Unique Photos of Cloud

About cloud, following collection of photos of
cloud that looks unique from various places. The cloud is visible mass of water droplets or frozen crystals hanging in the atmosphere
above the surface of the Earth or other
planetary body.

Clouds are also visible mass attracted by gravity, like a mass of matter in space called interstellar clouds and nebulae.

Clouds studied in the science of clouds or cloud physics branch of meteorology. On Earth the substance is usually water vapor condensation.
With the help of hygroscopic particles such as
dust and salt air of the sea, the small water
droplets formed at low altitude and ice crystals at high altitude when the air is cooled to saturation by a local or larger convective lifting of non-convective scale.