The Moon over Seattle Does the Moon look greater, when it is located near the horizon? No, it doesnt – as it is shown lower in the picture, the visible size of the Moon doesnt depend on its position in the sly. Strangely enough, the cause or the causes of this well-known Moon illusion are still under discussion. Two main explanations are based on the fact that the objects in the foreground make an impression as if the Moon near the horizon is at the greater distance. Historically more popular explanation states that we perceive more distant objects as bigger in size, and at the same time, the modern version also assumes that the distortion of notion of distance causes differences in eye focusing. Anyway, the angular diameter of the Moon always totals some 0.5 degrees. At his sequence of images, obtained at the end of the last year, the Moon was photographed with short-term exposure each 2.5 minutes, and the last exposure was made rather continuous in order to obtain wonderful panorama of Seattle. [Astronet.ru] 
|