Educational Use Permitted Only - Attribution, NoDerivitives, NonCommerical For additional information on the use of these images contact: info@arck-project.org
Description
This gnomon is like those used on the lunar surface by Apollo astronauts during their scientific and photographic tasks. A gnomon is a gimbaled stadia rod mounted on a tripod so that the rod was free to point vertically. When deployed on the lunar surface, the shadow cast by the staff indicated sun angle and, therefore, direction. The rod length and the painted scale provided a reference for estimating the sizes of nearby objects. Shades of gray on the rod ranged in reflectivity from 5% to 35% and a color scale enabled more accurate determination of rock and soil colors by comparison.
If you're wondering about permissions and what you can do with this item, a good starting point is the "rights information" on this page. See our terms of use for more tips.
Share your story
Has Calisphere helped you advance your research, complete a project, or find something meaningful? We'd love to hear about it; please send us a message.
