63 light-years: the distance from Earth to the blue exoplanet HD 189773b, which looks like a cozy place to live—except its surface temperature is 1,000 degrees Celsius and it rains glass. Sideways..
HD 189773b looks like Earth because it’s blue. Astronomers have determined its true color, a first for an exoplanet, or a planet orbiting a star other than Earth’s own sun.
The blue color is thought to come from silicate particles in the planet’s atmosphere, which scatter blue light. Because of the planet’s surface temperature, the particles could condense to form glass. These glass grains would then fly around in the planet’s 4,000 mph (7,000 kilometers per hour) wind. Ouch.