Religious Ephemeris
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Ephemeris Time, D. H. Sadler, Occasional
EPHEMERIS TIME D. H. Sadler 1. Introduction. – At the eighth General Assembly of the International Astronomical Union, held in Rome in 1952 September, the following resolution was adopted: “It is recommended that, in all cases where the mean solar second is unsatisfactory as a unit of time by reason of its variability, the unit adopted should be the sidereal year at 1900.0; that the time reckoned in these units be designated “Ephemeris Time”; that the change of mean solar time to ephemeris time be accomplished by the following correction: ΔT = +24°.349 + 72s.318T + 29s.950T2 +1.82144 · B where T is reckoned in Julian centuries from 1900 January 0 Greenwich Mean Noon and B has the meaning given by Spencer Jones in Monthly Notices R.A.S., Vol. 99, 541, 1939; and that the above formula define also the second. No change is contemplated or recommended in the measure of Universal Time, nor in its definition.” The ultimate purpose of this article is to explain, in simple terms, the effect that the adoption of this resolution will have on spherical and dynamical astronomy and, in particular, on the ephemerides in the Nautical Almanac. It should be noted that, in accordance with another I.A.U. resolution, Ephemeris Time (E.T.) will not be introduced into the national ephemerides until 1960. Universal Time (U.T.), previously termed Greenwich Mean Time (G.M.T.), depends both on the rotation of the Earth on its axis and on the revolution of the Earth in its orbit round the Sun. There is now no doubt as to the variability, both short-term and long-term, of the rate of rotation of the Earth; U.T. -
THE BOOK ONLY (F)> CO OU1 68061 Co
TEXT FLY WITHIN THE BOOK ONLY (f)> CO OU1 68061 co ,OSMANIA UNIVERSITY LIBRARY / Q JL Accession No. Call No. tf airrfl-V/ G S" ^ U & 6 0^ 1 Author Title This book should be returned on or before the date last marked below. GOETHE Selections by Ludwig Curtius Translated and edited, with an Introduction, by Hermann J. Weigand ROUTLEDGE & KEGAN PAUL LTD First Edition in England 1949 <b- Paul Ltd. Copyright 1949 by Routledgc Kegan Broadway House- 68-74 Carter Lane, London, E, C. 4 Printed in U.S.A. Introduction 7 b\j Hermann ]. Wcigand Editor's Note 38 RELIGION 43 Religion in General 45 Christianity 49 Protestantism - Catholicism 55 Old and New Testament 64 Superstition 67 Faith 70 God and Nature 73 God and the World 77 God and Man 79 NATURE 85 The Creative Process 87 The Incommensurable 92 Idea and Experience 95 Genius 97 The Daemonic 98 Imagination 102 The Aging Process 104 Youth 108 Happiness 109 CONTENTS SCIENCE AND PHILOSOPHY 113 Theory 115 Subject - Object 123 Truth 125 Antinomies 128 Relativism 131 Life 134 Spirit 137 Immortality - Entelechy 139 Man and History 145 THE SOCIAL SPHERE 149 Bildung 151 Humanity 156 Man Among Men 159 Man and the World 163 Man and Fate 166 Man and Society 167 The Individual arid the Public 170 Knowledge of Human Nature 172 - Spiritual Community Friendship 172 Critique of the Times 174 THE MORAL SPHERE 181 Freedom 183 Conscience 184 Law and Order 185 Authority 185 Faults - Virtues 187 Humility - Reverence - Mystery 189 - - Character Personality Individuality 190 Education 195 Love 197 CONTENTS Marriage 200 -
Calculation of Moon Phases and 24 Solar Terms
