Researchers have found evidence of the presence of chromium hydride on the exoplanet WASP-31b, which at a certain temperature and pressure is at the boundary between liquid and gas. On Earth, it resembles clouds and rain. Chromium hydride can play a role in the formation of the weather system on this planet: clouds and rain may appear there. This is the first time chromium hydride has been detected on hot Jupiter.
The authors of the work believe that chromium hydride is in gaseous form during the day on the planet, and in liquid form at night.