* The author is part of the community of readers of La Vanguardia

The moon is beautiful with its well-defined craters, with the plane at its right, in an image captured from the beach of Gavà, in the Baix Llobregat, for Las Fotos de los Lectores de La Vanguardia.

The moon portrayed is exactly 41.93% visible and is waning. In fact, there are 7 days left until the New Moon phase. The optical effect of the photograph, given the shape of the moon, seems as if it were telling us that the plane has crossed it in half and split it, as if it had lost its other half.

The waning moon is one of the four lunar phases, specifically, the one in which only half of the lunar disk is visible from Earth.

The last quarter occurs when the rays that join the Earth with the moon and the sun form a 90 degree angle. Thus, from Earth it is only possible to observe half of the lunar disk (a quarter of the Moon), since the sun illuminates only that half.

As the image has been captured in the northern hemisphere, we can see the left side of the Moon, while those in the southern hemisphere can see the right side.