Calculation of Moon Phases and 24 Solar Terms Yuk Tung Liu (廖²棟) First draft: 2018-10-24, Last major revision: 2021-06-12 Chinese Versions: ³³³qqq---文文文 简简简SSS---文文文 This document explains the method used to compute the times of the moon phases and 24 solar terms. These times are important in the calculation of the Chinese calendar. See this page for an introduction to the 24 solar terms, and this page for an introduction to the Chinese calendar calculation. Computation of accurate times of moon phases and 24 solar terms is complicated, but today all the necessary resources are freely available. Anyone familiar with numerical computation and computer programming can follow the procedure outlined in this document to do the computation. Before stating the procedure, it is useful to have a basic understanding of the basic concepts behind the computation. I assume that readers are already familiar with the important astronomy concepts mentioned on this page. In Section 1, I briefly introduce the barycentric dynamical time (TDB) used in modern ephemerides, and its connection to terrestrial time (TT) and international atomic time (TAI). Readers who are not familiar with general relativity do not have to pay much attention to the formulas there. Section 2 introduces the various coordinate systems used in modern astronomy. Section 3 lists the formulas for computing the IAU 2006/2000A precession and nutation matrices. One important component in the computation of accurate times of moon phases and 24 solar terms is an accurate ephemeris of the Sun and Moon. I use the ephemerides developed by the Jet Propulsion Laboratory (JPL) for the computation. -
Ordinary Jerusalem 1840–1940
Ordinary Jerusalem 1840–1940 Angelos Dalachanis and Vincent Lemire - 978-90-04-37574-1 Downloaded from Brill.com03/21/2019 10:36:34AM via free access Open Jerusalem Edited by Vincent Lemire (Paris-Est Marne-la-Vallée University) and Angelos Dalachanis (French School at Athens) VOLUME 1 The titles published in this series are listed at brill.com/opje Angelos Dalachanis and Vincent Lemire - 978-90-04-37574-1 Downloaded from Brill.com03/21/2019 10:36:34AM via free access Ordinary Jerusalem 1840–1940 Opening New Archives, Revisiting a Global City Edited by Angelos Dalachanis and Vincent Lemire LEIDEN | BOSTON Angelos Dalachanis and Vincent Lemire - 978-90-04-37574-1 Downloaded from Brill.com03/21/2019 10:36:34AM via free access This is an open access title distributed under the terms of the prevailing CC-BY-NC-ND License at the time of publication, which permits any non-commercial use, distribution, and reproduction in any medium, provided no alterations are made and the original author(s) and source are credited. The Open Jerusalem project has received funding from the European Research Council (ERC) under the European Union’s Seventh Framework Programme (FP7/2007-2013) (starting grant No 337895) Note for the cover image: Photograph of two women making Palestinian point lace seated outdoors on a balcony, with the Old City of Jerusalem in the background. American Colony School of Handicrafts, Jerusalem, Palestine, ca. 1930. G. Eric and Edith Matson Photograph Collection, Library of Congress. https://www.loc.gov/item/mamcol.054/ Library of Congress Cataloging-in-Publication Data Names: Dalachanis, Angelos, editor. -
The Calendars of India
The Calendars of India By Vinod K. Mishra, Ph.D. 1 Preface. 4 1. Introduction 5 2. Basic Astronomy behind the Calendars 8 2.1 Different Kinds of Days 8 2.2 Different Kinds of Months 9 2.2.1 Synodic Month 9 2.2.2 Sidereal Month 11 2.2.3 Anomalistic Month 12 2.2.4 Draconic Month 13 2.2.5 Tropical Month 15 2.2.6 Other Lunar Periodicities 15 2.3 Different Kinds of Years 16 2.3.1 Lunar Year 17 2.3.2 Tropical Year 18 2.3.3 Siderial Year 19 2.3.4 Anomalistic Year 19 2.4 Precession of Equinoxes 19 2.5 Nutation 21 2.6 Planetary Motions 22 3. Types of Calendars 22 3.1 Lunar Calendar: Structure 23 3.2 Lunar Calendar: Example 24 3.3 Solar Calendar: Structure 26 3.4 Solar Calendar: Examples 27 3.4.1 Julian Calendar 27 3.4.2 Gregorian Calendar 28 3.4.3 Pre-Islamic Egyptian Calendar 30 3.4.4 Iranian Calendar 31 3.5 Lunisolar calendars: Structure 32 3.5.1 Method of Cycles 32 3.5.2 Improvements over Metonic Cycle 34 3.5.3 A Mathematical Model for Intercalation 34 3.5.3 Intercalation in India 35 3.6 Lunisolar Calendars: Examples 36 3.6.1 Chinese Lunisolar Year 36 3.6.2 Pre-Christian Greek Lunisolar Year 37 3.6.3 Jewish Lunisolar Year 38 3.7 Non-Astronomical Calendars 38 4. Indian Calendars 42 4.1 Traditional (Siderial Solar) 42 4.2 National Reformed (Tropical Solar) 49 4.3 The Nānakshāhī Calendar (Tropical Solar) 51 4.5 Traditional Lunisolar Year 52 4.5 Traditional Lunisolar Year (vaisnava) 58 5. -
