On January 31, 2014 about 80 minutes after sundown, the Mars Curiosity rover turned its camera toward the horizon and snapped this photo of Earth shining in the Martian night sky.
‘Shining’ might be rather strong word. In the image, Earth is a faint white speck, top-center-left, just above the dim glow of twilight near the Martian landscape. Can you see it? We couldn’t. Luckily, NASA supplied an image with a pointer, see below.
The image was captured on the rover’s 529th day, or sol, on the red planet. When Curiosity took this photo, Mars was about 160 million kilometers (99 million miles) from Earth.