According to an astronomical study published in Nature on the 5th, NASA's Webb Space Telescope (JWST) observed complex molecules called polycyclic aromatic hydrocarbons (PAHs) in a galaxy formed less than 1.5 billion years after the Big Bang. The radiation of these molecules is not evenly distributed in galaxies, and the reason behind it remains to be clarified. This may be the most remote complex aromatic molecule known to be detected, and the results will help people understand the processes that take place in distant galaxies.