Researchers believe that the planet is dark blue due to glass rain. Researchers at the US space agency NASA say they have discovered for the first time the true color of an alien planet. The researchers said that using the Hubble Telescope, they have found this planet as dark blue as Earth. Researchers say that the extreme temperature and climate of this planet , HD 169633B, is so harsh that it rains glass here , and the reflection of light on this glass makes it look dark blue. At 63 light-years from Earth, the planet is basically a gas giant , orbiting very close to its star. On this planet, cyclones are moving at a speed of seven thousand kilometers per hour and it is raining. The findings will be published in the Astrophysical Journal Letters. Earlier, researchers said , " What we call dry stars, Venus, has metallic rain or metallic snowfall." Lead and bismuth fall there like snow. ' Researchers believe that the ice on Venus is made up of lead sulfide and bismuth sulfide. Using data from the 1979 NASA spacecraft's Magellan mission to Venus, researchers have speculated that Venus may have metallic snow. Is metallic snowfall or glass-rain possible ? Bruce Fagley, a researcher at the University of Washington in the United States, told the Huffington Post that the surface of the planet and the atmosphere are much warmer than on Earth. The metallic compounds emitted from the volcanoes there condense in the cooler regions of the atmosphere and fall like snow on the earth's surface. Much of the information outside the solar system is still unknown to us. However, researchers say that this strange process takes place in our solar system, even on the nearest Mars. However , instead of glass or metallic rain on Mars, carbon dioxide snowfall occurs.