Islam

Medieval Islamic astronomy comprises the astronomical developments made in the Islamic world, particularly during the Islamic Golden Age (9th–13th centuries), and mostly written in the Arabic language. These developments mostly took place in the Middle East, Central Asia, Al-Andalus, and North Africa, and later in the Far East and India. It closely parallels the genesis of other Islamic sciences in its assimilation of foreign material and the amalgamation of the disparate elements of that material to create a science with Islamic characteristics. These included Greek, Sassanid, and Indian works in particular, which were translated and built upon.

Islamic astronomy played a significant role in the revival of ancient astronomy following the loss of knowledge during the early medieval period, notably with the production of Latin translations of Arabic works during the 12th century.

There are two main holidays in Islam that are celebrated by Muslims worldwide: Eid al-Fitr and Eid al-Adha. The timing of both holidays are set by the lunar Islamic calendar, which is based upon the cycle of the moon, and so is different from the more common, European, solar-based Gregorian calendar. Every year, the Gregorian dates of the Islamic holidays change.

Both Eid al-Fitr and Eid al-Adha follow a period of 10 holy days or nights: the last 10 nights of Ramadan for Eid al-Fitr, and the first 10 days of Dhu al-Hijjah for Eid al-Adha. The Night of Power (Arabic: لیلة القدر, romanized: Laylat al-Qadr), one of the last 10 nights of Ramadan, is the holiest night of the year. Conversely, the Day of Arafah, the day before Eid al-Adha, is the holiest day of the Islamic year.

The Hijri era (Arabic: التقويم الهجري, romanized: at-taqwīm al-hijrī) is the calendar era used to record dates in the Islamic world. Its epoch (start point of the era) is the year in which Muhammad and his followers migrated from Mecca to Yathrib (now Medina), in 622 CE. This event, known as the Hijrah, is commemorated in Islam for its role in the founding of the first Muslim community (ummah). Time in this era is measured by two principal calendars: the lunar Hijri calendar (known in the West as the "Islamic calendar") which counts lunar years since the Hijrah and which is used by most Muslims around the world; and the solar Hijri calendar (also known as the "Persian calendar") which counts solar years since the Hijrah and which is used in Iran.

In the West, dates in the lunar Hijri calendar are denoted as AH (Latin: Anno Hegirae) or Hijri year (Arabic: سنة هجرية, romanized: sanat hijriyya, lit. 'in the year of the Hijra') in the style of the Christian/Common (AD/CE) and Jewish eras (AM) and can similarly be placed before (preferably) or after the date. In predominantly Muslim countries, it is also commonly abbreviated H ("Hijra") from its Arabic abbreviation hāʾ (هـ). Years prior to AH 1 are reckoned in English as BH ("Before the Hijra"), which follows the date. Dates in the solar Hijri calendar are denoted as SH. The current year according to the lunar Hijri calendar is AH 1447; according to the solar Hijri calendar the current year is SH 1404. The difference in numbering arises because a lunar year is about eleven days shorter than a solar year.

The Hijrah, (Arabic: الهجرة, romanized: al-Hijrah, lit. 'migration') also Hegira (from Medieval Latin), was the journey the Islamic prophet Muhammad and his followers took from Mecca to Medina. The year in which the Hijrah took place is also identified as the epoch of the Lunar Hijri and Solar Hijri calendars; its date equates to 16 July 622 in the Julian calendar.

Early in Muhammad's preaching of Islam, his followers only included his close friends and relatives. Most of his tribesmen, the Quraysh, however, were indifferent to his activities, as they did not appear to be particularly interested in devotional meetings, and accordingly, Muhammad did not encounter any serious opposition from them; that was the case until he began to challenge their beliefs, which caused tensions to arise.

A faqih (Arabic: فقيه, pl. فقهاء; faqīh, pl. fuqahāʔ‎) is an Islamic jurist, an expert in fiqh, or Islamic jurisprudence and Islamic law.

Fiqh ([fiːk]; Arabic: فقه [fiqh]) is the term for Islamic jurisprudence. Fiqh is often described as the style of human understanding, research and practices of the sharia; that is, human understanding of the divine Islamic law as revealed in the Quran and the sunnah (the teachings and practices of the Islamic prophet Muhammad and his companions). Fiqh expands and develops Shariah through interpretation (ijtihad) of the Quran and Sunnah by Islamic jurists (ulama) and is implemented by the rulings (fatwa) of jurists on questions presented to them. Thus, whereas sharia is considered immutable and infallible by Muslims, fiqh is considered fallible and changeable. Fiqh deals with the observance of rituals, morals and social legislation in Islam as well as economic and political system. In the modern era, there are four prominent schools (madh'hab) of fiqh within Sunni practice, plus two (or three) within Shi'a practice. A person trained in fiqh is known as a faqīh (pl.: fuqaha).

