About 63 light-years away there is a deep-blue world that looks deceptively like Earth from a distance, but on the planet HD 189733b the temperature reaches 2,000 degrees Fahrenheit and the winds scream at thousands of miles an hour - Space Daily

Point the right instrument at HD 189733b and the colour that comes back is a deep cobalt blue, the kind of blue a person who grew up with photographs of Earth from orbit would recognise in an instant. Astronomers determined the colour in 2013 using the Hubble…