This astounding image made by Ludovic Celle shows Phobos, the largest moon of Mars (the other one being Deimos), imposed over the French city of Grenoble in the Alpes. Image credit: Ludovic Celle / davinci-marsdesign
Saturn’s largest moon, Titan, is seen in the centre of this image. Titan is 5,150 kilometres, or 3,200 miles, across. The smaller moon Enceladus (504 kilometres or 313 miles across) is on the far right, appearing just below the rings.