Figuratively, fiqh means knowledge about Islamic legal rulings from their sources. Deriving religious rulings from their sources requires the mujtahid (an individual who exercises ijtihad) to have a deep understanding in the different discussions of jurisprudence.

Political aspects of the religion of Islam are derived from its religious scripture (the Quran holy book, ḥadīth literature of accounts of the sayings and living habits attributed to the Islamic prophet Muhammad, and sunnah), as well as elements of political movements and tendencies followed by Muslims or Islamic states throughout its history. Shortly after its founding, Islam's prophet Muhammad became a ruler of a state, and the intertwining of religion and state in Islam (and the idea that "politics is central" to Islam), is in contrast to the doctrine of rendering "unto Caesar what belongs to Caesar and to God what belongs to God", of Christianity, its related and neighboring religion.

Traditional political concepts in Islam which form an idealized model for Islamic rule, are based on the rule of Muhammad in Mecca (629–632 CE) and his elected or selected successors, known as rāshidūn ("rightly-guided") caliphs in Sunnī Islam, and the Imams in Shīʿa Islam. Concepts include obedience to the Islamic law (sharīʿa); the supremacy of unity, solidarity and community, over individual rights and diversity; the pledging of obedience by the ruled to rulers (al-Bayʿah), with a corresponding duty of rulers to rule justly and seek consultation (shūrā) before making decisions; and the ruled to rebuke unjust rulers. Classical Islamic political thought focuses on advice on how to govern well, rather than reflecting "on the nature of politics".

Prophets in Islam (Arabic: ٱلْأَنْبِيَاء فِي ٱلْإِسْلَام, romanized: al-anbiyāʾ fī al-islām) are individuals in Islam who are believed to spread God's message on Earth and serve as models of ideal human behaviour. Some prophets are categorized as messengers (Arabic: رُسُل, romanized: rusul; sing. رَسُول, rasool), those who transmit divine revelation, most of them through the interaction of an angel. Muslims believe that many prophets existed, including many not mentioned in the Quran. The Quran states: "And for every community there is a messenger." Belief in the Islamic prophets is one of the six articles of the Islamic faith.

Muslims believe that the first prophet was also the first human being Adam, created by God. Many of the revelations delivered by the 48 prophets in Judaism and many prophets of Christianity are mentioned as such in the Quran with the Arabic versions of their names; for example, the Jewish Elisha is called Alyasa', Job is Ayyub, Jesus is 'Isa, etc. The Torah given to Moses (Musa) is called Tawrat, the Psalms given to David (Dawud) is the Zabur, the Gospel given to Jesus is Injil.

Shia Islam is the second-largest branch of Islam. It holds that Muhammad designated Ali ibn Abi Talib (r. 656–661) as both his political successor (caliph) and as the spiritual leader of the Muslim community (imam). However, his right is understood to have been usurped by a number of Muhammad's companions at the meeting of Saqifa, during which they appointed Abu Bakr (r. 632–634) as caliph instead. As such, Sunni Muslims believe Abu Bakr, Umar (r. 634–644), Uthman (r. 644–656) and Ali to be 'rightly-guided caliphs', whereas Shia Muslims regard only Ali as the legitimate successor.

Shia Muslims believe that the imamate continued through Ali's sons, Hasan and Husayn, after which various Shia branches developed and recognized different imams. They revere the ahl al-bayt, the family of Muhammad, maintaining that they possess divine knowledge. Shia holy sites include the shrine of Ali in Najaf, the shrine of Husayn in Karbala, and other mausoleums of the ahl al-bayt. Later events, such as Husayn's martyrdom in the Battle of Karbala (680 CE), further influenced the development of Shia Islam, contributing to the formation of a distinct religious sect with its own rituals and shared collective memory.

Tamil Muslims are Tamils who practise Islam. The community is 10 million in India, primarily in the state of Tamil Nadu where 90% of the Muslim community identified themselves as Tamil Muslims. In Tamil Nadu, the majority of Tamil-speaking Muslims belong to the Rowthers Community while other Muslims live in coastal Tamil Nadu. There is a substantial diaspora, particularly in Southeast Asia, which has seen their presence as early as the 13th century. In the late 20th century, the diaspora expanded to Western Europe, Persian Gulf and North America.