If you fly through the clouds of Uranus, you will smell such a pretty bad smell, said Fletcher, a planetary scientist at University of Leicester in England, on April 23rd, according to the US science news biweekly website. 23 days in the journal Nature astronomy, Fletcher and his colleagues reported in the journal Nature astronomy that they detected a chemical map of hydrogen sulfide in the upper clouds of Uranus in the northern Hawaii binoculars spectrometer. The report says this is not entirely surprising: the observations of last 90s show that hydrogen sulfide exists in the deeper part of Uranuss atmosphere. However, this gas has not been clearly detected before. The clouds of Uranus are not only smelly, but also help to identify the details of the early solar system. Uranuss hydrogen sulfide cloud distinguishes itself from large gas planets, such as Jupiter and Saturn, whose surface is mainly ammonia. Hydrogen sulfide is lower than the freezing point of ammonia. Therefore, there may be a large number of ice crystals in the early solar system far away from the center of the center, where the ice crystals are gathered here on the newly formed planets. This implies that, compared with Jupiter and Saturn, the giant ice planet, Uranus and Neptune, form farther from the sun. It is reported that these smelly clouds are far from Fletchers disgust. He and other planetary scientists hope to send a spaceship to these giant ice bodies to find more information.