Academic literature on the topic 'Astronomical alignment'

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Journal articles on the topic "Astronomical alignment"

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Šprajc, Ivan. "Astronomical aspects of Group E-type complexes and implications for understanding ancient Maya architecture and urban planning." PLOS ONE 16, no. 4 (2021): e0250785. http://dx.doi.org/10.1371/journal.pone.0250785.

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In the 1920s, during the first archaeological excavations at Uaxactún, Petén, Guatemala, an architectural complex named Group E was interpreted as an ancient Maya astronomical observatory, intended specifically for sighting the equinoctial and solstitial sunrises. In the following decades, a large number of architectural compounds with the same configuration have been found, most of them in the central lowlands of the Yucatan peninsula. The multiple hypotheses that have been proposed about the astronomical function of these complexes, commonly designated as E Groups, range from those attributi
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Usman, Usaina Shehu, Anas Abbas Ibrahim, and Yahaya (Ph.D) Chamayo. "Comparative Analysis of the Apparent Movement of the Sun in Relation to Mosque Direction Sitting in Gumel Town of Nigeria." International Journal of Religion and Societal Development 2, no. 1 (2025): 1–13. https://doi.org/10.5281/zenodo.14845620.

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<em>This study investigates the alignment of mosques in Gumel Town, Nigeria, with the apparent movement of the sun, focusing on the accuracy of their orientation towards the Qibla. A mixed-methods approach, incorporating surveys, interviews, and astronomical observations, revealed significant deviations in mosques' orientation. These discrepancies are attributed to the reliance on traditional methods, limited astronomical knowledge, and cultural/architectural influences. The findings emphasize the need for education and awareness on precise Qibla direction and astronomical methods in mosque de
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Silva, Olavo Fagundes da. "Cartography of archaeoastronomical techniques in the Calçoene equinoctial cromlech." Concilium 23, no. 3 (2023): 299–328. http://dx.doi.org/10.53660/clm-894-23b41.

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The AP-CA-18 archaeological site of Calçoene, located in the northern Brazilian Amazon, has a megalithic arrangement in the shape of an irregular circle, constituting a cromlech with menhirs of azimuths and well-defined zenith angles. From the perspective of current academic astronomy, it prints a strict relationship with the observation of astronomical events, notably equinoxes and solstices. Without intending to interfere in the anthropological studies of the social group that built it, this work, based on cartography and support in geotechnologies, analyzed the shapes, layout, orientation a
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Spathopoulos, Vassilios McInnes. "Van Gogh’s summer sunsets: an astronomical approach to art analysis." Physics Education 60, no. 4 (2025): 043006. https://doi.org/10.1088/1361-6552/ade10c.

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Abstract This study applies astronomical analysis to two Vincent van Gogh paintings from the summer of 1888, demonstrating how scientific principles can deepen our understanding of artistic works. While previous research has shown that van Gogh occasionally placed celestial bodies in positions significantly different from their astronomical reality, the analysis of Wheat Field with the Setting Sun and Canal with Women Washing reveals a close alignment with expected astronomical positions. This contrast suggests that van Gogh made conscious decisions about celestial positioning, sometimes prior
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Luna, E., S. Zazueta, and L. Gutiérrez. "An Innovative Method for the Alignment of Astronomical Telescopes." Publications of the Astronomical Society of the Pacific 113, no. 781 (2001): 379–84. http://dx.doi.org/10.1086/319330.

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Semenov, Aleksandr, Magomed Abdulkadyrov, Nikolay Dobrikov, et al. "Computer Generated Holograms (CGH) for Testing, Alignment and Positioning of Astronomical and Space Mirrors Aspherical Surfaces." EPJ Web of Conferences 215 (2019): 09002. http://dx.doi.org/10.1051/epjconf/201921509002.

