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Astronomy and Cosmology
Astronomy and Astrophysics
History of RA [why is the vernal equinox used?]
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[QUOTE="jim mcnamara, post: 5907816, member: 35824"] Okay. History. The new year on the Roman calendar started on March 15 - the Ides of March. The Sun was just coming into Aries. [USER=199289]@sophiecentaur[/USER] explaining navigation actually gave the answer. Aries is the starting point for the zodiac. Instead of me blabbing: http://www.schooloftheseasons.com/spring.html The more modern Julian calendar (the forerunner of our Gregorian calendar) was later changed primarily by Dionysius exiguus, and the New year moved in 525 AD to January 1. Dionysius actually changed the year numbers, and estimated the birth of Christ and the start of the calendar. 500+ years late. The first year in the new improved calendar was 525 AD. He "invented" Anno Domini. Short answer: it is all made up stuff, except for the actual equinoxes/solstices. [/QUOTE]
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History of RA [why is the vernal equinox used?]
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