wikipedia.org/wiki/Metallicity