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Qibla Compass
A Qibla compass or qiblah compass (sometimes also called qibla/qiblah indicator or ''qiblanuma'') is a modified compass used by Muslims to indicate the direction to face to perform prayers. In Islam, this direction is called qibla, and points towards the city of Mecca and specifically to the Ka'abah. While the compass, like any other compass, points north, the direction of prayer is indicated by marks on the perimeter of the dial, corresponding to different cities, or by a second pointer set by the user according to their own location. To determine the proper direction, one has to know with some precision both the longitude and latitude of one's own location and those of Mecca, the city toward which one must face. Once that is determined, the values are applied to a spherical triangle, and the angle from the local meridian to the required direction of Mecca can be determined. The indicator usually consists of a round brass box with a hinged lid and an inset magnetic compass. A li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Al-Ashraf Compass And Qibla Diagram
__NOTOC__ Al-Ashraf, either from ( ar, الأشرف, 'the most noble') or (, 'the nobles'), may refer to: People * Al-Ashraf Al-Barsbay, Burji Mamluk sultan of Egypt (1422–1438) * Al-Ashraf Qansuh al-Ghuri, Mamluk Sultan (1501–1516) * Al-Ashraf Janbalat, Sultan of Egypt (1500–1501) * Al-Ashraf Khalil, Mamluk Sultan (1290–1293) * Al-Ashraf Kujuk, Mamluk Sultan (1341–1342) * Al-Ashraf Musa, Emir of Homs (1246–1263) * Al-Ashraf Musa, Sultan of Egypt (1250–1254) * Al-Ashraf Musa, Emir of Damascus and Ba'albek (1229–1237) * Al-Ashraf Sha'ban, Mamluk Sultan (1363–1377) * Al-Ashraf Tuman bay, last Sultan of Egypt (1516–1517) * Al-Ashraf Umar II (1242–1296), Rasulid sultan, mathematician and astronomer Places * Al Ashraf, Makkah, village in Makkah Region of Saudi Arabia * Al Ashraf, 'Asir, village in 'Asir Region of Saudi Arabia * Al-Ashraf (Taiz), district in Yemen Mosques * Al-Ashraf Mosque The Al-Ashraf Mosque or the Mosque-Madrasa of Sultan al-Ashraf Ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Islamic Culture
Islamic culture and Muslim culture refer to cultural practices which are common to historically Islamic people. The early forms of Muslim culture, from the Rashidun Caliphate to the early Umayyad period and the early Abbasid period, were predominantly Arab, Byzantine, Persian and Levantine. With the rapid expansion of the Islamic empires, Muslim culture has influenced and assimilated much from the Persian, Egyptian, North Caucasian, Turkic, Mongol, Indian, Bangladeshi, Pakistani, Malay, Somali, Berber, Indonesian, and Moro cultures. Islamic culture generally includes all of the practices which have developed around the religion of Islam. There are variations in the application of Islamic beliefs in different cultures and traditions. Language and literature Arabic Arabic literature ( ar, الأدب العربي / ALA-LC: ''al-Adab al-'Arabī'') is the writing, both prose and poetry, produced by writers in the Arabic language. The Arabic word used for literature is ''" A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Craig Retroazimuthal Projection
The Craig retroazimuthal map projection was created by James Ireland Craig in 1909. It is a modified cylindrical projection. As a retroazimuthal projection, it preserves directions from everywhere to one location of interest that is configured during construction of the projection. The projection is sometimes known as the Mecca projection because Craig, who had worked in Egypt as a cartographer, created it to help Muslims find their qibla. In such maps, Mecca is the configurable location of interest. Given latitude ''φ'' to plot, latitude ''φ'' of the fixed location of interest, longitude ''λ'' to plot, and the longitude ''λ'' of the fixed location of interest, the projection is defined by: :\begin x &= \lambda - \lambda_0\\ y &= \frac\Big(\sin \varphi \cos \left(\lambda - \lambda_0\right) - \tan \varphi_0 \cos \varphi\Big)\end But when ''λ'' − ''λ'' = 0, ''y'' above is undefined, so instead use the ratio's continuous completion: :y = \sin \varphi \cos \lef ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meridian (astronomy)
In astronomy, the meridian is the great circle passing through the celestial poles, as well as the zenith and nadir of an observer's location. Consequently, it contains also the north and south points on the horizon, and it is perpendicular to the celestial equator and horizon. Meridians, celestial and geographical, are determined by the pencil of planes passing through the Earth's rotation axis. For a location ''not'' at a geographical pole, there is a unique meridian plane in this axial-pencil through that location. The intersection of this plane with Earth's surface is the '' geographical meridian'', and the intersection of the plane with the celestial sphere is the celestial meridian for that location and time. There are several ways to divide the meridian into semicircles. In the horizontal coordinate system, the observer's meridian is divided into halves terminated by the horizon's north and south points. The observer's upper meridian passes through the zenith while the l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sundials
A sundial is a horological device that tells the time of day (referred to as civil time in modern usage) when direct sunlight shines by the apparent position of the Sun in the sky. In the narrowest sense of the word, it consists of a flat plate (the ''dial'') and a gnomon, which casts a shadow onto the dial. As the Sun appears to move through the sky, the shadow aligns with different hour-lines, which are marked on the dial to indicate the time of day. The ''style'' is the time-telling edge of the gnomon, though a single point or ''nodus'' may be used. The gnomon casts a broad shadow; the shadow of the style shows the time. The gnomon may be a rod, wire, or elaborately decorated metal casting. The style must be parallel to the axis of the Earth's rotation for the sundial to be accurate throughout the year. The style's angle from horizontal is equal to the sundial's geographical latitude. The term ''sundial'' can refer to any device that uses the Sun's altitude or azimuth ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astrolabes