Astronomical Time Keeping file:///Media/TOSHIBA/Times.Htm
Astronomical Time Keeping file:///media/TOSHIBA/times.htm Astronomical Time Keeping Introduction Siderial Time Solar Time Universal Time (UT), Greenwich Time Timezones Atomic Time Ephemeris Time, Dynamical Time Scales (TDT, TDB) Julian Day Numbers Astronomical Calendars References Introduction: Time keeping and construction of calendars are among the oldest branches of astronomy. Up until very recently, no earth-bound method of time keeping could match the accuracy of time determinations derived from observations of the sun and the planets. All the time units that appear natural to man are caused by astronomical phenomena: The year by Earth's orbit around the Sun and the resulting run of the seasons, the month by the Moon's movement around the Earth and the change of the Moon phases, the day by Earth's rotation and the succession of brightness and darkness. If high precision is required, however, the definition of time units appears to be problematic. Firstly, ambiguities arise for instance in the exact definition of a rotation or revolution. Secondly, some of the basic astronomical processes turn out to be uneven and irregular. A problem known for thousands of years is the non-commensurability of year, month, and day. Neither can the year be precisely expressed as an integer number of months or days, nor does a month contain an integer number of days. To solves these problems, a multitude of time scales and calenders were devised of which the most important will be described below. Siderial Time The siderial time is deduced from the revolution of the Earth with respect to the distant stars and can therefore be determined from nightly observations of the starry sky. -
Swiss Ephemeris: an Accurate Ephemeris Toolset for Astronomy and Astrology
NOTICES Swiss Ephemeris: An Accurate Ephemeris Toolset for Astronomy and Astrology Victor Reijs Independent scholar [email protected] Ralf Stubner Independent scholar [email protected] Introduction The Swiss Ephemeris is a highly accurate ephemeris toolset developed since 1997 by Astrodienst (Koch and Triendl 2004). It is based upon the DE430/DE431 ephemerides from NASA’s JPL (Folkner et al. 2014) and covers the time range 13,000 BC to AD 17,000. For both astronomical and astrological coordinates (true equinox of date), all corrections such as relativistic aberration, deflection of light in the gravity field of the Sun and others have been included. The Swiss Ephemeris is not a product that can be easily used by end users, but it is an accurate and fast toolset for programmers to build into their own astronomical or astrological software. A few examples where this toolset is used include the swephR package for the R environment (Stubner and Reijs 2019) and ARCHAEOCOSMO, which is used within both Excel and R (Reijs 2006). All discussed packages have open source versions. To provide flexibility (mainly in processing and memory needs), Swiss Ephemeris can use three ephemerides, giving the user the choice of which to use. First there are the original JPL ephemerides data files. These data files need a lot of memory (around 3 GB) and provide the most accurate ephemeris at this moment. The second (and default) SE ephemeris uses Astrodienst’s data files. Astrodienst used sophisticated compres- sion techniques to reduce the original DE430/DE431 data files to around 100 MB. -
San Jose Astronomical Association Membership Form P.O
