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A Few Common Misconceptions in Historical Astronomy by Barry D
A Few Common Misconceptions in Historical Astronomy By Barry D. Malpas – Special to the Williams-Grand Canyon News – 2014 September Did Galileo Invent the Telescope? Credit for the invention of the telescope is given to the Dutch lens maker Johann Lippershey (ca. 1570- 1619) in the year 1608, who tried to market them as military devices to the Dutch Government. Galileo, hearing about the invention through his correspondences with other scientists in Europe, built his first telescope in one evening, during the fall of 1609. Galileo too recognized the military significance of the telescope, but he also compre- hended its scientific importance, applying it to the Moon and planets, hence expanding humankind's understanding of the Universe. This use advanced astronomy as a modern science and provided its most important research instrument. Has Polaris Always Been the North Star? As the Earth spins on its axis like a giant top, it also slowly wobbles like one, completing one cycle in a period of about 26,000 years. This circular wobble is known as Precession, and is the movement of the direction in the sky to where the Earth’s axis points. At present, it points very close to the star Polaris. However, 5,000 years ago when Stonehenge in England and the Great Pyramid at Giza, Egypt, were being constructed, the Earth’s north polar axis pointed to Thuban, a star in the constellation Draco. About 12,000 years from now the axis will circle its way around towards the bright star Vega, in the constellation Lyra. (Note both Thuban and Vega on the sky chart.) Was the Earth Considered Flat When Columbus Discovered the New World? This misconception was generally true for the unschooled masses, but not so for anyone who had received an education. -
Modernism and the Issue of Periodization
CLCWeb: Comparative Literature and Culture ISSN 1481-4374 Purdue University Press ©Purdue University Volume 7 (2005) Issue 1 Article 3 Modernism and the Issue of Periodization Leonard Orr Washington State University Follow this and additional works at: https://docs.lib.purdue.edu/clcweb Part of the Comparative Literature Commons, and the Critical and Cultural Studies Commons Dedicated to the dissemination of scholarly and professional information, Purdue University Press selects, develops, and distributes quality resources in several key subject areas for which its parent university is famous, including business, technology, health, veterinary medicine, and other selected disciplines in the humanities and sciences. CLCWeb: Comparative Literature and Culture, the peer-reviewed, full-text, and open-access learned journal in the humanities and social sciences, publishes new scholarship following tenets of the discipline of comparative literature and the field of cultural studies designated as "comparative cultural studies." Publications in the journal are indexed in the Annual Bibliography of English Language and Literature (Chadwyck-Healey), the Arts and Humanities Citation Index (Thomson Reuters ISI), the Humanities Index (Wilson), Humanities International Complete (EBSCO), the International Bibliography of the Modern Language Association of America, and Scopus (Elsevier). The journal is affiliated with the Purdue University Press monograph series of Books in Comparative Cultural Studies. Contact: <[email protected]> Recommended Citation Orr, Leonard. "Modernism and the Issue of Periodization." CLCWeb: Comparative Literature and Culture 7.1 (2005): <https://doi.org/10.7771/1481-4374.1254> This text has been double-blind peer reviewed by 2+1 experts in the field. The above text, published by Purdue University Press ©Purdue University, has been downloaded 6557 times as of 11/ 07/19. -
The Mathematics of the Chinese, Indian, Islamic and Gregorian Calendars
Heavenly Mathematics: The Mathematics of the Chinese, Indian, Islamic and Gregorian Calendars Helmer Aslaksen Department of Mathematics National University of Singapore [email protected] www.math.nus.edu.sg/aslaksen/ www.chinesecalendar.net 1 Public Holidays There are 11 public holidays in Singapore. Three of them are secular. 1. New Year’s Day 2. Labour Day 3. National Day The remaining eight cultural, racial or reli- gious holidays consist of two Chinese, two Muslim, two Indian and two Christian. 2 Cultural, Racial or Religious Holidays 1. Chinese New Year and day after 2. Good Friday 3. Vesak Day 4. Deepavali 5. Christmas Day 6. Hari Raya Puasa 7. Hari Raya Haji Listed in order, except for the Muslim hol- idays, which can occur anytime during the year. Christmas Day falls on a fixed date, but all the others move. 3 A Quick Course in Astronomy The Earth revolves counterclockwise around the Sun in an elliptical orbit. The Earth ro- tates counterclockwise around an axis that is tilted 23.5 degrees. March equinox June December solstice solstice September equinox E E N S N S W W June equi Dec June equi Dec sol sol sol sol Beijing Singapore In the northern hemisphere, the day will be longest at the June solstice and shortest at the December solstice. At the two equinoxes day and night will be equally long. The equi- noxes and solstices are called the seasonal markers. 4 The Year The tropical year (or solar year) is the time from one March equinox to the next. The mean value is 365.2422 days. -
