﻿ Indian astronomy : définition de Indian astronomy et synonymes de Indian astronomy (anglais)

   Publicité ▼

définition - Indian astronomy

voir la définition de Wikipedia


Indian astronomy


Historical Indian astronomy (Jyotiṣa) develops as a discipline of Vedanga or one of the "auxiliary disciplines" associated with the study of the Vedas.[1] The oldest extant text of astronomy is the treatise by Lagadha, dated to the Mauryan era (final centuries BCE).

As with other traditions, the original application of astronomy was thus religious, and would be considered astrology in modern terminology. Hindu astrology was heavily influenced by Hellenistic astrology during the early centuries of the Common Era, notably by the Yavanajataka, a Sanskrit translation of a Greek text disseminated from the 2nd century.

Indian astronomy flowered in the 6th century, with Aryabhata, whose Aryabhatiya represented the pinnacle of astronomical knowledge at the time, and significantly influenced medieval Muslim astronomy. Other astronomers of the classical era who further elaborated on Aryabhata's work include Brahmagupta, Varahamihira and Lalla. But an identifiable native Indian astronomical tradition remains active throughout the medieval period and into the 16th or 17th century, especially within the Kerala school of astronomy and mathematics.



Some cosmological concepts are present in the Vedas, as are notions of the movement of heavenly bodies and the course of the year.[1] As in other traditions, there is a close association of astronomy and religion during the early history of the science, astronomical observation being necessitated by spacial and temporal requirements of correct performance of religious ritual. Thus, the Shulba Sutras, texts dedicated to altar construction, discusses basic astronomical concepts such as the cardinal directions.[2] Jyotiṣa Vedānga as the science of observing the heavens in order to correctly perform Vedic sacrifice arises after the end of the Vedic period, during ca. the 6th to 4th centuries BCE,[3] and the work of Lagadha is informed by these earlier traditions.

By the early centuries of the Common Era, Indo-Greek influence on the Vedanga tradition becomes evident with texts such as Romaka Siddhānta and Yavanajataka. Later astronomers mention the existence of various siddhantas during this period, among them a text known as the Surya Siddhanta. But these weren't fixed texts but rather an oral tradition of knowledge, and their content is not extant. The text today known as Surya Siddhanta dates to the Gupta period and was received by Aryabhata.

The classical era of Indian astronomy begins in the late Gupta era, in the 5th to 6th centuries. The Pañcasiddhāntikā (Varahimira, 505 CE) approximates the method for determination of the meridian direction from any three positions of the shadow using Gnomon.[2] By the time of Aryabhata I the motion of planets was treated to be elliptical rather than circular.[4] Other topics included definitions of different units of time, eccentric models of planetary motion, epicyclic models of planetary motion, and planetary longitude corrections for various terrestrial locations.[4]


The divisions of the year were on the basis of religious rites and seasons (Rtu).[5] The duration from mid March—Mid May was taken to be spring (vasanta), mid May—mid July: summer ("grishma"), mid July—mid September: rains (varsha), mid September—mid November: autumn, mid November—mid January: winter, mid January—mid March: dew (śiśira).[5]

In the Vedānga Jyotiṣa, the year begins with the winter solstice.[6] Hindu calendars have several eras:




