In 2005, HD 189733b became famous for its extreme features. This big, blue-gas planet, larger than Jupiter, has very hot temperatures and strong winds that blow molten glass through its atmosphere. Recently, astronomers used data from the James Webb Space Telescope to learn more about this interesting planet. HD 189733b is one of the most studied exoplanets and was the first to show signs of hydrogen sulfide, a gas that smells like rotten eggs. Guangwei Fu from Johns Hopkins University discovered hydrogen sulfide on HD 189733b, a “hot Jupiter” orbiting very close to its star, much closer than Jupiter to the Sun. It completes an orbit every two days with surface temperatures up to 1,700°F (930°C). This rare type of planet exists in less than one percent of star systems, 64 light-years away in the Vulpecula constellation. Luis Welbanks of Arizona State University noted its similarities to Jupiter and unique thermal characteristics. The James Webb Space Telescope, which has been studying it since 2022, found hydrogen sulfide, water, and carbon dioxide, with methane notably absent, offering insights into planetary formation and the solar system.