Ocean Data Standards
Manuals and Guides 54 Ocean Data Standards Volume 2 Recommendation to Adopt ISO 8601:2004 as the Standard for the Representation of Date and Time in Oceanographic Data Exchange UNESCO Manuals and Guides 54 Ocean Data Standards Volume 2 Recommendation to Adopt ISO 8601:2004 as the Standard for the Representation of Date and Time in Oceanographic Data Exchange UNESCO 2011 IOC Manuals and Guides, 54, Volume 2 Version 1 January 2011 For bibliographic purposes this document should be cited as follows: Paris. Intergovernmental Oceanographic Commission of UNESCO. 2011.Ocean Data Standards, Vol.2: Recommendation to adopt ISO 8601:2004 as the standard for the representation of dates and times in oceanographic data exchange.(IOC Manuals and Guides, 54, Vol. 2.) 17 pp. (English.)(IOC/2011/MG/54-2) © UNESCO 2011 Printed in France IOC Manuals and Guides No. 54 (2) Page (i) TABLE OF CONTENTS page 1. BACKGROUND ......................................................................................................................... 1 2. DATE AND TIME FOR DATA EXCHANGE ......................................................................... 1 3. INTERNATIONAL STANDARD ISO 8601:2004 .............................................................. 1 4. DATE AND TIME REPRESENTATION................................................................................ 2 4.1 Date ................................................................................................................................................. 2 4.2 Time ............................................................................................................................................... -
Islamic Calendar from Wikipedia, the Free Encyclopedia
Islamic calendar From Wikipedia, the free encyclopedia -at اﻟﺘﻘﻮﻳﻢ اﻟﻬﺠﺮي :The Islamic, Muslim, or Hijri calendar (Arabic taqwīm al-hijrī) is a lunar calendar consisting of 12 months in a year of 354 or 355 days. It is used (often alongside the Gregorian calendar) to date events in many Muslim countries. It is also used by Muslims to determine the proper days of Islamic holidays and rituals, such as the annual period of fasting and the proper time for the pilgrimage to Mecca. The Islamic calendar employs the Hijri era whose epoch was Islamic Calendar stamp issued at King retrospectively established as the Islamic New Year of AD 622. During Khaled airport (10 Rajab 1428 / 24 July that year, Muhammad and his followers migrated from Mecca to 2007) Yathrib (now Medina) and established the first Muslim community (ummah), an event commemorated as the Hijra. In the West, dates in this era are usually denoted AH (Latin: Anno Hegirae, "in the year of the Hijra") in parallel with the Christian (AD) and Jewish eras (AM). In Muslim countries, it is also sometimes denoted as H[1] from its Arabic form ( [In English, years prior to the Hijra are reckoned as BH ("Before the Hijra").[2 .(ﻫـ abbreviated , َﺳﻨﺔ ﻫِ ْﺠﺮﻳّﺔ The current Islamic year is 1438 AH. In the Gregorian calendar, 1438 AH runs from approximately 3 October 2016 to 21 September 2017.[3] Contents 1 Months 1.1 Length of months 2 Days of the week 3 History 3.1 Pre-Islamic calendar 3.2 Prohibiting Nasī’ 4 Year numbering 5 Astronomical considerations 6 Theological considerations 7 Astronomical -
How Long Is a Year.Pdf
How Long Is A Year? Dr. Bryan Mendez Space Sciences Laboratory UC Berkeley Keeping Time The basic unit of time is a Day. Different starting points: • Sunrise, • Noon, • Sunset, • Midnight tied to the Sun’s motion. Universal Time uses midnight as the starting point of a day. Length: sunrise to sunrise, sunset to sunset? Day Noon to noon – The seasonal motion of the Sun changes its rise and set times, so sunrise to sunrise would be a variable measure. Noon to noon is far more constant. Noon: time of the Sun’s transit of the meridian Stellarium View and measure a day Day Aday is caused by Earth’s motion: spinning on an axis and orbiting around the Sun. Earth’s spin is very regular (daily variations on the order of a few milliseconds, due to internal rearrangement of Earth’s mass and external gravitational forces primarily from the Moon and Sun). Synodic Day Noon to noon = synodic or solar day (point 1 to 3). This is not the time for one complete spin of Earth (1 to 2). Because Earth also orbits at the same time as it is spinning, it takes a little extra time for the Sun to come back to noon after one complete spin. Because the orbit is elliptical, when Earth is closest to the Sun it is moving faster, and it takes longer to bring the Sun back around to noon. When Earth is farther it moves slower and it takes less time to rotate the Sun back to noon. Mean Solar Day is an average of the amount time it takes to go from noon to noon throughout an orbit = 24 Hours Real solar day varies by up to 30 seconds depending on the time of year. -
Some Reflections on the Periodization of Tibetan History*
