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Uin Walisongo Semarang
Religion Arts Humanities Economics, Econometrics & Finance

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Journal : Islam Futura

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SEJARAH PERKEMBANGAN ILMU FALAK DALAM PERADABAN INDIA DAN KETERKAITANNYA DENGAN ISLAM reza akbar
Islam Futura Vol 17, No 1 (2017): Jurnal Ilmiah Islam Futura
Publisher : Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/jiif.v17i1.1511

Abstract

Although it is acknowledged that Islamic astronomy developed very rapidly during the Abbasid period (750-1258 AD), it should be noted that before the advancement of astronomy of the Islamic world, Muslim scholars of the time were very incentive to translate astronomical books from other nations, one of them was from India. There were at least two factors that led to the emergence and development of astronomical science in pre-Islamic Indian civilization. The first, the teachings of Hinduism that made the sun as the ruler and source of life. The second, the influence of civilization from other nations such as Egypt, Persia, and Greece. In pre-Islamic times, there were a number of names of historical figures of Indian astronomy namely Lagadha, Yajnavalkya (800-900 BC), Aitareya Brahmana (about 900-800 BC), Aryabhata (476-550 AD), Varahamihira (499-587 AD) Brahmagupta (598-668 AD), Bhaskara II (1114-1185 AD), and Nilakantha Somayaji (1444-1544 AD). While in Islam, there was a number of names namely Mulla Farid, Mulla Chand, Mulla Tayyib, Mulla Mahmud Jaunpuri (1606-1651 AD), Ghulam Hussain Jaunpuri (1790-1862 AD) and others. The results of civilization of Indian astronomy is clearly visible with the ancient astronomical texts, the concept of the universe, the Hindu calendar, observatory, zij (astronomical tables), and astronomical tools such as gnomon, Yasti Yantra, Ghati Yantra, astrolabe, and others.
PERHITUNGAN DATA EPHEMERIS KOORDINAT MATAHARI MENGGUNAKAN ALGORITMA JEAN MEEUS HIGHER ACCURACY DAN KETERKAITANNYA DENGAN PENGEMBANGAN ILMU FALAK reza akbar
Islam Futura Vol 16, No 2 (2017): Jurnal Ilmiah Islam Futura
Publisher : Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/jiif.v16i2.1509

Abstract

Data of solar coordinate such as longitude and latitude of the ecliptic, declination, and right ascension are the data that are often involved in astronomical reckoning and practical islamic astronomy. These data are often found in ephemeris tables such as the ephemeris of Hisab Rukyat by Ministry of Religious Affairs of the Republic of Indonesia, Nautica Almanac and others. One of the algorithms used in the preparation of ephemeris data tables is the Jean Meeus Higher Accuracy algorithm. Calculation of ephemeris data of solar coordinates using these algorithms starts with counting Julian Day (JD) and Julian Day Ephemeris (JDE). By using advanced algorithms based on VSOP87 theory, we can then calculate the longitude and latitude of the solar ecliptic, the distance of the earth to the Sun, the true obliquity (angle between the celestial equator and the ecliptic), the right ascension and declination, the equation of time and the Sun's semi diameter. The calculation of the solar coordinate in this paper is for June 7, 2017 at 19.00 WIB or 12.00 GMT. The results will then be compared with the data of solar coordinate in Ephemeris Hisab Rukyat 2017 at the same time.
Co-Authors Ahmad Izzuddin