Hebrew astronomy refers to any

astronomy Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest includ ...

written in

Hebrew Hebrew (; ''ʿÎbrit'') is a Northwest Semitic languages, Northwest Semitic language within the Afroasiatic languages, Afroasiatic language family. A regional dialect of the Canaanite languages, it was natively spoken by the Israelites and ...

or by Hebrew speakers, or translated into Hebrew, or written by Jews in

Judeo-Arabic Judeo-Arabic (; ; ) sometimes referred as Sharh, are a group of different ethnolects within the branches of the Arabic language used by jewish communities. Although Jewish use of Arabic, which predates Islam, has been in some ways distinct ...

. It includes a range of genres from the earliest astronomy and cosmology contained in the

Bible The Bible is a collection of religious texts that are central to Christianity and Judaism, and esteemed in other Abrahamic religions such as Islam. The Bible is an anthology (a compilation of texts of a variety of forms) originally writt ...

, mainly the

Tanakh The Hebrew Bible or Tanakh (;"Tanach"
. ''

Jewish Jews (, , ), or the Jewish people, are an ethnoreligious group and nation, originating from the Israelites of History of ancient Israel and Judah, ancient Israel and Judah. They also traditionally adhere to Judaism. Jewish ethnicity, rel ...

religious works like the

Talmud The Talmud (; ) is the central text of Rabbinic Judaism and the primary source of Jewish religious law (''halakha'') and Jewish theology. Until the advent of Haskalah#Effects, modernity, in nearly all Jewish communities, the Talmud was the cen ...

and very technical works. Some Persian and Arabian traditions ascribe the invention of astronomy to Adam, Seth and Enoch. Some scholars suggest that the signs of the zodiac, or Mazzaloth, and the names of the stars associated with them originally were created as a

mnemonic A mnemonic device ( ), memory trick or memory device is any learning technique that aids information retention or retrieval in the human memory, often by associating the information with something that is easier to remember. It makes use of e ...

device by these forefathers of the Hebrews to tell the story of the Bible. Historian

Flavius Josephus Flavius Josephus (; , ; ), born Yosef ben Mattityahu (), was a History of the Jews in the Roman Empire, Roman–Jewish historian and military leader. Best known for writing ''The Jewish War'', he was born in Jerusalem—then part of the Judaea ...

says Seth and his offspring preserved ancient astronomical knowledge in pillars of stone.

In the Bible

Only a few stars and

constellation A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object. The first constellati ...

s are named individually in the

Hebrew Bible The Hebrew Bible or Tanakh (;"Tanach"
. '' Orion, a giant angel. * ''Kimah'' (כִימָה ''Ḵīmā''), which may be the

Pleiades The Pleiades (), also known as Seven Sisters and Messier 45 (M45), is an Asterism (astronomy), asterism of an open cluster, open star cluster containing young Stellar classification#Class B, B-type stars in the northwest of the constellation Tau ...

, Aldebaran,

Arcturus , - bgcolor="#FFFAFA" , Note (category: variability): , , H and K emission vary. Arcturus is a red giant star in the Northern celestial hemisphere, northern constellation of Boötes, and the brightest star in the constellation. It ha ...

, or Sirius. * '' 'Ash'' or '' 'Ayish'' (עָשׁ '' 'Āš''), possibly the Hyades,

Ursa Major Ursa Major, also known as the Great Bear, is a constellation in the Northern Sky, whose associated mythology likely dates back into prehistory. Its Latin name means "greater (or larger) bear", referring to and contrasting it with nearby Ursa M ...

, or even the Evening Star (

Venus Venus is the second planet from the Sun. It is often called Earth's "twin" or "sister" planet for having almost the same size and mass, and the closest orbit to Earth's. While both are rocky planets, Venus has an atmosphere much thicker ...

when seen at dusk). * ''Mezarim'' (מְזָרִים ''Məzārīm''), which may be Ursa Major and Ursa Minor, or a synonym for '' mazzarot'', in which case it would refer to the planets or the constellations of the

zodiac The zodiac is a belt-shaped region of the sky that extends approximately 8° north and south celestial latitude of the ecliptic – the apparent path of the Sun across the celestial sphere over the course of the year. Within this zodiac ...