Name Year Contributions
Lagadha 1st millennium BCE The earliest astronomical text—named Vedānga Jyotiṣa details several astronomical attributes generally applied for timing social and religious events.[8] The Vedānga Jyotiṣa also details astronomical calculations, calendrical studies, and establishes rules for empirical observation.[8] Since the texts written by 1200 BCE were largely religious compositions the Vedānga Jyotiṣa has connections with Indian astrology and details several important aspects of the time and seasons, including lunar months, solar months, and their adjustment by a lunar leap month of Adhimāsa.[9] Ritus and Yugas are also described.[9] Tripathi (2008) holds that ' Twenty-seven constellations, eclipses, seven planets, and twelve signs of the zodiac were also known at that time.'[9]
Aryabhata 476–550 CE Aryabhata was the author of the Āryabhatīya and the Aryabhatasiddhanta, which, according to Hayashi (2008): 'circulated mainly in the northwest of India and, through the Sāsānian dynasty (224–651) of Iran, had a profound influence on the development of Islamic astronomy. Its contents are preserved to some extent in the works of Varahamihira (flourished c. 550), Bhaskara I (flourished c. 629), Brahmagupta (598–c. 665), and others. It is one of the earliest astronomical works to assign the start of each day to midnight.'[4] Aryabhata explicitly mentioned that the earth rotates about its axis, thereby causing what appears to be an apparent westward motion of the stars.[4] Aryabhata also mentioned that reflected sunlight is the cause behind the shining of the moon.[4] Ayrabhata's followers were particularly strong in South India, where his principles of the diurnal rotation of the earth, among others, were followed and a number of secondary works were based on them.[1]
Brahmagupta 598–668 CE Brahmasphuta-siddhanta (Correctly Established Doctrine of Brahma, 628 CE) dealt with both Indian mathematics and astronomy. Hayashi (2008) writes: 'It was translated into Arabic in Baghdad about 771 and had a major impact on Islamic mathematics and astronomy.'[10] In Khandakhadyaka (A Piece Eatable, 665 CE) Brahmagupta reinforced Aryabhata's idea of another day beginning at midnight.[10] Bahmagupta also calculated the instantaneous motion of a planet, gave correct equations for parallax, and some information related to the computation of eclipses.[1] His works introduced Indian concept of mathematics based astronomy into the Arab world.[1]
Varāhamihira 505 CE Varāhamihira was an astronomer and mathematician who studied and Indian astronomy as well as the many principles of Greek, Egyptian, and Roman astronomical sciences.[11] His Pañcasiddhāntikā is a treatise and compendium drawing from several knowledge systems.[11]
Bhāskara I 629 CE Authored the astronomical works Mahabhaskariya (Great Book of Bhaskara), Laghubhaskariya (Small Book of Bhaskara), and the Aryabhatiyabhashya (629 CE)—a commentary on the Āryabhatīya written by Aryabhata.[12] Hayashi (2008) writes 'Planetary longitudes, heliacal rising and setting of the planets, conjunctions among the planets and stars, solar and lunar eclipses, and the phases of the Moon are among the topics Bhaskara discusses in his astronomical treatises.'[12] Baskara I's works were followed by Vateśvara (880 CE), who in his eight chapter Vateśvarasiddhānta devised methods for determining the parallax in longitude directly, the motion of the equinoxes and the solstices, and the quadrant of the sun at any given time.[1]
Lalla 8th century CE Author of the Śisyadhīvrddhida (Treatise Which Expands the Intellect of Students), which corrects several assumptions of Āryabhata.[13] The Śisyadhīvrddhida of Lalla itself is divided into two parts:Grahādhyāya and Golādhyāya.[13] Grahādhyāya (Chapter I-XIII) deals with planetary calculations, determination of the mean and true planets, three problems pertaining to diurnal motion of Earth, eclipses, rising and setting of the planets, the various cusps of the moon, planetary and astral conjunctions, and complementary situations of the sun and the moon.[13] The second part—titled Golādhyāya (chapter XIV–XXII)—deals with graphical representation of planetary motion, astronomical instruments, spherics, and emphasizes on corrections and rejection of flawed principles.[13] Lalla shows influence of Āryabhata, Brahmagupta, and Bhāskara I.[13] His works were followed by later astronomers Śrīpati, Vateśvara, and Bhāskara II.[13] Lalla also authored the Siddhāntatilaka.[13]
Mahendra Suri 14th century CE Mahendra Suri authored the Yantra-rāja (The King of Instruments, written in 1370 CE)—a Sanskrit work on the astrolabe, itself introduced in India during the reign of the 14th century Tughlaq dynasty ruler Firuz Shah Tughluq (1351–1388 CE).[16] Suri seems to have been a Jain astronomer in the service of Firuz Shah Tughluq.[16] The 182 verse Yantra-rāja mentions the astrolabe from the first chapter onwards, and also presents a fundamental formula along with a numerical table for drawing an astrolabe although the proof itself has not been detailed.[16] Longitudes of 32 stars as well as their latitudes have also been mentioned.[16] Mahendra Suri also explained the Gnomon, equatorial co-ordinates, and elliptical co-ordinates.[16] The works of Mahendra Suri may have influenced later astronomers like Padmanābha (1423 CE)—author of the Yantra-rāja-adhikāra, the first chapter of his Yantra-kirnāvali.[16]
Nilakanthan Somayaji 1444–1544 CE In 1500, Nilakanthan Somayaji of the Kerala school of astronomy and mathematics, in his Tantrasangraha, revised Aryabhata's model for the planets Mercury and Venus. His equation of the centre for these planets remained the most accurate until the time of Johannes Kepler in the 17th century.[17] Nilakanthan Somayaji, in his Aryabhatiyabhasya, a commentary on Aryabhata's Aryabhatiya, developed his own computational system for a partially heliocentric planetary model, in which Mercury, Venus, Mars, Jupiter and Saturn orbit the Sun, which in turn orbits the Earth, similar to the Tychonic system later proposed by Tycho Brahe in the late 16th century. Nilakantha's system, however, was mathematically more efficient than the Tychonic system, due to correctly taking into account the equation of the centre and latitudinal motion of Mercury and Venus. Most astronomers of the Kerala school of astronomy and mathematics who followed him accepted his planetary model.[17][18] He also authored a treatise titled Jyotirmimamsa stressing the necessity and importance of astronomical observations to obtain correct parameters for computations.
Acyuta Pisārati 1550–1621 CE Sphutanirnaya (Determination of True Planets) details an elliptical correction to existing notions.[19] Sphutanirnaya was later expanded to Rāśigolasphutānīti (True Longitude Computation of the Sphere of the Zodiac).[19] Another work, Karanottama deals with eclipses, complementary relationship between the sun and the moon, and 'the derivation of the mean and true planets'.[19] In Uparāgakriyākrama (Method of Computing Eclipses), Acyuta Pisārati suggests improvements in methods of calculation of eclipses.[19]

