Visualising Eclipses: Graphical Constructions of Eclipse Phenomena in the Sanskrit Astral Sciences

Eclipse reckoning constituted a significant component of the Indian astronomical tradition and was underpinned by a sophisticated interplay between mathematical theory, observational data, and visual practices. This paper focuses specifically on the diagrammatic dimensions of eclipse computations as...

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Main Authors: Dhammaloka Jambugahapitiye, Kolachana Aditya, Montelle Clemency
Format: Article
Language:English
Published: Sciendo 2025-06-01
Series:HoST
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Online Access:https://doi.org/10.2478/host-2025-0004
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author Dhammaloka Jambugahapitiye
Kolachana Aditya
Montelle Clemency
author_facet Dhammaloka Jambugahapitiye
Kolachana Aditya
Montelle Clemency
author_sort Dhammaloka Jambugahapitiye
collection DOAJ
description Eclipse reckoning constituted a significant component of the Indian astronomical tradition and was underpinned by a sophisticated interplay between mathematical theory, observational data, and visual practices. This paper focuses specifically on the diagrammatic dimensions of eclipse computations as articulated in classical Sanskrit treatises. By closely examining two distinctive passages drawn from the astronomical texts Siddhāntaśekhara and Uparāgakriyākrama, composed over the course of the second millennium CE, we investigate how Indian astronomers employed graphical methods to visually represent eclipse phenomena. These diagrammatic constructions reveal a nuanced understanding of eclipse occurrences. Our analysis highlights key features of these procedures, including the geometric frameworks, instruments, and terminologies employed. We also consider how these visual methods evolved across different texts, noting both similarities and differences in their presentation and underlying rationale. In doing so, we demonstrate how theoretical formulations and empirical observations were integrated within these visual methods, shedding light on how theory and observation informed practice and how these complex astronomical events were made accessible to broader audiences.
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spelling doaj-art-5b2ce64fc9a0492cba324c32eb4296c82025-08-20T03:49:59ZengSciendoHoST1646-77522025-06-01191709910.2478/host-2025-0004Visualising Eclipses: Graphical Constructions of Eclipse Phenomena in the Sanskrit Astral SciencesDhammaloka Jambugahapitiye0Kolachana Aditya1Montelle Clemency2Department of Classical Languages, University of Peradeniya, Sri LankaDepartment of Humanities and Social Sciences, Indian Institute of Technology Madras, IndiaSchool of Mathematics and Statistics, University of Canterbury, New ZealandEclipse reckoning constituted a significant component of the Indian astronomical tradition and was underpinned by a sophisticated interplay between mathematical theory, observational data, and visual practices. This paper focuses specifically on the diagrammatic dimensions of eclipse computations as articulated in classical Sanskrit treatises. By closely examining two distinctive passages drawn from the astronomical texts Siddhāntaśekhara and Uparāgakriyākrama, composed over the course of the second millennium CE, we investigate how Indian astronomers employed graphical methods to visually represent eclipse phenomena. These diagrammatic constructions reveal a nuanced understanding of eclipse occurrences. Our analysis highlights key features of these procedures, including the geometric frameworks, instruments, and terminologies employed. We also consider how these visual methods evolved across different texts, noting both similarities and differences in their presentation and underlying rationale. In doing so, we demonstrate how theoretical formulations and empirical observations were integrated within these visual methods, shedding light on how theory and observation informed practice and how these complex astronomical events were made accessible to broader audiences.https://doi.org/10.2478/host-2025-0004eclipsesastronomical diagramsparilekhaconstructionindian astral sciences
spellingShingle Dhammaloka Jambugahapitiye
Kolachana Aditya
Montelle Clemency
Visualising Eclipses: Graphical Constructions of Eclipse Phenomena in the Sanskrit Astral Sciences
HoST
eclipses
astronomical diagrams
parilekha
construction
indian astral sciences
title Visualising Eclipses: Graphical Constructions of Eclipse Phenomena in the Sanskrit Astral Sciences
title_full Visualising Eclipses: Graphical Constructions of Eclipse Phenomena in the Sanskrit Astral Sciences
title_fullStr Visualising Eclipses: Graphical Constructions of Eclipse Phenomena in the Sanskrit Astral Sciences
title_full_unstemmed Visualising Eclipses: Graphical Constructions of Eclipse Phenomena in the Sanskrit Astral Sciences
title_short Visualising Eclipses: Graphical Constructions of Eclipse Phenomena in the Sanskrit Astral Sciences
title_sort visualising eclipses graphical constructions of eclipse phenomena in the sanskrit astral sciences
topic eclipses
astronomical diagrams
parilekha
construction
indian astral sciences
url https://doi.org/10.2478/host-2025-0004
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AT montelleclemency visualisingeclipsesgraphicalconstructionsofeclipsephenomenainthesanskritastralsciences