. Aside from the Earth, only two planets are named in the Hebrew Bible: * The term ''Chiun'' (כִּיּוּן ''Kīyyūn'') in Amos 5:26 is thought by some authors to refer to

Saturn Saturn is the sixth planet from the Sun and the second largest in the Solar System, after Jupiter. It is a gas giant, with an average radius of about 9 times that of Earth. It has an eighth the average density of Earth, but is over 95 tim ...

, closely related to the Assyrian "Kévan" or "'' kaiwanu''". * Venus, called ''məleḵeṯ haššāmayīm,'' (מְלֶכֶת הַשָּׁמַיִם), " the queen of heaven", in Jeremiah 7:18 and elsewhere. That the latter means Venus is shown by the cakes which are said to have been baked for her. Among the Assyrians and Babylonians, the cake offerings were called "the bread of Ishtar". ''Hēlēl'' (הֵילֵל), the "son of the morning", (בֶּן שָׁחַר ''Ben-Šāḥar'') in Isaiah 14:12, is also thought to be the morning star (Venus when visible before dawn). This identification is better known to many English speakers as its Latin name, Lucifer, the "light-bearer".

In the Talmud

The information preserved in the

does not emanate from one homogeneous system, as they are the accumulations of at least four centuries, and are traceable to various authors in the

Jerusalem Jerusalem is a city in the Southern Levant, on a plateau in the Judaean Mountains between the Mediterranean Sea, Mediterranean and the Dead Sea. It is one of the List of oldest continuously inhabited cities, oldest cities in the world, and ...

and Babylonian Talmuds, among whom many were inclined to

mysticism Mysticism is popularly known as becoming one with God or the Absolute (philosophy), Absolute, but may refer to any kind of Religious ecstasy, ecstasy or altered state of consciousness which is given a religious or Spirituality, spiritual meani ...

Astronomy as a religious study

The high value of astronomical knowledge is already demonstrated by the astronomical section of the ''

Book of Enoch The Book of Enoch (also 1 Enoch; Hebrew language, Hebrew: סֵפֶר חֲנוֹךְ, ''Sēfer Ḥănōḵ''; , ) is an Second Temple Judaism, ancient Jewish Apocalyptic literature, apocalyptic religious text, ascribed by tradition to the Patriar ...

'' (about 72–80 BC), as well as by such sayings as those of Eleazar Hisma (about 100), a profound mathematician, who could "count the drops in the ocean", and who declared that the "ability to compute the solstice and the calendar is the 'dessert' uxiliariesof wisdom. Among the sciences that Johanan ben Zakkai mastered was a knowledge of the solstices and the calendar; i.e., the ability to compute the course of the Sun and the Moon. Later writers declare that "to him who can compute the course of the sun and the revolution of the planets and neglects to do so, may be applied the words of the prophet, 'They regard not the work of the Lord, nor consider the operation of His hands.'" To pay attention to the course of the Sun and to the revolution of the planets is a religious injunction; for such is the import of the words, "This is your wisdom and your understanding in the sight of the nations". Despite the general importance and religious significance attached to astronomy in the Holy Land, no notable developments in astronomy happened there during the Talmudic period. The starry heavens of the land of Israel interested the Jews as creations of God and as means to determine the holidays, but for a better knowledge of them the Jews were undoubtedly indebted to the Babylonians and their Hellenic pupils, as evidenced by the foreign term ''

gematria In numerology, gematria (; or , plural or ) is the practice of assigning a numerical value to a name, word, or phrase by reading it as a number, or sometimes by using an alphanumeric cipher. The letters of the alphabets involved have standar ...

'' used to designate the computation of the

calendar A calendar is a system of organizing days. This is done by giving names to periods of time, typically days, weeks, months and years. A calendar date, date is the designation of a single and specific day within such a system. A calendar is ...

. Probably this word represents a transposition of the Greek γραμματεία meaning "arithmetic, mathematics". Most of the observations of a scientific nature were transmitted by Samuel of Nehardea, who attended the schools of the Babylonians, and who claimed to possess as exact a knowledge of the heavenly regions as of the streets of Nehardea. Certain rules must nevertheless have existed, because Rabban Gamaliel (about 100), who applied the lunar tablets and telescope, relied for authority upon such as had been transmitted by his paternal ancestors.