  Instruments used

  Sawai Jai Singh (1688–1743 CE) initiated the construction of several observatories. Shown here is the Jantar Mantar (Jaipur) observatory.
  Yantra Mandir (completed by 1743 CE), Delhi.
  Astronomical instrument with graduated scale and notation in Hindu-Arabic numerals.
  Detail of an instrument in the Jaipur observatory.

Among the devices used for astronomy was Gnomon, known as Sanku, in which the shadow of a vertical rod is applied on a horizontal plane in order to ascertain the cardinal directions, the latitude of the point of observation, and the time of observation.[20] This device finds mention in the works of Varāhamihira, Āryabhata, Bhāskara, Brahmagupta, among others.[2] The Cross-staff, known as Yasti-yantra, was used by the time of Bhaskara II (1114–1185 CE).[20] This device could vary from a simple stick to V-shaped staffs designed specifically for determining angles with the help of a calibrated scale.[20] The clepsydra (Ghatī -yantra) was used in India for astronomical purposes until recent times.[20] Ōhashi (2008) notes that: "Several astronomers also described water-driven instruments such as the model of fighting sheep."[20]

The armillary sphere was used for observation in India since early times, and finds mention in the works of Āryabhata (476 CE).[21] The Goladīpikā—a detailed treatise dealing with globes and the armillary sphere was composed between 1380–1460 CE by Parameśvara.[21] On the subject of the usage of the armillary sphere in India, Ōhashi (2008) writes: "The Indian armillary sphere (gola-yantra) was based on equatorial coordinates, unlike the Greek armillary sphere, which was based on ecliptical coordinates, although the Indian armillary sphere also had an ecliptical hoop. Probably, the celestial coordinates of the junction stars of the lunar mansions were determined by the armillary sphere since the seventh century or so. There was also a celestial globe rotated by flowing water."[20]

