Astronomical Regulator which times photographic exposures. Lowell Observatory: Flagstaff, AZ

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Size: 2810px × 6000px
Photo credit: © Lonnie Paulson / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: arizona, astronomical, astronomy, astrophotography, flagstaff, lowell, observatory, regulator, science, timeer