Star trails over a historic tower in the Alborz mountains of Iran. Towers like this may have been used by ancient astronomers to maintain accurate cal

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Star trails over a historic tower in the Alborz mountains of Iran. Towers like this may have been used by ancient astronomers to maintain accurate calendars.

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Size: 4361px × 2907px
Photo credit: © BABAK TAFRESHI/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: alborz, ancient, astronomical, astronomy, circular, concentric, east, eastern, exposure, historical, iran, iranian, middle, middle-east, middle-eastern, mountain, night, range, sky, space, star, stars, time, time-exposure, tower, track, tracks, trail, trails