An instrument invented by the mathematician and astronomer Bhaskara II (1114–1185 CE) consisted of a rectangular board with a pin and an index arm.[20] This device—called the Phalaka-yantra—was used to determine time from the sun's altitude.[20] The Kapālayantra was a equatorial sundial instrument used to determine the sun’s azimuth.[20] Kartarī-yantra combined two semicircular board instruments to give rise to a 'scissors instrument'.[20] Introduced from the Islamic world and first finding mention in the works of Mahendra Sūri—the court astronomer of Firuz Shah Tughluq (1309–1388 CE)—the astrolabe was further mentioned by Padmanābha (1423 CE) and Rāmacandra (1428 CE) as its use grew in India.[20]

Invented by Padmanābha, a nocturnal polar rotation instrument consisted of a rectangular board with a slit and a set of pointers with concentric graduated circles.[20] Time and other astronomical quantities could be calculated by adjusting the slit to the directions of α and β Ursa Minor.[20] Ōhashi (2008) further explains that: "Its backside was made as a quadrant with a plumb and an index arm. Thirty parallel lines were drawn inside the quadrant, and trigonometrical calculations were done graphically. After determining the sun’s altitude with the help of the plumb, time was calculated graphically with the help of the index arm."[20]

Ōhashi (2008) reports on the observatories constructed by Jai Singh II of Amber:

The Mahārāja of Jaipur, Sawai Jai Singh (AD 1688–1743), constructed five astronomical observatories at the beginning of the eighteenth century. The observatory in Mathura is not extant, but those in Delhi, Jaipur, Ujjain, and Banaras are. There are several huge instruments based on Hindu and Islamic astronomy. For example, the samrāt.-yantra (emperor instrument) is a huge sundial which consists of a triangular gnomon wall and a pair of quadrants toward the east and west of the gnomon wall. Time has been graduated on the quadrants.[20]

The seamless celestial globe invented in Mughal India, specifically Lahore and Kashmir, is considered to be one of the most impressive astronomical instruments and remarkable feats in metallurgy and engineering. All globes before and after this were seamed, and in the 20th century, it was believed by metallurgists to be technically impossible to create a metal globe without any seams, even with modern technology. It was in the 1980s, however, that Emilie Savage-Smith discovered several celestial globes without any seams in Lahore and Kashmir. The earliest was invented in Kashmir by Ali Kashmiri ibn Luqman in 998 AH (1589–90 CE) during Akbar the Great's reign; another was produced in 1070 AH (1659–60 CE) by Muhammad Salih Tahtawi with Arabic and Sanskrit inscriptions; and the last was produced in Lahore by a Hindu metallurgist Lala Balhumal Lahuri in 1842 during Jagatjit Singh Bahadur's reign. 21 such globes were produced, and these remain the only examples of seamless metal globes. These Mughal metallurgists developed the method of lost-wax casting in order to produce these globes.[22]

  Global discourse

  Greek equatorial sun dial, Ai-Khanoum, Afghanistan 3rd-2nd century BCE.

With the rise of Greek culture in the east, Hellenistic astronomy filtered eastwards to India where its profound influence became apparent in the early centuries AD.[23] For example, Hellenistic astronomy is known to have been practiced near India in the Greco-Bactrian city of Ai-Khanoum from the 3rd century BCE. Various sun-dials, including an equatorial sundial adjusted to the latitude of Ujjain have been found in archaeological excavations there.[24] Numerous interactions with the Mauryan Empire, and the later expansion of the Indo-Greeks into India suggest that transmission of Greek astronomical ideas to India occurred during this period.[25] The Greek concept of a spherical earth surrounded by the spheres of planets, vehemently supported by astronomers like Varahamihira and Brahmagupta, supplanted the long-standing Indian cosmological belief into a flat and circular earth disk.[23][26]

Several Greco-Roman astrological treatises are also known to have been imported into India during the first few centuries of our era. The Yavanajataka ("Sayings of the Greeks") was translated from Greek to Sanskrit by Yavanesvara during the 2nd century CE, under the patronage of the Western Satrap Saka king Rudradaman I.[citation needed] Rudradaman's capital at Ujjain "became the Greenwich of Indian astronomers and the Arin of the Arabic and Latin astronomical treatises; for it was he and his successors who encouraged the introduction of Greek horoscopy and astronomy into India."[27]