SJAA EPHEMERIS SJAA Activities Calendar May General Meeting Jim Van Nuland Dr. Jeffrey Cuzzi May 26 at 8 p.m. @ Houge Park late April David Smith 20 Houge Park Astro Day. Sunset 7:47 p.m., 20% moon sets 0:20 a.m. Star party hours: 8:30 to 11:30 p.m. At our May 26 General Meeting the title of the talk will be: 21 Mirror-making workshop at Houge Park. 7:30 p.m. What Have We Learned from the Cassini/Huygens Mission to 28 General meeting at Houge Park. Karrie Gilbert will Saturn? – a presentation by Dr. Jeffrey Cuzzi of NASA Ames speak on Studies of Andromeda Galaxy Halo Stars. 8 Research Center. p.m. May Cassini is now well into its third year at Saturn. The Huygens 5 Mirror-making workshop at Houge Park. 7:30 p.m. entry probe landed on Titan in January 2005, but since then, 11 Astronomy Class at Houge Park. 7:30 p.m. many new discoveries have been made on Titan’s surface, and 11 Houge Park star party. Sunset 8:06 p.m., 27% moon elsewhere in the system, by the orbiter as it continues its four- rise 3:23 a.m. Star party hours: 9:00 to midnight. year tour. In addition, new understanding is emerging from 12 Dark sky weekend. Sunset 8:07 p.m., 17% moon rise analysis of the earliest obtained data. 3:50 a.m. In this talk, Dr. Jeffrey Cuzzi will review the key science highlights 17 Mirror-making workshop at Houge Park. -
Signal in Space Error and Ephemeris Validity Time Evaluation of Milena and Doresa Galileo Satellites †
sensors Article Signal in Space Error and Ephemeris Validity Time Evaluation of Milena and Doresa Galileo Satellites † Umberto Robustelli * , Guido Benassai and Giovanni Pugliano Department of Engineering, Parthenope University of Naples, 80143 Napoli, Italy; [email protected] (G.B.); [email protected] (G.P.) * Correspondence: [email protected] † This paper is an extended version of our paper published in the 2018 IEEE International Workshop on Metrology for the Sea proceedings entitled “Accuracy evaluation of Doresa and Milena Galileo satellites broadcast ephemeris”. Received: 14 March 2019; Accepted: 11 April 2019; Published: 14 April 2019 Abstract: In August 2016, Milena (E14) and Doresa (E18) satellites started to broadcast ephemeris in navigation message for testing purposes. If these satellites could be used, an improvement in the position accuracy would be achieved. A small error in the ephemeris would impact the accuracy of positioning up to ±2.5 m, thus orbit error must be assessed. The ephemeris quality was evaluated by calculating the SISEorbit (in orbit Signal In Space Error) using six different ephemeris validity time thresholds (14,400 s, 10,800 s, 7200 s, 3600 s, 1800 s, and 900 s). Two different periods of 2018 were analyzed by using IGS products: DOYs 52–71 and DOYs 172–191. For the first period, two different types of ephemeris were used: those received in IGS YEL2 station and the BRDM ones. Milena (E14) and Doresa (E18) satellites show a higher SISEorbit than the others. If validity time is reduced, the SISEorbit RMS of Milena (E14) and Doresa (E18) greatly decreases differently from the other satellites, for which the improvement, although present, is small. -
Understanding the Drivers of Drought in Somalia: Environmental Degradation As a Drought Determinant
Understanding the Drivers of Drought in Somalia: Environmental Degradation as a Drought Determinant Understanding the Drivers of Drought in Somalia: Environmental Degradation as a Drought Determinant Said M-Shidad H. Hussein November 2017 Page 1 Said M-Shidad H. Hussein is the Head of the Centre of Somali Studies at Puntland State University, Garowe, Somalia. He is an advisor to SIDRA The Somali Institute for Development and Research Analysis (SIDRA) Garowe, Puntland State of Somalia Tell: +252-5-846044 Email: [email protected] Website: http://www.sidrainstitute.org This work is licensed under a Creative Commons Attribution Non- Commercial License (CC BY-NC 4.0) Attribute to: Somali Institute for Development & Research Analysis 2017 Page 2 Understanding the Drivers of Drought in Somalia: Environmental Degradation as a Drought Determinant TABLE OF CONTENTS LIST OF