Thermograph of a man. Colour coding runs from white (hot) through red, green and purple to blue and black (cold).

---

Size: 3294px × 5421px
Photo credit: © DR R CLARK & M GOFF/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -, 2018, alqueva, astronomical, astronomy, astrophotography, celestial, circles, circular, concentric, countryside, dark, europe, european, exposure, long, long-exposure, night, north, northern, noudar, optical, park, pole, portugal, portuguese, reserve, silhouette, silhouetted, sky, star, time, time-exposure, trail, trails, tree, visible