UFO. Netherlands

On the background of cloudless sky glowing object seems to be randomly moving.

Translated by «Yandex.Translator»

Unmanned aerial vehicle (UAVs, also sometimes shortened as BLAH; colloquially sometimes referred to as "drone" or "drone" (from the English. drone — drone)) — aircraft without crew on Board. Created for aerial shooting, monitoring ground objects and other tasks in real time.

Distinguish UAVs for military and civil purposes.

Also they are divided into:

Balloon — aircraft (balloon), which is used for the flight gas, which is lighter than air.

Balloons - different sizes and shapes size toy, often made of latex. Is inflated with air or other gas. If the gas is lighter than air, the ball gains the ability to fly. The photo looks like a small dot. The colors and the opacity depends on the texture and color of the ball.

An aircraft heavier than air for flights in the atmosphere (and outer space (e.g. An orbital aircraft)), using the aerodynamic lift of a glider to keep itself in the air (when flying within the atmosphere) and the thrust of a power (propulsion) installation for maneuvering and compensating for the loss of total mechanical energy to drag. 

A rotorcraft in which the lift and thrust required for flight are created by one or more main rotors powered by an engine or several engines. They differ in maneuverability, the ability to hover and almost vertical takeoff.

Ordinary satellites, which often look like single, not very bright luminous dots moving smoothly in the night sky, are quite often mistaken for UFOs. After the Starlink satellites (near-Earth satellite systems developed by SpaceX, in order to create a cheap and high-performance satellite Internet communication channel and technical transmitters for receiving and transmitting signals from earth and orbit) were launched, it became possible to observe groups of satellites (up to 60 pieces) flying one after another.