Cobalt-blue world with molten glass rain 63 light-years away
HD 189733b, a tidally locked hot Jupiter about 63 light-years away, appears cobalt blue because its atmosphere scatters blue light from molten silicate droplets; daytime temperatures exceed 1,000°C and winds reach around 7,000 km/h, driving continuous horizontal rain of glass droplets. The planet has no oceans, and its color was inferred from secondary eclipse spectroscopy rather than direct imaging.