This view of the twilight sky and Martian horizon taken by NASA's Curiosity Mars rover includes Earth as the brightest point of light in the night sky. Earth is a little left of centre in the image indicated by the arrow, and the moon is just below Earth. The left eye camera of Curiosity's Mast Camera (Mastcam) captured this scene approximately 80 min after sunset on the 529th Martian day, or sol, of the rover's work on Mars (31 January 2014). The image has been processed to remove effects of cosmic rays. The distance from Mars to Earth in this photo was 160×106 km (99 million miles). Image credit: NASA/JPL-Caltech/MSSS/TAMU.