Some Reflections on the Periodization of Tibetan History* Bryan J. Cuevas (Florida State University, USA) istory is always expressed as a narrative, a story about the past. To Hwrite a story out of the events of the past, historians must give those events a coherent meaning and plot those meaningful events as chapters in a larger narrative. This means that the method of writing history is not simply the recording of a series of past events, or a set of dates. Such a record would not be a history but a mere chronology, and history is never just a chronicle of dates. Historiography, the study of history and the methods employed in how individuals, or a community of people, or a culture come to understand the past and articulate that understanding, presupposes that history by necessity, whether we prefer this or not, is always written in chapters. Periodization — the breaking-up of the past into chapters, or “periods” — is one necessary way historians make sense of the past and also write history. The question of periodization, however, is one of those topics in historiography that generates fierce debates and can create, and certainly has created, much controversy. The problem of periodization is precisely this problem of how best to characterize and interpret the chapters in a coherent story of the past. As many insightful historians have warned over the years, the articulation of historical periods may indeed be arbitrary and artificial, but rarely is such articulation a neutral, unambiguous, and value- free enterprise. Having heeded this warning, I choose in this brief essay — perhaps unwisely — to charge headlong into this academic mine-field where success is not only risky, but far from guaranteed. -
Overview of Periodization Methods for Resistance Training
Overview of Periodization Methods for Resistance Training By Mladen Jovanović ([email protected]) Belgrade, 26. April 2006. www.powerdevelopmentinc.com 1. Introduction The reason for writing this article is to put my current knowledge regarding periodization in some systematisized form, thus allowing more deeper discussion and as a result more knowldege in mine, and yours, coaching toolbox. The purpose of this article is not to attach „good“ or „bad“ atributes to some forms of periodization, but rather to critically analyse them, their pros and cons, thus allowing an easyer choice/decisions for S&C coach implementing and combining them in some specific situations for specific athletes. This article is not going in discussion „what is periodization or strength“ and simmilar stuff, but it is going to be more general in its nature. Also, it is written for coaches with advanced knowledge regarding resistance training and periodization, altought I will try to make it readable and fun. 2. Before we start For the sole purpose of this article I will define four goals resistance training should cover: 1. Structural and strength endurance (15-20 RM) 2. Hypertrophy goals (5-15 RM) 3. Max strength (1-5 RM) 4. Power/Explosivness or Dynamic Effort (50-70% 1RM & Olys) Let me remind you that this classification is higly debatable and it is used only for easier explanation of different periodization methods, so please do not bother me or yourself with it, just accept it how it is and direct your attention to the periodization methods described. Thanks. 3. Many coaches, many methods Basically, what you are going to read here are „pure“ forms of periodizaion methods, a situation which is not happening so often in „real life“. -
Quaker Calendar Guide
The Quaker calendar Research guide In the past Quakers often dated their documents in ways that are unfamiliar to us now. This guide will help you to understand what the dates used on historical Quaker documents mean in today's language. The English year before and after 31 December 1751 Up to and including 1751 the Julian calendar was used in England, Wales, Ireland and the British colonies overseas. In these places the year officially began on 25 March (Lady Day) and ended on the following 24 March. So 24 March 1750 was followed the next day by 25 March 1751. In Scotland the Gregorian calendar had been in use since 1600, with a year that began on 1 January. In 1751 the British Parliament passed the Calendar (New Style) Act 1750, also known as ‘Chesterfield’s Act’ after the 4th Earl of Chesterfield (24 Geo II c.23). It laid down that from 1752 the English year would begin on 1 January. Thus the year 1751 began on 25 March and ended on 31 December, followed immediately by 1 January 1752. There is a further difference (related to leap years) between the Julian and Gregorian calendars, which meant that by 1752 the Julian calendar was twelve days behind the Gregorian one. Chesterfield's Act had therefore laid down that, in 1752, 2 September should be followed by 14 September (for a fuller account, see Cheney, CR (ed) (1948) Handbook of Dates for Students of English History. London: Royal Historical Society [Ref. Shelves]). Quaker usage Quakers followed the national practice, with one exception. -
The New Global History Toward a Narrative for Pangaea Two