ABBREVIATIONS----------------------------------------------------------------------------4 EXECUTIVE SUMMARY------------------------------------------------------------------------------5 KEY FINDING----------------------------------------------------------------------------------------6 KEY RECOMMENDATIONS--------------------------------------------------------------------------7 1. INTRODUCTION-------------------------------------------------------------------------------8 2. METHODOLOGY----------------------------------------------------------------------------12 3. ENVIRONMENTAL DEGRADATION FACTORS AS DRIVERS OF DROUGHT----------------13 3.1 THE PROBLEM OF POPULATION -
Pastoral Food Economy Zone
Pastoralists in Battle with Nature Harshin and Dagahbur East Pastoral Livelihood Zone (Shoats, Camels and Cattle) Gashamo and Aware Districts, Dagahbur Zone, and Harshin District, Jijiga Zone Somali National Regional State, Ethiopia Djibouti Shinile far Somalia A Ri 1.1. Jijiga Degahbur Jijiga Zone a Fik Warder Somalia i m Korahe Gode Oro Ri Ad Afder Aware Liban Gashamo Somalia Degahbur Kenya Degahbour Zone Degahmadow Warder Zone Korahe Zone Fik Zone Deg ahbur Agropastoral (maize, cattle) Past oral FEZ (Lowland pastoral, Camel shoat, and Birka dependent Fik/ Gode pastoral and other pastoral groups (camel, shoats & cattle) An HEA Baseline Study By SC‐UK, DPPB and Partners June, 2005 Sponsored by USAID/OFDA and ECHO, with financial support from SC‐Canada and WFP Assessment Team Name of the participant Position Organization Role Abdi‐fatah Ahmed Ismail SFSS UNDP/DPPB Technical support Omer Abdullahi Hersi SCR UNDP/REB “ “ Bashir S. Abdi‐rahman FSA SC‐UK Team leader Farhan Abdulkadir ZFSO, Fik “ “ Member Abdirahman Mohammed ZFSO, D/bour “ “ Member Abdi‐rashid Salah Somane ZFSO, Afder “ “ Member Abdul‐Ilah Ugas Mohummed ZFSO, Korahe “ “ Member Hassen Mohammed EWE DPPB Member Abdi‐risak S. Abdi‐rahman “ “ “ “ Member Kafi Mohamed Garuf EWE “ “ Member Abdi‐rashid Mohammed EWTL “ “ Member Isse “ “ Member Ali UNISOID Member LZ 17 Harshin‐Dagahbour East Pastoral i Table of Contents Assessment Team............................................................................................................................i Table of Contents............................................................................................................................ii -
On the Somali Temporal Lexicon
Bildhaan Vol. 19 on the Somali temporal Lexicon Georgi Kapchits Let go of what has gone; hold onto what is coming. (A Somali proverb) The Somali attitude towards time, as expressed in the above proverb, i.e., what happens now is more important than what already hap- pened, closely resembles that of the Russians: “Do not grieve for what happened in the evening: wait for what will happen in the morning.”1 The rich and diverse Somali temporal lexicon of over two hundred lexical units denoting different time intervals and actions related to the counting of time, is not completely original since parts of it came to Somali from Arabic along with some borrowings from the English and Italian languages. The Somali terminology itself is mostly common to all regional dialects which includes the variability of individual words and lexemes. 1. Time. For designation of the notion of time the Somalis use about a dozen words, the most common of which is Arabic waqti time. The temporal terms in the Somali language are mainly nouns. There are also verbs and a few allologs, which are usually called adverbs. Somali nouns have a category of definiteness with the opposi- tion of a definite and indefinite article (the latter has a zero indication). The definite article is attached to the stem as a suffix and indicates the gender of the noun – masculine or feminine. There are four definite articles for masculine nouns: -ka, -ga, -ha and -a, and three for femi- nine nouns: -ta, -da and -sha. The form of the article depends on the final phoneme of the stem.