Correspondence between Biblical numbers and astronomy

The number 7 is a recurring numerical theme in the Hebrew scriptures. The menorah's seven lamps on four branches correspond to the lights of the seven Classical planets: the Moon, Mercury, Venus, the Sun (4th), Mars, Jupiter, and Saturn. Hebrew mysticism recognized their great importance. Therefore, along with the four

lunar phases A lunar phase or Moon phase is the apparent shape of the Moon's directly sunlit portion as viewed from the Earth. Because the Moon is Tidal locking, tidally locked with the Earth, the same Hemisphere (geometry), hemisphere is always facing the ...

being slightly over seven days (~7.4 days) each, the number 7 was held in very high regard. The

Torah The Torah ( , "Instruction", "Teaching" or "Law") is the compilation of the first five books of the Hebrew Bible, namely the books of Genesis, Exodus, Leviticus, Numbers and Deuteronomy. The Torah is also known as the Pentateuch () ...

reflects this with Bereishit (

Book of Genesis The Book of Genesis (from Greek language, Greek ; ; ) is the first book of the Hebrew Bible and the Christian Old Testament. Its Hebrew name is the same as its incipit, first word, (In the beginning (phrase), 'In the beginning'). Genesis purpor ...

1:1) being seven words and twenty-eight letters (7x4) in its original Hebrew. This is "God's signature". Some scholars identified the 12 signs of the zodiac with the 12 sons of

Jacob Jacob, later known as Israel, is a Hebrew patriarch of the Abrahamic religions. He first appears in the Torah, where he is described in the Book of Genesis as a son of Isaac and Rebecca. Accordingly, alongside his older fraternal twin brother E ...

twelve tribes of Israel The Twelve Tribes of Israel ( , ) are described in the Hebrew Bible as being the descendants of Jacob, a Patriarchs (Bible), Hebrew patriarch who was a son of Isaac and thereby a grandson of Abraham. Jacob, later known as Israel (name), Israel, ...

Conceptions of the Heavens and Earth

In the Talmud, as in the Bible, the heavens and the Earth designate the two borders of the universe, with the heavens a covering over the Earth. One

tannaitic ''Tannaim'' ( Amoraic Hebrew: תנאים "repeaters", "teachers", singular ''tanna'' , borrowed from Aramaic) were the rabbinic sages whose views are recorded in the Mishnah, from approximately 10–220 CE. The period of the Tannaim, also refe ...

authority believed that the sphere consists of a strong and firm plate two or three fingers in thickness, always lustrous and never tarnishing, another estimates the diameter of this plate as one-sixth of the Sun's diurnal journey, while another, a Babylonian, estimates it at 1,000 parasangs (approx. 3728 miles). Yet another authority states that the diameter of the firmament is equal to the distance covered in 50 or 500 years and this is true also of the Earth and the large sea ( Tehom) upon which it rests. The distance of the firmament from the Earth is a journey of 500 years, a distance equivalent to the diameter of the firmament, through which the Sun must saw its way in order to become visible. The firmament, according to some, consists of fire and water, and, according to others, of water only, while the stars consist of fire. East and West are at least as far removed from each other as is the firmament from the Earth. Heaven and Earth "kiss each other" at the horizon and between the water above and that below there are but two or three fingerbreadths. The Earth rests upon water and is encompassed by it. According to other conceptions the Earth is supported by one, seven, or twelve pillars. These rest upon water, the water upon mountains, the mountains upon the wind, and the wind upon the storm, though this could easily be metaphoric. There is also mentioned the terrestrial globe, ''kaddur''.

Chronology and the Mazzaroth

Chronology Chronology (from Latin , from Ancient Greek , , ; and , ''wikt:-logia, -logia'') is the science of arranging events in their order of occurrence in time. Consider, for example, the use of a timeline or sequence of events. It is also "the deter ...

was a chief consideration in the study of astronomy among the Jews; sacred time was based upon the cycles of the Sun and the Moon. The Talmud identified the twelve constellations of the Mazzaroth (

) with the twelve months of the

Hebrew calendar The Hebrew calendar (), also called the Jewish calendar, is a lunisolar calendar used today for Jewish religious observance and as an official calendar of Israel. It determines the dates of Jewish holidays and other rituals, such as '' yahrze ...

. The correspondence of the constellations with their names in Hebrew and the months is as follows: # Aries - Ṭ'leh -

Nisan Nisan (or Nissan; from ) in the Babylonian and Hebrew calendars is the month of the barley ripening and first month of spring. The name of the month is an Akkadian language borrowing, although it ultimately originates in Sumerian ''nisag' ...

