The sky brightness when the rising sun is in eclipse |
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| Institution: | 1. Office of the Report on Carcinogens, Division of the National Toxicology Program, National Institute of Environmental Health Sciences (NIEHS), Research Triangle Park, NC, United States;2. Department of Structural and Cellular Biology, Laboratory of Chrono-Neuroendocrine Oncology, Tulane University School of Medicine, New Orleans, LA, United States;3. Maynooth University Department of Psychology, National University of Ireland, Maynooth, County Kildare, Ireland;4. Light and Health Program, Lighting Research Center, Rensselaer Polytechnic Institute, Troy, NY, United States;5. Department of Psychology and Center for Circadian Biology, University of California, San Diego, CA, United States;6. Division of Intramural Research, National Institute of Environmental Health Sciences, Research Triangle Park, NC, United States;7. Danish Cancer Society Research Centre, Copenhagen, Denmark;8. Department of Neuroscience, Neuroscience Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH, United States;9. Salk Institute for Biological Studies, La Jolla, CA, United States;10. Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, United States;11. Sleep Medicine, The University of Texas-Houston McGovern School of Medicine, Houston, TX, United States;12. School of Medicine, University of Connecticut, Farmington, CT, United States;13. Center for Sleep & Circadian Biology, Northwestern University, Evanston, IL, United States;14. Division of Environmental Epidemiology, Institute for Risk Assessment Sciences (IRAS), Utrecht University, Utrecht, The Netherlands;15. National Institute for Occupational Safety and Health (NIOSH), Centers for Disease Control and Prevention, Cincinnati, OH, United States;p. Office of Health Assessment and Translation, Division of the National Toxicology Program, National Institute of Environmental Health Sciences (NIEHS), Research Triangle Park, NC, United States;q. National Center on Sleep Disorders Research, Division of Lung Diseases, National Heart, Lung, and Blood Institute (NHLBI), Bethesda, MD, United States;r. Contractor in support of the NIEHS Report on Carcinogens, Integrated Laboratory Systems (ILS), Durham, NC, United States;1. Department of Computer Science Education, Universitas Pendidikan Indonesia, Bandung 40154, Indonesia;2. Department of Physics Education, Universitas Pendidikan Indonesia, Bandung 40154, Indonesia;3. Faculty of Computer and Mathematical Sciences, Universiti Teknologi MARA Cawangan Melaka Kampus Jasin, Melaka City 77300, Malaysia;4. Astronomy Research Division, Institut Teknologi Bandung, Bandung 40132, Indonesia;5. Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia;6. National Research and Innovation Agency, Jakarta 10340, Indonesia;1. CENSAM, Singapore-MIT Aliance for Reasearch and Tecnology (SMART), 1 Create Way, #09-03, 138602, Singapore;2. Singapore-ETH Centre (SEC), 1 Create Way, #06-03, 138602, Singapore;3. Department of Architecture, Massachusetts Institute of Tecnology (MIT), 265 Massachusetts Ave, MA 02139, USA |
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| Abstract: | Part of the “Xia-Shang-Zhou Chronology Project” is the study of a historical record of “double dawn” and its astronomical interpretation. We used the light meter on ordinary cameras to determine the sky variation during normal sunrises and sunsets, set up a way of calculating the variation when the rising sun is in eclipse, and identified the range and intensity of the double dawn phenomenon. For this, we organized a mass participation of the observation of the 1997-03-09 eclipse in Xinjiang Province. The observations are in good agreement with our model calculation and prove that an eclipsed sunrise could indeed give rise to the phenomenon of “double dawn” |
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