First colour detected for planet outside our system

Astronomers using NASA’s Hubble Space Telescope say they have figured out the colour of a planet outside our solar system for the first time. It’s cobalt blue, though not at all Earth-like, they said, describing a world where surface temperatures are hot enough to melt stone and where it may rain glass — sideways. The planet is HD 189733b, one of the closest worlds out­side our solar system visible crossing the face of its star, 63 light-years away.