EWE (previously EuS) 14(2003)1 Main Article / Hauptartikel 75 The New Global History Toward a Narrative for Pangaea Two Wolf Schäfer Summary: The author approaches contemporary history from a position that defines the expression “truly global” as earth-centered. On this ground, two kinds of global history can be distinguished: the non-linear geophysical history of first nature, which is alternately uniting and dividing the world-continent (called Pangaea One), and the revolutionary technoscientific history of second nature, which is beginning to defragment the earth with things like the World Wide Web. The new Global History explores contemporary global history in general and the emerging civilizational unity (called Pangaea Two) in particular. The new historiographical approach is introduced via a critical discussion of Globality, Globalization, Periodization, World History, and Methodology. Zusammenfassung: Der Autor nähert sich der Gegenwartsgeschichte von einer Position, die den Ausdruck “wahrhaft global” als erdzentriert definiert. Auf dieser Basis können zwei Arten von Globalgeschichte unterschieden werden: die nicht-lineare geophysikalische Geschichte der ersten Natur, die den Weltkontinent abwechselnd zusammenfügt und fragmentiert (Pangaea Eins genannt), und die revolutionäre technowissenschaftliche Geschichte der zweiten Natur, die angefangen hat die Erde mit Dingen wie dem World Wide Web zu defragmentieren. Die neue Globalgeschichte erforscht die globale Gegenwartsgeschichte im allgemeinen und die sich anbahnende zivilisatorische Einheit (Pangaea Zwei genannt) im besonderen. Der neue historiographische Ansatz wird anhand einer kritischen Diskussion von Globalität, Globalisierung, Periodisierung, Weltgeschichte und Methodologie vorgestellt. Overview ((3)) In this article, I shall be following an alternative tack to- ward global history. I think that the designation “new global history” is warranted by the novelty of a human-made global ((1)) Titles of the form “The New –” invite the tested response: history. -
Periodization
Preprint of ISKO Encyclopedia of Knowledge Organization article at https://www.isko.org/cyclo/periodization. Periodization Ryan Shaw Table of contents 1. Introduction 2. The emergence of a scholarly discourse on periodization 3. Diversifying criteria for individuating periods 4. Periodization as a form of historiographical theorizing 5. Institutionalization of periodizations 6. Arguments against periodization 7. Periodization in KOS 8. Conclusion Endnotes References Abstract This article first focuses on the emergence of a scholarly discourse on periodization. That discourse includes historians' efforts to diversify criteria for individuating periods, and philosophers' analyses of periodization as a form of historiographical theorizing. Next the article turns to the dynamic interaction between scholarly periodization and the broader institutionalization of periodizations. This is followed by a brief review of arguments against periodization. The article ends with a look at how periodizations are treated in knowledge organization systems (KOS). 1. Introduction Periodization is the division of time in order to describe it. The historian Marc Bloch (1953, 28) observed that because time is both a continuum and a process of perpetual change, any description of time must emphasize continuity at some points and difference at others. It is these emphases of continuity and difference that respectively develop into periods and the boundaries between them. A period groups together points in time under a unifying concept or continuous process, and it highlights differences between these points and those not included in the period. Periodization is a form of classification: it is the process of distinguishing and distributing time into different phases. Much of the scholarly discourse on periodization focuses on the periodization of human history. -
International Standard Iso 8601-1:2019(E)
This preview is downloaded from www.sis.se. Buy the entire standard via https://www.sis.se/std-80010314 INTERNATIONAL ISO STANDARD 8601-1 First edition 2019-02 Date and time — Representations for information interchange — Part 1: Basic rules Date et heure — Représentations pour l'échange d'information — Partie 1: Règles de base Reference number ISO 8601-1:2019(E) © ISO 2019 This preview is downloaded from www.sis.se. Buy the entire standard via https://www.sis.se/std-80010314 ISO 8601-1:2019(E) COPYRIGHT PROTECTED DOCUMENT © ISO 2019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address belowCP 401or ISO’s • Ch. member de Blandonnet body in 8 the country of the requester. ISO copyright office Phone: +41 22 749 01 11 CH-1214 Vernier, Geneva Fax:Website: +41 22www.iso.org 749 09 47 PublishedEmail: [email protected] Switzerland ii © ISO 2019 – All rights reserved This preview is downloaded from www.sis.se. Buy the entire standard via https://www.sis.se/std-80010314 ISO 8601-1:2019(E) Contents Page Foreword ..........................................................................................................................................................................................................................................v