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JSC LZOS successfully applies Computer Generated Holograms (CGH) for testing of on- and off-axis surfaces of large-dimensioned optical components for their alignment with respect to interferometer, for defining of aspherical surface optical vertex position with respect to the geometrical center and for optical systems alignment. All this allows producing of large-dimensioned aspherical on- and off-axis astronomical and space mirrors with high accuracy.
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Hu, Z. W., and R. P. Winarski. "Elementary Composite Binary and Grain Alignment Locked in Dust Growth." Astrophysical Journal Letters 923, no. 1 (2021): L4. http://dx.doi.org/10.3847/2041-8213/ac391e.

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Abstract Planets are known to grow out of a star-encircling disk of the gas and dust inherited from an interstellar cloud; their formation is thought to begin with coagulation of submicron dust grains into aggregates, the first foundational stage of planet formation. However, with nanoscale and submicron solids unobservable directly in the interstellar medium (ISM) and protoplanetary disks, how dust grains grow is unclear, as are the morphology and structure of interstellar grains and the whereabouts and form of “missing iron.” Here we show an elementary composite binary in 3D sub-10 nm detail
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Vlasenko, Vladimir, Sergii Khlamov, and Vadym Savanevych. "Devising a procedure for the brightness alignment of astronomical frames background by a high frequency filtration to improve accuracy of the brightness estimation of objects." Information technology. Industry control systems 2, no. 2 (128) (2024): 31–38. http://dx.doi.org/10.15587/1729-4061.2024.301327.

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The object of this study is the background substrate of astronomical frames. To detect and compare the image of an object in a frame with its real image from astronomical catalogs, it is necessary to uniformly distribute the brightness of the background image substrate. Most often, the background alignment of astronomical frames is performed using the hardware calibration method applying the construction of service frames. However, it does not make it possible to eliminate the background from temporary stray light. Therefore, to solve this problem, a procedure has been proposed for brightness
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Dinculescu, A. "On a possible alignment of elementary spin vectors in astronomical bodies." Gravitation and Cosmology 14, no. 4 (2008): 336–40. http://dx.doi.org/10.1134/s0202289308040087.

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Zhou Mingyao, 周明尧, 侯俊峰 Hou Junfeng, 王东光 Wang Dongguang, and 邓元勇 Deng Yuanyong. "Design and Verification of Depolarized Derotator Alignment Scheme in Astronomical Telescope." Chinese Journal of Lasers 47, no. 6 (2020): 0604005. http://dx.doi.org/10.3788/cjl202047.0604005.

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Dissertations / Theses on the topic "Astronomical alignment"

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Schmid, Tobias. "Misalignment Induced Nodal Aberration Fields and Their Use in the Alignment of Astronomical Telescopes." Doctoral diss., University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3629.

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Following the foundation of aberration theory for rotationally symmetric optical systems established by Seidel, Schwarzschild, Burch, Conrady, Buchdahl, and in its most useful form H.H. Hopkins, Shack, Buchroeder, Thompson, and Rogers developed a vectorial form of the wave aberration theory that enables addressing optical systems without symmetry. In this research, a vectorial theory is utilized and extended for the alignment of two- and three-mirror astronomical telescopes, including the effects of pointing changes and astigmatic figure errors. Importantly, it is demonstrated that the vectori
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Kim, Jihun. "Assembly of a large common mount astronomical interferometer." Thesis, The University of Arizona, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3559991.

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<p>A large multi-aperture telescope has the potential to reach the diffraction limit corresponding to its baseline. To do so, Adaptive Optics (AO) and beam combination are critical to good performance. Operation as an interferometer is a complicated mode for the telescope. The system now has much tighter tolerances and is difficult to align. The alignment process needs to be planned in multiple steps, and tolerance and sensitivity analysis needs to be performed for each step. Alignment tools can be prepared based on the resolution found in the sensitivity analysis in each step. </p><p> Rand
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Umbriaco, Gabriele. "Exoplanets through extreme optics: from PLATO to SHARK-NIR." Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3422828.

