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The following is a list of prominent Jewish astronomers of the Middle Ages, with the approximate periods of their activity, arranged in alphabetical order of first names.
This article incorporates text from a publication now in the public domain : Singer, Isidore; et al., eds. (1901–1906). "Astronomy". The Jewish Encyclopedia . New York: Funk & Wagnalls.
Antisemitism or Jew-hatred is hostility to, prejudice towards, or discrimination against, Jews. This sentiment is a form of racism, and a person who harbours it is called an antisemite. Primarily, antisemitic tendencies may be motivated by negative sentiment towards Jews as a people or by negative sentiment towards Jews with regard to Judaism. In the former case, usually presented as racial antisemitism, a person's hostility is driven by the belief that Jews constitute a distinct race with inherent traits or characteristics that are repulsive or inferior to the preferred traits or characteristics within that person's society. In the latter case, known as religious antisemitism, a person's hostility is driven by their religion's perception of Jews and Judaism, typically encompassing doctrines of supersession that expect or demand Jews to turn away from Judaism and submit to the religion presenting itself as Judaism's successor faith—this is a common theme within the other Abrahamic religions. The development of racial and religious antisemitism has historically been encouraged by the concept of anti-Judaism, which is distinct from antisemitism itself.
Judaism is an Abrahamic monotheistic ethnic religion that comprises the collective spiritual, cultural, and legal traditions of the Jewish people. Judaism evolved from Yahwism, an ancient Semitic religion of the late Bronze Age to early Iron Age, likely around the 6th/5th century BCE. Along with Samaritanism, to which it is closely related, Judaism is one of the two oldest Abrahamic religions.
Flavius Josephus or Yosef ben Mattityahu was a Roman–Jewish historian and military leader. Best known for writing The Jewish War, he was born in Jerusalem—then part of the Roman province of Judea—to a father of priestly descent and a mother who claimed royal ancestry.
Kabbalah or Qabalah is an esoteric method, discipline and school of thought in Jewish mysticism. A traditional Kabbalist is called a Mekubbal. The definition of Kabbalah varies according to the tradition and aims of those following it, from its origin in medieval Judaism to its later adaptations in Western esotericism. Jewish Kabbalah is a set of esoteric teachings meant to explain the relationship between the unchanging, eternal God—the mysterious Ein Sof —and the mortal, finite universe. It forms the foundation of mystical religious interpretations within Judaism.
Shabbat or the Sabbath, also called Shabbos by Ashkenazim, is Judaism's day of rest on the seventh day of the week—i.e., Saturday. On this day, religious Jews remember the biblical stories describing the creation of the heaven and earth in six days and the redemption from slavery and the Exodus from Egypt, and look forward to a future Messianic Age. Since the Jewish religious calendar counts days from sunset to sunset, Shabbat begins in the evening of what on the civil calendar is Friday.
Yiddish is a West Germanic language historically spoken by Ashkenazi Jews. It originated in 9th century Central Europe, and provided the nascent Ashkenazi community with a vernacular based on High German fused with many elements taken from Hebrew and to some extent Aramaic. Most varieties of Yiddish include elements of Slavic languages and the vocabulary contains traces of Romance languages. Yiddish has traditionally been written using the Hebrew alphabet; however, there are variations, including the standardized YIVO orthography that employs the Latin alphabet.
Zionism is an ethno-cultural nationalist movement that emerged in Europe in the late 19th century and aimed for the establishment of a Jewish state through the colonization of a land outside of Europe. It eventually focused on the establishment of a Jewish homeland in Palestine, a region corresponding to the Land of Israel in Judaism, and of central importance in Jewish history. Zionists wanted to create a Jewish state in Palestine with as much land, as many Jews, and as few Palestinian Arabs as possible. Following the establishment of the State of Israel in 1948, Zionism became the ideology supporting the protection and development of Israel as a Jewish state and has been described as Israel's national or state ideology.
A pogrom is a violent riot incited with the aim of massacring or expelling an ethnic or religious group, particularly Jews. The term entered the English language from Russian to describe 19th- and 20th-century attacks on Jews in the Russian Empire. Retrospectively, similar attacks against Jews which occurred in other times and places also became known as pogroms. Sometimes the word is used to describe publicly sanctioned purgative attacks against non-Jewish groups. The characteristics of a pogrom vary widely, depending on the specific incident, at times leading to, or culminating in, massacres.
In the 20th century, approximately 900000 Jews migrated, fled, or were expelled from Muslim-majority countries throughout Africa and Asia. Primarily a consequence of the 1948 Arab–Israeli War, the mass movement mainly transpired from 1948 to the early 1970s, with one final exodus of Iranian Jews occurring shortly after the Islamic Revolution in 1979–1980. An estimated 650000 (72%) of these Jews resettled in Israel.