Later in the 6th century, the Romaka Siddhanta ("Doctrine of the Romans"), and the Paulisa Siddhanta ("Doctrine of Paul") were considered as two of the five main astrological treatises, which were compiled by Varahamihira in his Pañca-siddhāntikā ("Five Treatises").[28] Varahamihira wrote in the Brihat-Samhita: "The Greeks, though impure, must be honored since they were trained in sciences and therein, excelled others....."[29] Another Indian text, the Gargi-Samhita, also similarly compliments the Yavanas (Greeks) saying: "The Yavanas are barbarians yet the science of astronomy originated with them and for this they must be revered like gods".,[30] while the Mahabharata compliments them as "the all-knowing Yavanas" (sarvajnaa yavanaa), "The Yavanas, O king, are all-knowing; the Suras are particularly so. The mlecchas are wedded to the creations of their own fancy."[31]

Indian astronomy reached China with the expansion of Buddhism during the Later Han dynasty (25–220 CE).[32] Further translation of Indian works on astronomy was completed in China by the Three Kingdoms era (220–265 CE).[32] However, the most detailed incorporation of Indian astronomy occurred only during the Tang Dynasty (618–907) when a number of Chinese scholars—such as Yi Xing— were versed both in Indian and Chinese astronomy.[32] A system of Indian astronomy was recorded in China as Jiuzhi-li (718 CE), the author of which was an Indian by the name of Qutan Xida—a translation of Devanagari Gotama Siddha—the director of the Tang dynasty's national astronomical observatory.[32]

Fragments of texts during this period indicate that Arabs adopted the sine function (inherited from Indian mathematics) instead of the chords of arc used in Hellenistic mathematics.[33] Another Indian influence was an approximate formula used for timekeeping by Muslim astronomers.[34] Through Islamic astronomy, Indian astronomy had an influence on European astronomy via Arabic translations. During the Latin translations of the 12th century, Muhammad al-Fazari's Great Sindhind, which was based on the Surya Siddhanta and the works of Brahmagupta, was translated into Latin in 1126 and was influential at the time.[35]

In the 17th century, the Mughal Empire saw a synthesis between Islamic and Hindu astronomy, where Islamic observational instruments were combined with Hindu computational techniques. While there appears to have been little concern for planetary theory, Muslim and Hindu astronomers in India continued to make advances in observational astronomy and produced nearly a hundred Zij treatises. Humayun built a personal observatory near Delhi, while Jahangir and Shah Jahan were also intending to build observatories but were unable to do so. After the decline of the Mughal Empire, it was a Hindu king, Jai Singh II of Amber, who attempted to revive both the Islamic and Hindu traditions of astronomy which were stagnating in his time. In the early 18th century, he built several large observatories called Yantra Mandirs in order to rival Ulugh Beg's Samarkand observatory and in order to improve on the earlier Hindu computations in the Siddhantas and Islamic observations in Zij-i-Sultani. The instruments he used were influenced by Islamic astronomy, while the computational techniques were derived from Hindu astronomy.[36][37]

Some scholars have suggested that knowledge of the results of the Kerala school of astronomy and mathematics may have been transmitted to Europe through the trade route from Kerala by traders and Jesuit missionaries.[38] Kerala was in continuous contact with China and Arabia, and Europe. The existence of circumstantial evidence[39] such as communication routes and a suitable chronology certainly make such a transmission a possibility. However, there is no direct evidence by way of relevant manuscripts that such a transmission took place.[38]

In the early 18th century, Jai Singh II of Amber invited European Jesuit astronomers to one of his Yantra Mandir observatories, who had bought back the astronomical tables compiled by Philippe de La Hire in 1702. After examining La Hire's work, Jai Singh concluded that the observational techniques and instruments used in European astronomy were inferior to those used in India at the time. It is uncertain whether he was aware of the Copernican Revolution via the Jesuits.[40] He did, however, employ the use of telescopes. In his Zij-i Muhammad Shahi, he states: "telescopes were constructed in my kingdom and using them a number of observations were carried out."[41]

