A classical sundial at Parkes radio astronomy observatory, New South Wales, Australia. The sun's shadow cast by the gnomon indicates a time of about , but the dial includes corrections for each month, showing the number of minutes to add or subtract. The sundial is dedicated to the memory of John Gatenby Bolton, the observatory's director between 1961 and 1971.

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Size: 5128px × 3408px
Location:
Photo credit: © MARK WILLIAMSON/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: astronomy, australia, bolton, classical, clock, correction, dedicated, dial, gnomon, historic, indicator, john, minute, month, observatory, parkes, radio, shadow, south, sun, sundial, time, timepiece, wales