50.4 MB (4.4 MB compressed)
3469 x 5074 pixels
29.5 x 42.9 cm ⏐ 11.6 x 16.9 in (300dpi)
JOHN K. DAVIES / SCIENCE PHOTO LIBRARY JOHN K. DAVIES / SCIENCE PHOTO LIBRARY
Sundial in the grounds on Herstmonceux Castle, East Sussex, England. This was the home of the Royal Greenwich Observatory from 1948-1990. A sundial uses the apparent motion of the Sun across the sky to tell the time. A shadow is cast by a gnomon (white) onto a ring bearing the hours. The shadow is falling between 13 and 14 here, indicating that the time is half past one in the afternoon.
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