Bubble

The bubble film consists of a thin layer of water enclosed between two layers of molecules, often soap. These layers contain molecules, one of which is hydrophilic and the other hydrophobic. The hydrophilic part is attracted a thin layer of water, while the hydrophobic, on the contrary, is pushed. As a result, the layers that protect the water from rapid evaporation and reduce surface tension. Usually in the form of a sphere with iridescent surface (sometimes in the wind maybe a fraction of a second to take unusual forms, unusual shapes can be obtained by gluing several spheres). The dimensions of the bubble depend on the devices through which they are inflated, and the material properties of the soap liquid. Bubbles are usually from several seconds to several minutes and burst when squeezed or spontaneously. If you inflate the bubble, at a temperature of -15 °C, it will freeze upon contact with the surface. The air inside the bubble will gradually seep out, and eventually the bubble will collapse under its own weight. At a temperature of -25 °C the bubbles freeze in the air and may shatter when hitting the ground. If this temperature to inflate the bubble with warm air, it will freeze almost perfect spherical form, but inasmuch as the air will cool and shrink in volume, the bubble can partially collapse, and its shape will be distorted.
In the photograph, accidental shooting can be taken for UFOs. Due to the reflection of sunlight on the surface can be called a witness to the "metal sphere", which suddenly disappeared. Description varies depending on the time of day, the presence of the sun and time of observation.

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