"Unveiling the Fiery Atmosphere of HD 189733b: A Planet Hotter than the Sun"

Scientists have modeled the atmosphere of the hot Jupiter exoplanet HD 189733b and discovered that the unstable absorptions in the hydrogen line Lyα are likely caused by the high activity of the host star, resulting in increased radiation flux in the ultraviolet region and a faster loss of stellar material. The researchers used transit spectroscopy to study the movement and composition of the planet's atmosphere, revealing the presence of different elements. This study provides insights into the physico-chemical properties of the HD 189733b planetary system.