17-24

• Zotti, Georg

A large fraction of archaeoastronomical surveys is concerned with the evaluation of azimuth orientations of artificial, or sometimes natural, structures to find a correlation with potential astronomical targets, like sunrise/sunset, or the interplay of light and shadow at particular dates like the solstices. Given the difficulties of observing such a structure during months or even years, it seems very desirable to record or reconstruct the structure in question and bring a virtual 3D model into a computer system capable of accurately rendering the sky, the model, and light and shadow effects depending on proper astronomical simulation, also including the situation at other times. Applications for such a system can be manifold. Horizon panoramas in various desktop planetarium programs have already previously allowed assessment of single-viewpoint observations with proper horizon altitudes. But the ability to load a properly georeferenced and accurate 3D model into virtual space and identify and observe sight lines combined with a recreation of past skies, or to observe light and shadow effects that would change over weeks and months within just minutes of simulation, should allow much better understanding of the potential use of such structures, and can clearly illustrate and demonstrate these phenomena also for a wider audience. Likewise, an archaeologically sound virtual reconstruction beyond today’s often deteriorated state can be used to recreate the likely appearance of the site in past times. A few such installations can be seen in museums, but none of them are widely available. The author has initiated development of a plugin for the popular open-source desktop planetarium Stellarium to allow research on 3D virtual reconstructions which has recently been greatly refurbished and integrated into the regular distribution of Stellarium. The paper also describes other contributions made by the author towards application of Stellarium for research and communication of cultural astronomy.

• History and Archaeology

• Αρχαιολογία

Archaeoastronomy, Virtual Archaeology, Astronomical Simulation, Stellarium, Open-Source Software

Περιέχει 4 εικόνες

1. Berglund, K., Spearman, R. (2010): Using Free, Open Source Stellarium Software for IYA 2009. In: Barnes, J. et al. (eds): Science Education and Outreach: Forging a Path to the Future. ASP Conference Series, Vol. 431. http://adsabs.harvard.edu/abs/2010ASPC..431...59BBrown, D. (2015): Exploring Skyscape in Stellarium. In: Journal of Skyscape Archaeology 1.1:93-111.Chéreau, F.: VirGO (2012): A Visual Browser for the ESO Science Archive Facility. Astrophysics Source Code Library, record ascl:1204.012. http://adsabs.harvard.edu/abs/2012ascl.soft04012CFrischer, B., Fillwalk, J. (2012) The digital Hadrian’s Villa project: using virtual worlds to control suspected solar alignments. In: Guidi G, Addison AC (eds) Proceedings of the VSMM2012 (Virtual Systems in the Information Society). IEEE, Milano, pp 49–55Frischer, B., Zotti, G., Mari, Z., Capriotti Vittozzi, G. (2016): Archaeoastronomical experiments supported by virtual simulation environments: Celestial alignments in the Antinoeion at Hadrian’s Villa (Tivoli, Italy). Digital Applications in Archaeology and Cultural Heritage (DAACH), Vol. 3, pp. 55-79 (DOI:10.1016/j.daach.2016.06.001).Kwon, S. M., Hong, S. S., Weinberg, J. L. (2004): An observational model of the zodiacal light brightness distribution. New Astronomy 10:91-107. doi:10.1016/j.newast.2004.05.004Trimble n.d. https://3dwarehouse.sketchup.com/tos.html#license, section 3. (Seen Jan. 17, 2016)Melichar P., Neubauer, W. (2010): Mittelneolithische Kreisgrabenanlagen in Niederösterreich, Mitteilungen der Prähistorischen Kommission. Österreichische Akademie der Wissenschaften.Mucke, H. (2002). Himmelskunde im Freiluftplanetarium Wien. Astronomisches Büro, Wien.Preetham, A.J., Shirley, P., Smits, B (1999): A Practical Analytic Model for Daylight. In Siggraph ’99: Proceedings of the 26th Annual Conference on Computer Graphics and Interactive Techniques, pp.91-100. ACM Press/Addison-Wesley Publishing Co., New York. Doi: http://doi.acm.org/10.1145/311535.311545Ruggles, C.L.N. (2015), Handbook for Archaeoastronomy and Ethnoastronomy, Springer Reference, New York.Schaefer B. (1998): To the Visual Limits. Sky&Telescope 5/1998 57-60.Schwerin, J. v., Richards-Rissetto, H., Remondino, F., Agugiaro, G., Forte, M., Maqueda, R. (2011): The Ma-yaArch3D Project: Digital Technologies for Research in Maya Archaeology. Final Performance Report and White Paper. Project website: http://mayaarch3d.org (Accessed Jan 20, 2016)Stellarium project website: http://stellarium.org (Seen Jan.15, 2016)Vondrák, J., Capitaine, N., Wallace, P. (2011): New precession expressions, valid for long time intervals. Astronomy&Astrophysics 534, A22.Zotti, G., Neubauer, W. (2012): Virtual Reconstructions in a Desktop Planetarium for Demonstrations in Cultural Astronomy. In M. Ioannides et al. (eds.), Progress in Cultural Heritage Preservation (Proc. 4th International Conference EuroMed 2012, Limassol, Cyprus, Oct. 29-Nov. 3, 2012), volume 7616 of Lecture Notes in Computer Science, pages 170-180, Heidelberg, November 2012. Springer.Zotti, G. (2014): Towards Serious Gaming for Archaeoastronomical Simulation, Mediterranean Archaeology and Archaeometry Vol.14, 271-281.Zotti, G., Wuchterl, G. (to appear): Raising Awareness of Light Pollution by Simulation of Nocturnal Light of Astronomical Cultural Heritage Sites. Proc. SEAC2014.Zotti, G. (2015): Visualization Tools and Techniques. Ch.29 in Ruggles, C.L.N. (ed.), Handbook for Archaeoastronomy and Ethnoastronomy, volume 1. Springer Reference, New York, 2015.Zotti, G., Neubauer, W. (2015). Astronomical and Topographical Orientation of Kreisgrabenanlagen in Low-er Austria. In Fernando Pimenta, N. Ribeiro, Fabio Silva, Nick Campion, A. Joaquinito, and L. Tirapicos (editors), SEAC2011 Stars and Stones: Voyages in Archaeoastronomy and Cultural Astronomy, number 2720 in BAR International Series, pages 188–193, Oxford, Archaeopress.Zotti, G., Wuchterl, G. (2016), Raising Awareness of Light Pollution by Simulation of Nocturnal Light of Astronomical Cultural Heritage Sites. In: Silva, F., Malville, K., Lomsdalen, T., Ventura, F. (eds.): The Materiality of the Sky: Proceedings of the 22nd Annual SEAC Conference, 2014, pp. 197-203. Sophia Centre Press, Ceredigion, UK, ISBN: 978-1-907767-09-8.