'Nightmare world': Jupiter-sized planet, which is 64 light-years from Earth, reeks of rotten eggs

HD 189733 b, a hot Jupiter 64 light-years away, has an atmosphere with hydrogen sulfide, giving it a rotten egg smell. The planet, orbiting its star in 2.2 days, has extreme conditions: 1,700°F temperatures, glass rain, and 5,400 mph winds. This discovery aids understanding of sulfur's role in gas giant formation.