Scientists Discover 'Alien' Planet Raining Molten Glass

The planet's vivid blue hue, observed by NASA's Hubble Space Telescope, is attributed to silicate particles in its atmosphere that scatter blue light. These same silicate materials are believed to form molten droplets, leading to rain made of glass. This glass rain is swept sideways by winds that can reach speeds of approximately 7,000 kilometers per hour.

HD 189733b orbits its star extremely closely, resulting in daytime temperatures that can exceed 930 degrees Celsius, hot enough to melt many terrestrial materials. Astronomers discovered the planet in 2005, and its extreme weather and atmosphere make it a key target for understanding the formation and evolution of exoplanets.