Following the arrival of the British East India Company in the 18th century, the Hindu and Islamic traditions were slowly displaced by European astronomy, though there were attempts at harmonizing these traditions. The Indian scholar Mir Muhammad Hussain had travelled to England in 1774 to study Western science and, on his return to India in 1777, he wrote a Persian treatise on astronomy. He wrote about the heliocentric model, and argued that there exists an infinite number of universes (awalim), each with their own planets and stars, and that this demonstrates the omnipotence of God, who is not confined to a single universe. Hussain's idea of a universe resembles the modern concept of a galaxy, thus his view corresponds to the modern view that the universe consists of billions of galaxies, each one consisting of billions of stars.[42] The last known Zij treatise was the Zij-i Bahadurkhani, written in 1838 by the Indian astronomer Ghulam Hussain Jaunpuri (1760–1862) and printed in 1855, dedicated to Bahadur Khan. The treatise incorporated the heliocentric system into the Zij tradition.[43]

  See also

  Further reading


  1. ^ a b c d e f g Sarma (2008), Astronomy in India
  2. ^ a b c Abraham (2008)
  3. ^ Ōhashi (1993)
  4. ^ a b c d e Hayashi (2008), Aryabhata I
  5. ^ a b c J.A.B. van Buitenen (2008)
  6. ^ Bryant (2001), 253
  7. ^ See A. Cunningham (1883), A Book of Indian Eras.
  8. ^ a b Subbaarayappa (1989)
  9. ^ a b c Tripathi (2008)
  10. ^ a b Hayashi (2008), Brahmagupta
  11. ^ a b Varāhamihira. Encyclopædia Britannica (2008)
  12. ^ a b Hayashi (2008), Bhaskara I
  13. ^ a b c d e f g Sarma (2008), Lalla
  14. ^ Hayashi (2008), Bhaskara II
  15. ^ Hayashi (2008), Shripati
  16. ^ a b c d e f Ōhashi (1997)
  17. ^ a b Joseph, 408
  18. ^ Ramasubramanian etc. (1994)
  19. ^ a b c d Sarma (2008), Acyuta Pisarati
  20. ^ a b c d e f g h i j k l m n o Ōhashi (2008), Astronomical Instruments in India
  21. ^ a b Sarma (2008), Armillary Spheres in India
  22. ^ Savage-Smith (1985)
  23. ^ a b D. Pingree: "History of Mathematical Astronomy in India", Dictionary of Scientific Biography, Vol. 15 (1978), pp. 533−633 (533, 554f.)
  24. ^ Pierre Cambon, Jean-François Jarrige. "Afghanistan, les trésors retrouvés: Collections du Musée national de Kaboul". Éditions de la Réunion des musées nationaux, 2006 - 297 pages. p269 [1]
  27. ^ Pingree, David "Astronomy and Astrology in India and Iran" Isis, Vol. 54, No. 2 (Jun., 1963), pp. 229-246
  29. ^ ":Mleccha hi yavanah tesu samyak shastram idam sthitam
    Rsivat te api pujyante kim punar daivavid dvijah
    -(Brhatsamhita 2.15)
  30. ^ Yavana#cite_note-13
  31. ^ Yavana#cite note-10
  32. ^ a b c d See Ōhashi (2008) in Astronomy: Indian Astronomy in China.
  33. ^ Dallal, 162
  34. ^ King, 240
  35. ^ Joseph, 306
  36. ^ Sharma (1995), 8–9
  37. ^ Baber, 82–89
  38. ^ a b Almeida etc. (2001)
  39. ^ Raju (2001)
  40. ^ Baber, 89–90
  42. ^ S. M. Razaullah Ansari (2002), History of oriental astronomy: proceedings of the joint discussion-17 at the 23rd General Assembly of the International Astronomical Union, organised by the Commission 41 (History of Astronomy), held in Kyoto, August 25–26, 1997, Springer, pp. 133–4, ISBN 1-4020-0657-8 