# Taurus - Shor -

Iyar Iyar (Hebrew language, Hebrew: or , Hebrew language#Modern Hebrew, Standard ''ʾĪyyar'' Tiberian vocalization, Tiberian ''ʾĪyyār''; from "Rosette (design), rosette; blossom") is the eighth month of the civil year (which starts on 1 Tishrei ...

# Gemini - Teomim - Sivan #

Cancer Cancer is a group of diseases involving Cell growth#Disorders, abnormal cell growth with the potential to Invasion (cancer), invade or Metastasis, spread to other parts of the body. These contrast with benign tumors, which do not spread. Po ...

- Sarṭan - Tammuz # Leo - Ari - Av #

Virgo Virgo may refer to: Arts and entertainment * Virgo (film), a 1970 Egyptian film * Virgo (character), several Marvel Comics characters * Virgo Asmita, a character in the manga ''Saint Seiya: The Lost Canvas'' * ''Virgo'' (album), by Virgo Four, ...

- Betulah -

Elul Elul (Hebrew language, Hebrew: , Hebrew language#Modern Hebrew, Standard , Tiberian vocalization, Tiberian ) is the twelfth month of the civil year and the sixth month of the Jewish religious year, religious year in the Hebrew calendar. It is a m ...

# Libra - Moznayim - Tishrei # Scorpio - 'Aḳrab -

Cheshvan Marcheshvan (Hebrew language, Hebrew: , Hebrew language#Modern Hebrew, Standard , Tiberian vocalization, Tiberian ; from Akkadian language, Akkadian , literally, 'eighth month'), generally shortened to Cheshvan (, Hebrew language#Modern Hebrew, S ...

# Sagittarius - Ḳeshet -

Kislev Kislev or Chislev (Hebrew language, Hebrew: , Hebrew language#Modern Hebrew, Standard ''Kīslev'' Tiberian vocalization, Tiberian ''Kīslēw''), is the third month of the civil year and the ninth month of the ecclesiastical year on the Hebrew c ...

# Capricorn - Gedi - Tevet # Aquarius - D'li - Shevat # Pisces - Dagim - Adar The first three are in the east, the second three in the south, the third three in the west, and the last three in the north; and all are attendant on the Sun. According to one account, in the first three months (spring) the Sun travels in the south, in order to melt the snow; in the fourth through sixth months (summer) it travels directly above the Earth, in order to ripen the fruit; in the seventh through ninth months (autumn) it travels above the sea, in order to absorb the waters; and in the last three months (winter) it travels over the desert, in order that the grain may not dry up and wither. According to one conception, Aries, Leo, and Sagittarius face northward; Taurus, Virgo, and Capricornus westward; Gemini, Libra, and Aquarius southward; and Cancer, Scorpio, and Pisces eastward. Some scholars identified the twelve signs of the zodiac with the

. The four solstices (the Tekufot of Nisan, Tammuz, Tishrei, and Tevet) are often mentioned as determining the seasons of the year and there are occasional references to the rising-place of the Sun. Sometimes six seasons of the year are mentioned, and reference is often made to the receptacle of the Sun (ναρθήκιον), by means of which the heat of the orb is mitigated. The Moon was also a part of the calendar: "The moon begins to shine on the 1st of the month; its light increases until the 15th, when the disk �סקוס (δίσκοσ)is full; from the 15th to the 30th it wanes; and on the 30th it is invisible."

The heavenly bodies and their motions

Two different cosmologies can be found in the Talmud. One is a flat Earth cosmology resembling descriptions of the world in the mythology of the

Ancient Near East The ancient Near East was home to many cradles of civilization, spanning Mesopotamia, Egypt, Iran (or Persia), Anatolia and the Armenian highlands, the Levant, and the Arabian Peninsula. As such, the fields of ancient Near East studies and Nea ...

. The other, is a

geocentric model In astronomy, the geocentric model (also known as geocentrism, often exemplified specifically by the Ptolemaic system) is a superseded scientific theories, superseded description of the Universe with Earth at the center. Under most geocentric m ...

, according to which the stars move about the earth. According to

Aristotle Aristotle (; 384–322 BC) was an Ancient Greek philosophy, Ancient Greek philosopher and polymath. His writings cover a broad range of subjects spanning the natural sciences, philosophy, linguistics, economics, politics, psychology, a ...

