3427 x 5200 px | 29 x 44 cm | 11,4 x 17,3 inches | 300dpi
Data acquisizione:
11 giugno 2009
Ubicazione:
Aberystwyth
Altre informazioni:
Twilight in Aberystwyth, the illumination of the Earth's lower atmosphere when the Sun itself is not directly visible because it is below the horizon. Twilight is produced by sunlight scattering in the upper atmosphere, illuminating the lower atmosphere so that the surface of the Earth is neither completely lit nor completely dark. Primarily the absence of shadows and the appearance of objects silhouetted against the bright sky, also called 'sweet light', and painters, who refer to it as the blue hour, after the French expression l'heure bleue.
