When astronomers study far away galaxies and galaxy clusters, they find that very little of the matter in the universe is normal matter, like stars, planets, and people. Closer to home, in neighboring galaxies and in the Milky Way, they see even less normal matter. Are they just not seeing it, or is it really not there? Michigan Astronomy researcher Jiangtao Li and Prof. Joel Bregman are among those searching for this missing matter. Read more about how they’re using the XMM-Newton space telescope, and what they did, and didn’t find at https://www.esa.int/Our_Activities/Space_Science/Where_is_the_Universe_s_missing_matter