Ashkenazi Jews, also known as Ashkenazic Jews or Ashkenazim, constitute a Jewish diaspora population that emerged in the Holy Roman Empire around the end of the first millennium CE. They traditionally spoke Yiddish, a language that originated in the 9th century, and largely migrated towards northern and eastern Europe during the late Middle Ages due to persecution. Hebrew was primarily used as a literary and sacred language until its 20th-century revival as a common language in Israel.
SephardicJews, also known as Sephardi Jews or Sephardim, and rarely as Iberian Peninsular Jews, are a Jewish diaspora population associated with the Iberian Peninsula. The term, which is derived from the Hebrew Sepharad, can also refer to the Jews of the Middle East and North Africa, who were also heavily influenced by Sephardic law and customs. Many Iberian Jewish exiled families also later sought refuge in those Jewish communities, resulting in ethnic and cultural integration with those communities over the span of many centuries. The majority of Sephardim live in Israel.
Jewish history is the history of the Jews, their nation, religion, and culture, as it developed and interacted with other peoples, religions, and cultures.
Aliyah is the immigration of Jews from the diaspora to, historically, the geographical Land of Israel or the Palestine region, which is today chiefly represented by the State of Israel. Traditionally described as "the act of going up", moving to the Land of Israel or "making aliyah" is one of the most basic tenets of Zionism. The opposite action — emigration by Jews from the Land of Israel — is referred to in the Hebrew language as yerida. The Law of Return that was passed by the Israeli parliament in 1950 gives all diaspora Jews, as well as their children and grandchildren, the right to relocate to Israel and acquire Israeli citizenship on the basis of connecting to their Jewish identity.
The Jewish diaspora or exile is the dispersion of Israelites or Jews out of their ancient ancestral homeland and their subsequent settlement in other parts of the globe.
The history of the Jews in Poland dates back at least 1,000 years. For centuries, Poland was home to the largest and most significant Ashkenazi Jewish community in the world. Poland was a principal center of Jewish culture, because of the long period of statutory religious tolerance and social autonomy which ended after the Partitions of Poland in the 18th century. During World War II there was a nearly complete genocidal destruction of the Polish Jewish community by Nazi Germany and its collaborators of various nationalities, during the German occupation of Poland between 1939 and 1945, called the Holocaust. Since the fall of communism in Poland, there has been a renewed interest in Jewish culture, featuring an annual Jewish Culture Festival, new study programs at Polish secondary schools and universities, and the opening of Warsaw's Museum of the History of Polish Jews.
"Who is a Jew?" is a basic question about Jewish identity and considerations of Jewish self-identification. The question pertains to ideas about Jewish personhood, which have cultural, ethnic, religious, political, genealogical, and personal dimensions. Orthodox Judaism and Conservative Judaism follow Jewish law (halakha), deeming people to be Jewish if their mothers are Jewish or if they underwent a halakhic conversion. Reform Judaism and Reconstructionist Judaism accept both matrilineal and patrilineal descent as well as conversion. Karaite Judaism predominantly follows patrilineal descent as well as conversion.
American Jews or Jewish Americans are American citizens who are Jewish, whether by culture, ethnicity, or religion. According to a 2020 poll conducted by Pew Research, approximately two thirds of American Jews identify as Ashkenazi, 3% identify as Sephardic, and 1% identify as Mizrahi. An additional 6% identify as some combination of the three categories.
As of 2023, the world's core Jewish population was estimated at 15.7 million, which is approximately 0.2% of the 8 billion worldwide population. Israel hosts the largest core Jewish population in the world with 7.2 million, followed by the United States with 5.7 million. Other countries with core Jewish populations above 100,000 include France (440,000), Canada (398,000), the United Kingdom (312,000), Argentina (171,000), Russia (132,000), Germany (125,000), and Australia (117,200). The number of Jews worldwide rises to 18 million with the addition of the "connected" Jewish population, including those who say they are partly Jewish or that have Jewish backgrounds from at least one Jewish parent, and rises again to 21 million with the addition of the "enlarged" Jewish population, including those who say they have Jewish backgrounds but no Jewish parents and all non-Jewish household members who live with Jews. Counting all those who are eligible for Israeli citizenship under Israel's Law of Return, in addition to Israeli Jews, raised the total to 25.5 million.
The Jews or Jewish people are an ethnoreligious group and nation originating from the Israelites of the ancient Near East, and whose traditional religion is Judaism. Jewish ethnicity, religion, and community are highly interrelated, as Judaism is an ethnic religion, although not all ethnic Jews practice it. Despite this, religious Jews regard individuals who have formally converted to Judaism as part of the community.
Mandatory Palestine was a geopolitical entity that existed between 1920 and 1948 in the region of Palestine under the terms of the League of Nations Mandate for Palestine.