Constelation

Constelation

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  CONSTELLATION  SUBMMITTED BY:MARIELGITGANO SUBMMITTED TO:MR.JOEMA SANCHEZ
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  In modern astronomy,a constellation is a specific area of the celestial sphere as defined by the International Astronomical Union (IAU). These areas mostly had their origins in Western-traditional asterisms from which the constellations take their names. There are 88 officially recognized constellations, covering the entire sky.[1] Thus, any given point in a celestial coordinate system can unambiguously be assigned to a constellation. It is usual in astronomy to give the constellation in which a given object is found along with its coordinates in order to convey a rough idea in which part of the sky it is located. ^^CONSTELLATION^^
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  An asterism isa pattern of stars recognized in the Earth's night sky and may be part of an official constellation. It may also be composed of stars from more than one constellation. The stars of the main asterism within a constellation are usually given Greek letters in their order of brightness, the so-called Bayer designation introduced by Johann Bayer in 1603. A total of 1,564 stars are so identified, out of approximately 10,000 stars visible to the naked eye.[41 ASTERISM
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  The Great Rift,a series of dark patches in the Milky Way, is more visible and striking in the southern hemisphere than in the northern. It vividly stands out when conditions are otherwise so dark that the Milky Way's central region casts shadows on the ground.[44] Some cultures have discerned shapes in these patches and have given names to these "dark cloud constellations." Members of the Inca civilization identified various dark areas or dark nebulae in the Milky Way as animals, and associated their appearance with the seasonal rains.[45] Australian Aboriginal astronomy also describes dark cloud constellations, the most famous being the "emu in the sky" whose head is formed by the Coalsack DARK CLOUD
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  Some of theearliest roots of Indian astronomy can be dated to the period of Indus Valley Civilization, a Bronze Age civilisation in the northwest Indian subcontinent. Afterwards the astronomy developed as a discipline of Vedanga or one of the "auxiliary disciplines" associated with the study of the Vedas,[16] dating 1500 BC or older.The oldest known text is the Vedanga Jyotisha, dated to 1400– 1200 BC[17] As with other traditions, the original application of astronomy was thus religious. Indian astronomy was influenced by Greek astronomy beginning in the 4th century BC and through the early centuries of the Common Era, for example by the Yavanajataka and the Romaka Siddhanta, a Sanskrit translation of a Greek text disseminated from the 2nd century.[18] Indian astronomy flowered in the 5th–6th century, with Aryabhata, whose Aryabhatiya represented the pinnacle of astronomical knowledge at the time. Later the Indian astronomy significantly influenced medieval Islamic, Chinese and European astronomy.[1 INDIAN ASTRONOMY
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  Slideshow By:Mariel Gitgano