Astronomical observations show that polycyclic aromatic hydrocarbons (PAHs) are abundant and widespread in the interstellar medium. PAH molecules consist of several adjacent aromatic rings terminated by hydrogens. In new research, scientists performed laboratory isotopic analysis of PAHs in samples of the asteroid Ryugu that were collected by JAXA’s Hayabusa-2 spacecraft as well as in samples of the meteorite Murchison. They argue that at least...