Ptolemy Claudius Ptolemy (; , ; ; – 160s/170s AD) was a Greco-Roman mathematician, astronomer, astrologer, geographer, and music theorist who wrote about a dozen scientific treatises, three of which were important to later Byzantine science, Byzant ...

, and other philosophers among the Greeks, the stars have no motion of their own, being firmly attached to spheres whose center is the Earth. A passage in the Talmud contrasts the pagan view with that of Jewish sages:

The learned of Israel say, "The sphere stands firm, and the planets revolve"; the learned of the nations say, "The sphere moves, and the planets stand firm." The learned of Israel say, "The sun moves by day beneath the firmament, and by night above the firmament"; the learned of the nations say, "The sun moves by day beneath the firmament, and by night beneath the earth."

The Sun has 365 windows through which it emerges; 182 in the east, 182 in the west, and 1 in the middle, the place of its first entrance. The course described by it in a year is traversed by the Moon in 30 days. The solar year is longer by 11 days than the lunar year. The Sun completes its course in 12 months; Jupiter, in 12 years; Saturn, in 30 years; Venus and Mars, in 480 years; however, an objection is raised here (in a gloss) against the last-mentioned number. King Antoninus asked the patriarch why the Sun rises in the east and sets in the west. At the time of the Deluge it traveled in the opposite direction. Every 28 years it returns to its original point of departure, and on Tuesday evening of the spring solstice it is in opposition with Saturn, although

Plato Plato ( ; Greek language, Greek: , ; born BC, died 348/347 BC) was an ancient Greek philosopher of the Classical Greece, Classical period who is considered a foundational thinker in Western philosophy and an innovator of the writte ...

maintained that the Sun and planets never return to the place whence they started. This is the cycle of 28 years. The

Moon The Moon is Earth's only natural satellite. It Orbit of the Moon, orbits around Earth at Lunar distance, an average distance of (; about 30 times Earth diameter, Earth's diameter). The Moon rotation, rotates, with a rotation period (lunar ...

-cycle of 19 years may have been meant in

Targum Pseudo-Jonathan Targum Pseudo-Jonathan (also known as the Jerusalem Targum, Targum Yerushalmi, or Targum Jonathan) is an Aramaic translation and interpretation (targum) of the Torah (Pentateuch) traditionally thought to have originated from the land of Israel, al ...

Genesis 1:14. The names of the five planets, one star and one moon lanetary satelliteare: * ''Shabtai'' שבתאי, Saturn ** Meaning: "of

Shabbat Shabbat (, , or ; , , ) or the Sabbath (), also called Shabbos (, ) by Ashkenazi Hebrew, Ashkenazim, is Judaism's day of rest on the seventh day of the seven-day week, week—i.e., Friday prayer, Friday–Saturday. On this day, religious Jews ...

" * ''Tzedeq'' צדק, Jupiter ** Meaning: "righteousness", as Jupiter is the embodiment of divine influx. * ''Ma'adim'' מאדים, Mars ** Meaning: "the red one" * ''Ḥammah'' חמה, the Sun ** Meaning: "the hot one" * ''Kokhevet'' כוכבת, ''Nogah'' נוגה or ''Kokhav-Nogah'' כוכב נוגה, Venus ** Meanings: "the she-planet", "the bright one", or "the bright planet", respectively * ''Kokhav'' כוכב, Mercury ** Meaning: "the planet", since Mercury is the Principle of planetary influence, in and of itself. The Mercurial principle is that of multiplorancy. It embodies our means of adaptation, and represents the many facets of existence. In being deemed simply as "the planet", Mercury is presented as a blank slate; an open-ended modality of being. * ''Levanah'' לבנה, the Moon ** Meaning: "the white one" In many languages, the names of the days of the week are derived from the names of the seven planets; each day was consecrated to the particular planet that ruled during the early hours of the morning. While Talmudists were familiar with the planets and their characteristics in

astrology Astrology is a range of Divination, divinatory practices, recognized as pseudoscientific since the 18th century, that propose that information about human affairs and terrestrial events may be discerned by studying the apparent positions ...

, they opposed their worship, so weekdays are not named in Hebrew besides for the Sabbath. Instead they are referred to by number.

Fixed stars and comets

The

Milky Way The Milky Way or Milky Way Galaxy is the galaxy that includes the Solar System, with the name describing the #Appearance, galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars in other arms of the galax ...

is called "Fire-Stream", a name borrowed from Daniel 7:10 (''Nehar di-nur''), where it may possibly have had the same signification. The statement is also made that the sting of Scorpio may be seen lying in the Milky Way.

