In meteorology, a cloud is an aerosol consisting of a visible mass of minute liquid droplets, frozen crystals or other particles suspended in the atmosphere of a planetary body or similar space. Water or various other chemicals may compose the droplets and crystals. It looks beautiful when we see from earth, seems very high & large. We feel that clouds are touching sky and they both seem to be very close to each other. Sometimes we know whether the sky and clouds are same or it differ from each