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In the last years, the Observatory of Padova (Istituto Nazionale di Astrofisica – Osservatorio Astronomico di Padova) and the University of Padova have been involved massively in projects dedicated to the exoplanets search, both ground, and space-based. SHARK-NIR, the acronym of “System for coronagraphy with High order Adaptive optics from R to K band – Near-Infrared”, is an instrument designed to search and characterize the young exo-planetary system and star-forming regions in the NIR domain, in coronagraphic direct imaging and spectroscopic mode. It has been selected for the 2nd generation
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Kamga, Morgan M. "Optimising alignment of a multi-element telescope." Thesis, 2013. http://hdl.handle.net/10539/12677.

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A thesis submitted to the Faculty of Science in fulfillment of the requirements of the degree of Doctor of Philosophy School of Computational and Applied Mathematics University of the Witwatersrand September 20, 2012<br>In this thesis, we analyse reasons for poor image quality on the Southern African Large Telescope (SALT) and we analyse control methods of the segmented primary mirror. Errors in the control algorithm of SALT (circa 2007) are discovered. More powerful numerical procedures are developed and in particular, we show that singular value decomposition method is preferred ov
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Books on the topic "Astronomical alignment"

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D, Peterson Lee, Guyer Robert C, and Society of Photo-optical Instrumentation Engineers., eds. Space systems engineering and optical alignment mechanisms: 4-6 August 2004, Denver, Colorado, USA. SPIE, 2004.

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(Foreword), Marilyn Head, ed. The Transit of Venus: How a Rare Astronomical Alignment Changed the World (Awa Science). Awa Press, 2008.

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Book chapters on the topic "Astronomical alignment"

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MacGillivray, H. T., and R. J. Dodd. "Alignment of Spiral Galaxies in the Local Supercluster." In Third Asian-Pacific Regional Meeting of the International Astronomical Union. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4630-9_60.

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Feustel, Ortwin. "The Holy Alignment: Geodesic and Astronomical Fundamentals for Calculating the Adjustment of Medieval Naves." In Nexus Network Journal. Birkhäuser Basel, 2009. http://dx.doi.org/10.1007/978-3-7643-8974-1_2.

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Ziółkowski, Mariusz, and Jacek Kościuk. "Astronomical Observations at Machu Picchu: Facts, Hypothesis and Wishful Thinking." In Machu Picchu in Context. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92766-0_5.

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AbstractThe aim of this text has been the evaluation of the hypotheses, formulated by various authors, on the possible astronomical function of seven structures and architectural ensembles located in the Llaqta of Machu Picchu and its immediate vicinity: the Temple of the Sun, the Room of the Mortars, the cave of Intimachay, the Temple of Condor, the Intihuatana, the Mirador de Inkaraqay, the River Intihuatana as well as the site of Llactapata. Apart from the Room of the Mortars, whose astronomical function was revealed to be dubious, the remaining six ensembles present well-documented evidenc
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"8. Orientation and Alignment: Astronomical Concerns." In Inka Settlement Planning. University of Texas Press, 1990. https://doi.org/10.7560/738522-010.

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Arun, Shashikant, and Kumar Singh. "ASTRONOMICAL IMAGE PROCESSING USING LINUX." In Futuristic Trends in Physical Sciences Volume 3 Book 1. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3bkps1ch18.

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Astronomical image processing plays a crucial role in extracting valuable information from the vast amount of data collected by modern telescopes and observatories. This chapter aims to provide a comprehensive guide to astronomical image processing techniques in the Linux environment. The chapter begins with an introduction to the significance of image processing in astronomy, highlighting its role in enhancing image quality, removing noise, and revealing hidden details. It further discusses the advantages of using Linux as a platform for astronomical image processing due to its flexibility, o
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Ostlie, Dale A. "The Heavens: Realm of Mystery." In Astronomy: The Human Quest for Understanding. Oxford University PressOxford, 2022. http://dx.doi.org/10.1093/oso/9780198825821.003.0002.

