American astronomers using the James Webb Space Telescope have made groundbreaking discoveries about the atmosphere of HD 189733 b, a Jupiter-sized gas giant located 64 light-years from Earth. The researchers, led by Dr. Guangwei Fu from Johns Hopkins University in Baltimore, detected trace amounts of hydrogen sulfide in the planet's atmosphere, providing new insights into the composition of gas giants beyond our solar system. The presence of hydrogen sulfide not only gives off a distinct odor but also offers scientists clues about the influence of sulfur on the formation of planets. By measuring sulfur levels and identifying the planet's oxygen and carbon sources, the study highlights the vital role of sulfur in building complex molecules and shaping planetary atmospheres. Dr. Fu's team plans to further investigate sulfur in exoplanets to understand how its concentrations affect their formation near parent stars. This research could provide valuable information on the atmospheric composition of exoplanets and enhance our knowledge of planetary formation processes. The study also ruled out the presence of methane in HD 189733 b and measured levels of heavy metals, expanding our understanding of how different planets form and vary in composition.