The subject of the header photograph; you; me; the remarkable people who built and sent the camera; all our homes, history, hopes, fears, aspirations:–
Fig. 1 (do view full-screen) includes the evening horizon, giving depth from perspective. Breathtaking. Wish Carl Sagan could have seen this.
“The distance between Earth and Mars when Curiosity took the photo was about 99 million miles (160 million kilometres)”.