|
Baháʼí Calendar
The Badíʻ calendar used in the Baháʼí Faith is a solar calendar consisting of nineteen months and four or five intercalary days, with new year at the moment of Northern spring equinox. Each month is named after a virtue(e.g. Perfection, Mercy), as are the days of the week. The first year is dated from 1844 CE, the year in which the Báb began teaching. Years on the calendar are annotated with the date notation of BE (Baháʼí Era). The Baháʼí year BE on March . History The Baháʼí calendar started from the original Badíʿ calendar, created by the Báb in the ''Kitabu'l-Asmáʼ''Lambden, Stephen (2018). Kitab al-asma' – The Book of Names'. Lambden states that the "source did not, however, give precise details about where the calendral materials were located in the Kitab al-asma'." and the ''Persian Bayán'' (5:3) in the 1840s. An early version of the calendar began to be implemented during his time. It used a scheme of nineteen months of nineteen days, with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baháʼí Faith
The Baháʼí Faith is a religion founded in the 19th century that teaches the Baháʼí Faith and the unity of religion, essential worth of all religions and Baháʼí Faith and the unity of humanity, the unity of all people. Established by Baháʼu'lláh in the 19th century, it initially developed in Iran and parts of the Middle East, where it has faced ongoing Persecution of Baháʼís, persecution since its inception. The religion is estimated to have 5–8 million adherents, known as Baháʼís, spread throughout most of the world's countries and territories. The Baháʼí Faith has three central figures: the Báb (1819–1850), considered a herald who taught his followers that God would soon send a prophet similar to Jesus or Muhammad; the Báb was executed by Iranian authorities in 1850; Baháʼu'lláh (1817–1892), who claimed to be that prophet in 1863 and faced exile and imprisonment for most of his life; and his son, ʻAbdu'l-Bahá (1844–1921), who was released f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kitáb-i-Aqdas
The Kitáb-i-Aqdas (Arabic: The Most Holy Book) is the central religious text of the Baháʼí Faith, written by Baháʼu'lláh, the founder of the religion, in 1873. Though it is the main source of Baháʼí laws and practices, much of the content deals with other matters, like foundational principles of the religion, the establishment of Baháʼí institutions, mysticism, ethics, social principles, and prophecies. In Baha'i literature it is described as "the Mother-Book" of the Baháʼí teachings, and the "Charter of the future world civilization". Baháʼu'lláh had manuscript copies sent to Baháʼís in Iran some years after its writing in 1873, and in 1890–91 (1308 AH, 47 BE) he arranged for its first publication in Bombay, India. Parts of the text were translated to English by Shoghi Effendi, which, along with a ''Synopsis and Codification'' were published in 1973 by the Universal House of Justice at the centennial anniversary of its writing. The full authoritative E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Square Root
In mathematics, a square root of a number is a number such that ; in other words, a number whose ''square'' (the result of multiplying the number by itself, or ⋅ ) is . For example, 4 and −4 are square roots of 16, because . Every nonnegative real number has a unique nonnegative square root, called the ''principal square root'', which is denoted by \sqrt, where the symbol \sqrt is called the ''radical sign'' or ''radix''. For example, to express the fact that the principal square root of 9 is 3, we write \sqrt = 3. The term (or number) whose square root is being considered is known as the ''radicand''. The radicand is the number or expression underneath the radical sign, in this case 9. For nonnegative , the principal square root can also be written in exponent notation, as . Every positive number has two square roots: \sqrt, which is positive, and -\sqrt, which is negative. The two roots can be written more concisely using the ± sign as \plusmn\sqrt. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lunar Cycle
Concerning the lunar month of ~29.53 days as viewed from Earth, the lunar phase or Moon phase is the shape of the Moon's directly sunlit portion, which can be expressed quantitatively using areas or angles, or described qualitatively using the terminology of the 4 major phases: new moon, first quarter, full moon, last quarter and 4 minor phases: waxing crescent, waxing gibbous, waning gibbous, and waning crescent. The lunar phases gradually change over a synodic month (~29.53 days) as the Moon's orbital positions around Earth and Earth around the Sun shift. The visible side of the Moon is variously sunlit, depending on the position of the Moon in its orbit. Thus, this face's sunlit portion can vary from 0% (at new moon) to 100% (at full moon). Each of the 4 major lunar phases (see below) is ~7.4 days, with +/− 19 hours in variation (6.58–8.24 days) due to the elliptical shape of the Moon's orbit. Phases of the Moon There are four ''principal'' (primary/major) lunar phases ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Week
A week is a unit of time equal to seven days. It is the standard time period used for short cycles of days in most parts of the world. The days are often used to indicate common work days and rest days, as well as days of worship. Weeks are often mapped against yearly calendars, but are typically not the basis for them, as weeks are not based on astronomy. The modern seven-day week can be traced back to the Babylonians, who used it within Babylonian calendar, their calendar. Other ancient cultures had different week lengths, including ten in Ancient Egypt, Egypt and an eight-day week for Etruscan civilization, Etruscans. The Etruscan week was adopted by the Ancient Romans, but they later moved to a seven-day week, which had spread across Western Asia and the Eastern Mediterranean. In 321 AD, Emperor Constantine officially decreed a seven-day week in the Roman Empire, including making Sunday a public holiday. This later spread across Europe, then the rest of the world. In Engli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eviatar Zerubavel