Samuel Samuel is a figure who, in the narratives of the Hebrew Bible, plays a key role in the transition from the biblical judges to the United Kingdom of Israel under Saul, and again in the monarchy's transition from Saul to David. He is venera ...

said: "We have it as a tradition that no comet ever passed across the face of Orion "Kesil"; for if this should happen the earth would be destroyed." When his hearers objected to this statement, saying, "Yet we see that this occurs," Samuel replied: "It only appears so; for the comet passes either above or below the star. Possibly also its radiance passes, but not its body." Again, Samuel says: "But for the warmth of Orion, the earth could not exist, because of the frigidity of Scorpio; furthermore, Orion lies near Taurus, with which the warm season begins. The comet, because of its tail, is called ''kokba de-shabbiṭ''. (rodstar). Rabbi

Joshua ben Hananiah Joshua ben Hananiah ( ''Yəhōšūaʿ ben Ḥănanyā''; d. 131 CE), also known as Rabbi Yehoshua, was a leading tanna of the first half-century following the destruction of the Second Temple. He is the eighth-most-frequently mentioned sage in t ...

(about 100), declared that a star appears once every seventy years and leads mariners astray, hence they should at such time lay in a larger store of provisions. Rapoport endeavors to prove that the path of

Halley's comet Halley's Comet is the only known List of periodic comets, short-period comet that is consistently visible to the naked eye from Earth, appearing every 72–80 years, though with the majority of recorded apparitions (25 of 30) occurring after ...

had been computed by a wise rabbi. Samuel said: "I know all the paths of heaven, but nothing of the nature of the comet." The following Biblical names of constellations are mentioned and explained: כימה = כמאה.

(Biblically known as the Seven Stars) cluster ofabout a hundred stars, and for the much disputed עש, its equally obscure Aramaic equivalent יותא (MS. M. אתא), Syriac עיותא, is given.Berachot 58b

Post-Talmudic times

With the revival of Hellenistic astronomy which took place during the

Islamic Golden Age The Islamic Golden Age was a period of scientific, economic, and cultural flourishing in the history of Islam, traditionally dated from the 8th century to the 13th century. This period is traditionally understood to have begun during the reign o ...