An astrolabe ( grc, ἀστρολάβος ; ar, ٱلأَسْطُرلاب ; persian, ستارهیاب ) is an ancient astronomical instrument that was a handheld model of the universe. Its various functions also make it an elaborate inclinometer and an analog calculation device capable of working out several kinds of problems in astronomy. In its simplest form it is a metal disc with a pattern of wires, cutouts, and perforations that allows a user to calculate astronomical positions precisely. Historically used by astronomers, it is able to measure the altitude above the horizon of a celestial body, day or night; it can be used to identify stars or planets, to determine local latitude given local time (and vice versa), to survey, or to triangulate. It was used in classical antiquity, the Islamic Golden Age, the European Middle Ages and the Age of Discovery for all these purposes. The astrolabe's importance comes not only from the early developments into the study of astron ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isis (journal)
''Isis'' is a quarterly peer-reviewed academic journal published by the University of Chicago Press. It covers the history of science, history of medicine, and the history of technology, as well as their cultural influences. It contains original research articles and extensive book reviews and review essays. Furthermore, sections devoted to one particular topic are published in each issue in open access. These sections consist of the Focus section, the Viewpoint section and the Second Look section. History The journal was established by George Sarton and the first issue appeared in March 1913. Contributions were originally in any of four European languages (English, French, German, and Italian), but since the 1920s, only English has been used. Publication is partly supported by an endowment from the Dibner Fund. Two associated publications are ''Osiris'' (established 1936 by Sarton) and the ''Isis Current Bibliography''. The publication of the journal was interrupted in 1914 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rasulid Dynasty
The Rasulids ( ar, بنو رسول, Banū Rasūl) were a Sunni Islam, Sunni Muslim dynasty who ruled Yemen from 1229 to 1454. History Origin of the Rasulids The Rasulids took their name from al-Amin's nickname "Rasul". The Zaidiyyah, Zaidi Shi'i Imams of Yemen were the arch rivals of the Sunni Rasulids, and Zaidi sources emphasized the dynasty's Ghuzz origin to ensure the Qahtani majority of Yemen treats them more harshly as rootless outsiders. The term ''Ghuzz'' in Arabic sources is associated with the Oghuz Turks. The Ghuzz term appeared regularly in Zaidi literature and was for pre-Ottoman Empire, Ottoman era of Oghuz Turkic mamluks & Turkic state (Seljuk Empire, Seljuk) who were actively expanding in Oman to the east of Yemen, later writers used this Arabic term which describes the Oghuz Turks, in the Zaidi sources, as their reference of the Turkic origin of the Rasulids. Some historians and genealogists that served the Rasulid dynasty claimed an Arabs, Arab origin for the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Al-Ashraf Umar II
Al‐Malik Al‐Ashraf (Mumahhid Al‐Din) Umar Ibn Yūsuf Ibn Umar Ibn Alī Ibn Rasul (), also as Umar Ibn Yusuf (or also Al-Asharaf Umar II) was the third Rasulid sultan and also an mathematician, astronomer and physician. Biography Umar Ibn Yusuf was born in 1242 in Yemen and he died in 1296. He is known for writing the first description of the use of a magnetic compass for determining the qibla. Also, his works on astronomy contain important information on earlier sources. In a treatise about astrolabes and sundials, al-Ashraf includes several paragraphs on the construction of a compass bowl (ṭāsa). He then uses the compass to determine the north point, the meridian (khaṭṭ niṣf al-nahār), and the Qibla towards Mecca. This is the first mention of a compass in a medieval Islamic scientific text and its earliest known use as a qibla indicator, although al-Ashraf did not claim to be the first to use it for this purpose. http://www.uib.no/jais/v001ht/01-081-132schmidl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Qibla Compass
A Qibla compass or qiblah compass (sometimes also called qibla/qiblah indicator or ''qiblanuma'') is a modified compass used by Muslims to indicate the direction to face to perform prayers. In Islam, this direction is called qibla, and points towards the city of Mecca and specifically to the Ka'abah. While the compass, like any other compass, points north, the direction of prayer is indicated by marks on the perimeter of the dial, corresponding to different cities, or by a second pointer set by the user according to their own location. To determine the proper direction, one has to know with some precision both the longitude and latitude of one's own location and those of Mecca, the city toward which one must face. Once that is determined, the values are applied to a spherical triangle, and the angle from the local meridian to the required direction of Mecca can be determined. The indicator usually consists of a round brass box with a hinged lid and an inset magnetic compass. A li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compass
A compass is a device that shows the cardinal directions used for navigation and geographic orientation. It commonly consists of a magnetized needle or other element, such as a compass card or compass rose, which can pivot to align itself with magnetic north. Other methods may be used, including gyroscopes, magnetometers, and GPS receivers. Compasses often show angles in degrees: north corresponds to 0°, and the angles increase clockwise, so east is 90°, south is 180°, and west is 270°. These numbers allow the compass to show azimuths or bearings which are commonly stated in degrees. If local variation between magnetic north and true north is known, then direction of magnetic north also gives direction of true north. Among the Four Great Inventions, the magnetic compass was first invented as a device for divination as early as the Chinese Han Dynasty (since c. 206 BC),Li Shu-hua, p. 176 and later adopted for navigation by the Song Dynasty Chinese during the 11th centur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