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Abstract The Heavens: A Realm of Mystery is comprised of two major sections. The first section gives an overview of what can be seen with the naked eye and by direct human experience, such as observations of the celestial motions of the stars over the course of a day, throughout the year, and at different latitudes, the changing of the Sun’s path across the sky according to the seasons; the phases of the Moon; the strange movements of the “wandering stars,” the arrival of comets and meteors, the sudden appearance of “new stars,” and the Milky Way. Section 2 presents a brief discussion of archa
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Barrett, R. P. "Digitally recreating Ballynahatty and simulating astronomical alignments in Irish timber circles." In Ballynahatty. Oxbow Books, 2023. http://dx.doi.org/10.2307/jj.20307749.17.

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Šprajc, Ivan. "Pyramids Marking Time: Anthony F. Aveni’s Contribution to the Study of Astronomical Alignments in Mesoamerican Architecture." In Cosmology, Calendars, and Horizon-Based Astronomy in Ancient Mesoamerica. University Press of Colorado, 2015. http://dx.doi.org/10.5876/9781607323792.c002.

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Conference papers on the topic "Astronomical alignment"

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Longval, Y., B. Mot, P. Ade, et al. "PILOT optical alignment." In SPIE Astronomical Telescopes + Instrumentation, edited by Howard A. MacEwen, Giovanni G. Fazio, Makenzie Lystrup, Natalie Batalha, Nicholas Siegler, and Edward C. Tong. SPIE, 2016. http://dx.doi.org/10.1117/12.2232892.

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Laurent, Florence, Edgard Renault, Didier Boudon, et al. "MUSE alignment onto VLT." In SPIE Astronomical Telescopes + Instrumentation, edited by Ramón Navarro, Colin R. Cunningham, and Allison A. Barto. SPIE, 2014. http://dx.doi.org/10.1117/12.2057075.

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Gitton, Philippe B., Michael Cantzler, Bertrand Koehler, and P. Kervella. "VLTI image alignment monitoring." In Astronomical Telescopes and Instrumentation, edited by Wesley A. Traub. SPIE, 2003. http://dx.doi.org/10.1117/12.459741.

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Mast, Terry S., Jerry E. Nelson, Gary A. Chanan, and Lothar Noethe. "CELT optics Alignment Procedure." In Astronomical Telescopes and Instrumentation, edited by J. Roger P. Angel and Roberto Gilmozzi. SPIE, 2003. http://dx.doi.org/10.1117/12.459966.

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Jurgenson, C. A., D. F. Buscher, M. J. Creech-Eakman, et al. "MROI's automated alignment system." In SPIE Astronomical Telescopes + Instrumentation, edited by John D. Monnier, Markus Schöller, and William C. Danchi. SPIE, 2006. http://dx.doi.org/10.1117/12.672531.

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Laurent, Florence, Edgard Renault, Magali Loupias, et al. "MUSE optical alignment procedure." In SPIE Astronomical Telescopes + Instrumentation, edited by Ian S. McLean, Suzanne K. Ramsay, and Hideki Takami. SPIE, 2012. http://dx.doi.org/10.1117/12.926975.

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Shtromberg, A. V., C. A. Jurgenson, D. F. Buscher, et al. "MROI's automated alignment system." In SPIE Astronomical Telescopes + Instrumentation. SPIE, 2008. http://dx.doi.org/10.1117/12.790035.

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Guisard, Stephane. "Optical alignment of the VLTI." In Astronomical Telescopes and Instrumentation, edited by Wesley A. Traub. SPIE, 2003. http://dx.doi.org/10.1117/12.461579.

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Noethe, Lothar, and Stephane Guisard. "Final alignment of the VLT." In Astronomical Telescopes and Instrumentation, edited by Philippe Dierickx. SPIE, 2000. http://dx.doi.org/10.1117/12.391501.

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Rakich, Andrew P., and Dijana Bugonovic. "A laser-tracker-target fiducialized alignment telescope for astronomical telescope alignment." In Ground-based and Airborne Telescopes IX, edited by Heather K. Marshall, Jason Spyromilio, and Tomonori Usuda. SPIE, 2022. http://dx.doi.org/10.1117/12.2629817.

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