, Jews were intimately connected, and the ''Almagest'' is said to have been translated by Ali ibn Sahl Rabban al-Tabari, Sahal ibn Tabari as early as AD 800, while one of the earliest independent students of astronomy among the Arabs was Mashallah ibn Athari (754-873?). Jews seem to have been particularly concerned with the formation of astronomical tables of practical utility to astronomers. Sind ben Ali (about 830) was one of the principal contributors to the tables drawn up under the patronage of the Caliph al-Mamun. No less than twelve Jews were concerned in the Tables of Toledo, drawn up about AD 1080 under the influence of Ahmad ibn Zaid, and the celebrated Alfonsine Tables were executed under the superintendence of Isaac ibn Sid, while Jews were equally concerned in the less-known tables of Peter IV of Aragon. Isaac ibn al-Ahdab, Isaac al-Ḥadib compiled astronomical tables from those of Al-Rakkam, Al-Battam, and Ibn al-Kammad. Joseph ibn Wakkar (1357) drew up tables of the period 720 (Heg.); while Mordecai Comtino and Mattathia Delacrut commented upon the Persian and Paris tables respectively; the latter were commented upon also by Farissol Botarel. Abraham ibn Ezra translated Al-Mattani's Canons of the Khwarizmi Tables, and in his introduction tells a remarkable story of a Jew in India who helped Yaʿqūb ibn Ṭāriq, Jacob ben Tarik to translate the Indian astronomical tables according to the Indian cycle of 432,000 years. Other tables were compiled by Jacob ben Makir, Emanuel ben Jacob, Jacob ben David ben Yom-Ṭob Poel (1361), Solomon ben Elijah (from the Persian tables), and Abraham Zacuto of Salamanca (about 1515). The earliest to treatise of astronomy in Hebrew on a systematic plan was Abraham bar Ḥiyya, who wrote at Marseilles, about AD 1134. Discussions on astronomical points, especially with regard to the spheres, and disputed points in calculating the calendar occur frequently in the works of Judah ha-Levi, Abraham ibn Ezra, and Maimonides, while a new system of astronomy is contained in the "Wars of the Lord" ("Milḥamot Adonai") of Levi ben Gershon. Jews were especially involved as translators. Moses ibn Tibbon translated from the Arabic Jabir ben Aflah's acute criticisms of the Ptolemaic system, an anticipation of Copernicus, and thus brought them to the notice of Maimonides. Alhazen, Ibn al-Haitham's Arabic compendium of astronomy was a particular favorite of Jewish astronomers; besides being translated into Spanish by Don Abraham Faquin, it was turned into Hebrew by Jacob ben Makir and Solomon ibn Pater Cohen and into Latin by Abraham de Balmes. Other translations from the Arabic were by Jacob Anatoli, Moses Galeno, and Kalonymus ben Kalonymus, bringing the Greco-Arabic astronomers to the notice of western Europe. Jacob Anatoli, for example, translated into Hebrew both the ''Almagest'' and Averroes' compendium of it, and this Hebrew version was itself translated into Latin by Jacob Christmann. Other translators from the Hebrew into Latin were Abraham de Balmes and Kalonymus ben David of Naples, while David Kalonymus ben Jacob, Ephraim Mizraḥi, and Solomon Abigdor translated from the Latin into Hebrew. The well-known family of translators, the Ibn Tibbons, may be especially mentioned. In practical astronomy Jewish work was even more effective. Jacob ben Makir (who is known also as Profiat Tibbon) appears to have been professor of astronomy at Montpellier, about 1300, and to have invented a quadrant to serve as a substitute for the astrolabe. Levi ben Gershon was also the inventor of an astronomical instrument, and is often quoted with respect under the name of Leon de Bañolas. Bonet de Lattes also invented an astronomical ring. Abraham Zacuto ben Samuel was professor of astronomy at Salamanca, and afterward astronomer-royal to Manuel I of Portugal, Emmanuel of Portugal, who had previously been advised by a Jewish astronomer, Rabbi Joseph Vecinho, a pupil of Abraham Zacuto, as to the project put before him by Christopher Columbus, who, in carrying it out, made use of Zacuto's "Almanac" and "Tables". With the Renaissance, Jewish work in astronomy lost in importance, as Europe could refer to the Greek astronomers without it. The chief name connected with of astronomical studies in this period is that of David Gans of Prague (d. 1613), who corresponded with Kepler and Tycho Brahe. He was acquainted with the Copernican system, but preferred that of Ptolemy, while as late as 1714 David Nieto of London still stood out against the Copernican system. Other Jewish astronomers of note are H. Goldschmidt (1802–1866), who discovered 14 asteroids. Wilhelm Beer (1797–1850), the brother of Meyer Beer, drew one of the most accurate maps of the moon of his time. Moritz Loewy (b. 1833) was director of the Paris Observatory, and the inventor of the coudé or elbow telescope, by which the stars may be observed without bending the neck back and without leaving the comfortable observatory. is the official Hebrew name for the planet Neptune (planet), Neptune in a vote organised by the Academy of the Hebrew Language in 2009."Uranus and Neptune get Hebrew names at last"
Haaretz.com"Hebrew names to Uranus and Neptune"
Hayadan.org.il

References

*In the Bible **Gunkel's ''Commentary on Genesis'' (Nowack Series) may be consulted for incidental references to Biblical Astronomy; **for the Babylonian views, see Jensen, ''Kosmologie der Babylonier'', Strasburg, 1890, passim; **Morris Jastrow, Jr., Jastrow, ''Religion of Babylonia and Assyria'', xx.-xxii.; **Joseph Epping and Johann Nepomuk Strassmaier, ''Astronomisches aus Babylon'', Freiburg, 1889.J. Jr. P. J. *In the Talmud **Winer, B. R. ii. 526–529, Leipsic, 1848; **Hamburger, R. B. T. ii. 77–81, s.v. J. Sr. L. B. *"Astronomy", ''Encyclopaedia Judaica''. Jerusalem: Encyclopaedia Judaica & New York: Macmillan, 1971–72. 3:795-807. *Tzvi Langermann, Langermann, Y. Tzvi. "Hebrew Astronomy: Deep Soundings from a Rich Tradition". In ''Astronomy Across Cultures: The History of Non-Western Astronomy'', ed. Helaine Selin, 555–84. Dordrecht: Kluwer Academic Publishers, 2000.
Jewish Astronomy/Astrology

Notes

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