Khandakhadyaka

Khaṇḍakhādyaka (meaning "edible bite; morsel of food") is an astronomical treatise written by Indian mathematician and astronomer Brahmagupta in 665 AD.^[1] The treatise contains eight chapters covering such topics as the longitudes of the planets, diurnal rotation, lunar and solar eclipses, risings and settings, the moon's crescent and conjunctions of the planets. The treatise also includes an appendix which in some versions has only one chapter, and in other has three.

The treatise was written as a response to Aryabhata's Ardharatrikapaksa.^[1] Khandakhadyaka was known in Sanskrit to al-Biruni.^[1]

References[]

^ ^a ^b ^c Thomas F. Glick; Steven Livesey; Faith Wallis, eds. (2014). Medieval Science, Technology, and Medicine: An Encyclopedia. Routledge. p. 464. ISBN 1135459398.

v t Indian astronomy
Astronomers	Apastamba Aryabhata I Aryabhata II Vainu Bappu Bhāskara I Bhāskara II Baudhayana Brahmagupta Sandip Chakrabarti Radhagobinda Chandra Subrahmanyan Chandrasekhar Amil Kumar Das P. Devadas Gautama Siddha M. K. Das Gupta Jyesthadeva Kamalakara Katyayana Lagadha Lalla Madhava of Sangamagrama Prasanta Chandra Mahalanobis Mahavira Manava Jayant Narlikar Parameshvara Achyuta Pisharati Venkatraman Radhakrishnan J. J. Rawal Megh Nad Saha Jagannatha Samrat Bapudeva Sastri Jai Singh II of Amber Nilakantha Somayaji Sripati Mahendra Suri Govind Swarup Utpala Varahamihira Shankara Variyar Vasistha Yajnavalkya Pathani Samanta
Works	Aryabhatiya Brahmanas Aitareya Brahmana Shatapatha Brahmana Bṛhat Saṃhitā Shulba Sutras Panchangam Khandakhadyaka Siddhantas Brahmasphutasiddhanta Maha-Siddhanta Pancha-Siddhantika Paulisa Siddhanta Paitamaha Siddhanta Romaka Siddhanta Surya Siddhanta Vasishtha Siddhanta Tantrasangraha Jyotirmimamsa Treatise on Astrology of the Kaiyuan Era Vedanga Jyotisha Vedas Atharvaveda Rigveda Yavanajataka Zij
Instruments	Armillary sphere Astrolabe Celestial globe Compass Cross-staff Dioptra Equatorial ring Equatorial sundial Globe Gnomon Mural instrument Quadrant Sextant Sundial Triquetrum Water clock
Concepts	Axial tilt Azimuth Cardinal direction Celestial equator Celestial sphere Celestial spheres Center of mass Circular orbit Deferent and epicycle Earth's rotation Eccentricity Ecliptic Elliptic orbit Equant Geocentrism Geoheliocentrism Globe Gravity Heliocentrism Hindu units of time Jyotiṣa Kalpa Moonlight Nakshatra Parallax Precession Ritu Spherical Earth Sunlight Tithi Yuga Zodiacal sign Manvantara
Centers	Jantar Mantar Jaipur New Delhi Ujjain Varanasi Kerala school of astronomy and mathematics
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Months of the Vedic calendar	Chaitra Vaisakha Jyeshta Aashaadha Shraavana Bhadrapada Ashvin Kartik Margashirsha Pausha Maagha Phalguna