However astronomical observations suggest that ordinary observable matter makes up only about 15% of the matter in the universe: the remainder is dark matter; the composition of this is unknown, but it is not composed of chemical elements.
Namun, observasi astronomi menyarankan bahwa materi biasa yang teramati hanya menyusun 15% dari materi di alam semesta: sisanya adalah materi gelap; komposisinya tidak diketahui, tetapi tidak tersusun dari unsur kimia.