Eviatar Zerubavel (born 1948) is professor of sociology at Rutgers University, a specialist in the sociology of cognition and everyday life, including topics such as time, boundaries, and categorization. Biography Zerubavel is a grandson of Ya'akov Zerubavel. Born in Israel in 1948 to parents in diplomatic service, he spent much of his childhood abroad. He studied first at the University of Tel Aviv and then received his Ph.D. in sociology from the University of Pennsylvania in 1976, where he studied under Erving Goffman. After teaching at Columbia University and the State University of New York at Stony Brook, he has spent the bulk of his career at Rutgers University. In 2003 he was awarded a Guggenheim Fellowship, and in 2007 he was recognized as a Board of Governors and Distinguished Professor of Sociology. Zerubavel's first notable contributions were in the study of time, particularly the sociology and standardization of time. His books in this area were ''Patterns of Tim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World Geodetic System 1984
The World Geodetic System (WGS) is a standard used in cartography, geodesy, and satellite navigation including GPS. The current version, WGS 84, defines an Earth-centered, Earth-fixed coordinate system and a geodetic datum, and also describes the associated Earth Gravitational Model (EGM) and World Magnetic Model (WMM). The standard is published and maintained by the United States National Geospatial-Intelligence Agency. Definition The coordinate origin of WGS 84 is meant to be located at the Earth's center of mass; the uncertainty is believed to be less than . The WGS 84 meridian of zero longitude is the IERS Reference Meridian,European Organisation for the Safety of Air Navigation and IfEN: WGS 84 Implementation Manual, p. 13. 1998 5.3 arc seconds or east of the Greenwich meridian at the latitude of the Royal Observatory. (This is related to the fact that the local gravity field at Greenwich doesn't point exactly through the Earth's center of mass, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United Kingdom
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. The United Kingdom includes the island of Great Britain, the north-eastern part of the island of Ireland, and many smaller islands within the British Isles. Northern Ireland shares a land border with the Republic of Ireland; otherwise, the United Kingdom is surrounded by the Atlantic Ocean, the North Sea, the English Channel, the Celtic Sea and the Irish Sea. The total area of the United Kingdom is , with an estimated 2020 population of more than 67 million people. The United Kingdom has evolved from a series of annexations, unions and separations of constituent countries over several hundred years. The Treaty of Union between the Kingdom of England (which included Wales, annexed in 1542) and the Kingdom of Scotland in 170 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HM Nautical Almanac Office
His Majesty's Nautical Almanac Office (HMNAO), now part of the United Kingdom Hydrographic Office, was established in 1832 on the site of the Royal Observatory, Greenwich (ROG), where ''The Nautical Almanac'' had been published since 1767. HMNAO produces astronomical data for a wide range of users, such as astronomers, mariners, aviators, surveyors, the military, Police, lawyers, religious groups, architects, schools, diary and calendar manufacturers, photographers and film crews. In 1937, it became part of ROG and moved with it, when it moved away from Greenwich (and was renamed the Royal Greenwich Observatory) first to Herstmonceux Castle, near Hailsham in East Sussex in 1948, then to Cambridge in 1990. When the RGO closed in 1998 HMNAO was transferred to the Rutherford Appleton Laboratory, near Abingdon in Oxfordshire. In December 2006, HMNAO was transferred to the United Kingdom Hydrographic Office, which is based in Taunton in Somerset. Leaders of HMNAO Superintendents of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tehran
Tehran (; fa, تهران ) is the largest city in Tehran Province and the capital of Iran. With a population of around 9 million in the city and around 16 million in the larger metropolitan area of Greater Tehran, Tehran is the most populous city in Iran and Western Asia, and has the second-largest metropolitan area in the Middle East, after Cairo. It is ranked 24th in the world by metropolitan area population. In the Classical era, part of the territory of present-day Tehran was occupied by Rhages, a prominent Median city destroyed in the medieval Arab, Turkic, and Mongol invasions. Modern Ray is an urban area absorbed into the metropolitan area of Greater Tehran. Tehran was first chosen as the capital of Iran by Agha Mohammad Khan of the Qajar dynasty in 1786, because of its proximity to Iran's territories in the Caucasus, then separated from Iran in the Russo-Iranian Wars, to avoid the vying factions of the previously ruling Iranian dynasties. The capital has been ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gregorian Calendar
The Gregorian calendar is the calendar used in most parts of the world. It was introduced in October 1582 by Pope Gregory XIII as a modification of, and replacement for, the Julian calendar. The principal change was to space leap years differently so as to make the average calendar year 365.2425 days long, more closely approximating the 365.2422-day 'tropical' or 'solar' year that is determined by the Earth's revolution around the Sun. The rule for leap years is: There were two reasons to establish the Gregorian calendar. First, the Julian calendar assumed incorrectly that the average solar year is exactly 365.25 days long, an overestimate of a little under one day per century, and thus has a leap year every four years without exception. The Gregorian reform shortened the average (calendar) year by 0.0075 days to stop the drift of the calendar with respect to the equinoxes.See Wikisource English translation of the (Latin) 1582 papal bull '' Inter gravissimas''. Second, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.svg "Click for more on -> World Geodetic System 1984")
.svg "Click for more on -> United Kingdom")