  • Abraham, G. (2008), "Gnomon in India", Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures (2nd edition) edited by Helaine Selin, pp. 1035–1037, Springer, ISBN 978-1-4020-4559-2.
  • Almeida, D. F. etc. (2001), "Keralese Mathematics: Its Possible Transmission to Europe and the Consequential Educational Implications", Journal of Natural Geometry, 20:77–104.
  • Dallal, Ahmad (1999), "Science, Medicine and Technology", The Oxford History of Islam edited by John Esposito, Oxford University Press.
  • Hayashi, Takao (2008), Aryabhata I, Encyclopædia Britannica.
  • Hayashi, Takao (2008), Bhaskara I, Encyclopædia Britannica.
  • Hayashi, Takao (2008), Brahmagupta, Encyclopædia Britannica.
  • Hayashi, Takao (2008), Shripati, Encyclopædia Britannica.
  • J.A.B. van Buitenen (2008), calendar, Encyclopædia Britannica.
  • Klostermaier, Klaus K. (2003), "Hinduism, History of Science and Religion", Encyclopedia of Science and Religion edited by J. Wentzel Vrede van Huyssteen, pp. 405–410, Macmillan Reference USA, ISBN 0-02-865704-7.
  • Raju, C. K. (2001), "Computers, Mathematics Education, and the Alternative Epistemology of the Calculus in the Yuktibhasa", Philosophy East and West, 51 (3): 325–362.
  • Sarma, K.V. (2008), "Acyuta Pisarati", Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures (2nd edition) edited by Helaine Selin, p. 19, Springer, ISBN 978-1-4020-4559-2.
  • Sarma, K.V. (2008), "Armillary Spheres in India", Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures (2nd edition) edited by Helaine Selin, p. 243, Springer, ISBN 978-1-4020-4559-2.
  • Sarma, K.V. (2008), "Astronomy in India", Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures (2nd edition) edited by Helaine Selin, pp. 317–321, Springer, ISBN 978-1-4020-4559-2.
  • Sarma, K.V. (2008), "Lalla", Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures (2nd edition) edited by Helaine Selin, p. 1215, Springer, ISBN 978-1-4020-4559-2.
  • Sarma, Nataraja (2000), "Diffusion of Astronomy in the Ancient World", Endeavour, 24 (2000): 157-164.
  • Sharma, V.N. (1995), Sawai Jai Singh and His Astronomy, Motilal Banarsidass, ISBN 81-208-1256-5.
  • Sharma, V.N. (2008), "Observatories in India", Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures (2nd edition) edited by Helaine Selin, pp. 1785–1788, Springer, ISBN 978-1-4020-4559-2.
  • Subbaarayappa, B.V. (1989), "Indian astronomy: an historical perspective", Cosmic Perspectives edited by Biswas etc., pp. 25–41. Cambridge University Press. ISBN 0-521-34354-2.

   Publicité ▼


Toutes les traductions de Indian astronomy

Contenu de sensagent

  • définitions
  • synonymes
  • antonymes
  • encyclopédie

  • definition
  • synonym

   Publicité ▼

dictionnaire et traducteur pour sites web



Essayer ici, télécharger le code;

Solution commerce électronique

Augmenter le contenu de votre site


Parcourir les produits et les annonces

Obtenir des informations en XML pour filtrer le meilleur contenu.

Indexer des images et définir des méta-données

Fixer la signification de chaque méta-donnée (multilingue).

Renseignements suite à un email de description de votre projet.

Jeux de lettres

Les jeux de lettre français sont :
○   Anagrammes
○   jokers, mots-croisés
○   Lettris
○   Boggle.





Dictionnaire de la langue française
Principales Références

L'encyclopédie française bénéficie de la licence Wikipedia (GNU).


Changer la langue cible pour obtenir des traductions.


7458 visiteurs en ligne

calculé en 0,063s

Je voudrais signaler :
section :
une faute d'orthographe ou de grammaire
un contenu abusif (raciste, pornographique, diffamatoire)
une violation de copyright
une erreur
un manque
merci de préciser :