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Seleucus of Seleucia (Greek: Σέλευκος Seleukos; born c. 190 BC; fl. c. 150 BC) was a Hellenistic astronomer and philosopher. [1] Coming from Seleucia on the Tigris, Mesopotamia, the capital of the Seleucid Empire, or, alternatively, Seleukia on the Erythraean Sea, [2] [3] he is best known as a proponent of heliocentrism [4] [5] [6] and for his theory of the causes of tides.
Theodosius of Bithynia (Ancient Greek: Θεοδόσιος Theodosios; 2nd–1st century BC) was a Hellenistic astronomer and mathematician from Bithynia who wrote the Spherics, a treatise about spherical geometry, as well as several other books on mathematics and astronomy, of which two survive, On Habitations and On Days and Nights.
Ancient Greek astronomy can be divided into three primary phases: Classical Greek Astronomy, which encompassed the 5th and 4th centuries BC, and Hellenistic Astronomy, which encompasses the subsequent period until the formation of the Roman Empire ca. 30 BC, and finally Greco-Roman astronomy, which refers to the continuation of the tradition of ...
This was the most important contribution of Fīrūz Shah Tughlaq in the field of astronomy. Mahendra Sūri, the astronomer who wrote the first ever Sanskrit manual on astrolabes was a court astronomer of Fīrūz Shah Tughlaq. The earliest extant astrolabe constructed in India, now in a private collection in Brussels, is dated 1 February 1601.
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Near the edges of the earth is a region inhabited by fantastical creatures, monsters, and quasi-human beings. [6] Once one reaches the ends of the earth they find it to be surrounded by and delimited by an ocean (), [7] [8] as is seen in the Babylonian Map of the World, although there is one main difference between the Babylonian and early Greek view: Oceanus is a river and so has an outer ...
Babylonian astronomy was "the first and highly successful attempt at giving a refined mathematical description of astronomical phenomena." [2] According to the historian Asger Aaboe, "all subsequent varieties of scientific astronomy, in the Hellenistic world, in India, in Islam, and in the West—if not indeed all subsequent endeavour in the exact sciences—depend upon Babylonian astronomy in ...
Similar to the Yavanajātaka ("The Sayings of the Greeks"), the Pauliṣa Siddhānta is an example of Hellenistic astronomy (especially the Alexandrian school) in India during the first centuries CE. The Pauliṣa Siddhānta was particularly influential on the work of the Indian astronomer Varāhamihira .