A definition of ordinary matter is right there in the sentence that refers to ordinary matter emphasis added According to the Planck mission team and based on the standard model of cosmology on a mass energy equivalence basis the observable universe contains 26 8 dark matter 68 3 dark energy for a total of 95 1 and 4 9 ordinary matter I m not clear what more we need It s possible that that sentence has too many qualifiers and thus this important one gets lost for example the According to the Planck mission team bit could go that s a detail that can be left to the reference and the body of the article I ll tweak the sentence to be more clear Alex