SettingsHistory of astronomy
A Passage to Infinity
A Passage to Infinity : Medieval Indian Mathematics from Kerala and Its Impact is a book by George Gheverghese Joseph chronicling the social and mathematical origins of the Kerala school ...
A Passage to Infinity : Medieval Indian Mathematics from Kerala and Its Impact is a book by George Gheverghese Joseph chronicling the social and mathematical origins of the Kerala school ...
Aerial telescope
An aerial telescope is a type of very-long-focal-length refracting telescope built in the second half of the 17th century that did not use a tube.
An aerial telescope is a type of very-long-focal-length refracting telescope built in the second half of the 17th century that did not use a tube.
Almagest
The Almagest is a 2nd-century mathematical and astronomical treatise on the apparent motions of the stars and planetary paths.
The Almagest is a 2nd-century mathematical and astronomical treatise on the apparent motions of the stars and planetary paths.
Antikythera mechanism
The Antikythera mechanism ( or ) is an ancient mechanical computer designed to calculate astronomical positions.
The Antikythera mechanism ( or ) is an ancient mechanical computer designed to calculate astronomical positions.
Archaeoastronomy
Archaeoastronomy is the study of how people in the past "have understood the phenomena in the sky, how they used phenomena in the sky, and what role the sky played in their cultures."
Archaeoastronomy is the study of how people in the past "have understood the phenomena in the sky, how they used phenomena in the sky, and what role the sky played in their cultures."
Armillary sphere
An armillary sphere is a model of objects in the sky, consisting of a spherical framework of rings, centred on Earth, that represent lines of celestial longitude and latitude and other astronomi...
An armillary sphere is a model of objects in the sky, consisting of a spherical framework of rings, centred on Earth, that represent lines of celestial longitude and latitude and other astronomi...
Astrarium
An astrarium, also called a planetarium, is the mechanical representation of the cyclic nature of astronomical objects in one timepiece.
An astrarium, also called a planetarium, is the mechanical representation of the cyclic nature of astronomical objects in one timepiece.
Astrolabe
An astrolabe is an elaborate inclinometer, historically used by astronomers, navigators, and astrologers.
An astrolabe is an elaborate inclinometer, historically used by astronomers, navigators, and astrologers.
Astrology and astronomy
Astrology and astronomy were archaically one and the same discipline (astrologia), and were only gradually recognized as separate in Western 17th century philosophy (the "Age of Reason").
Astrology and astronomy were archaically one and the same discipline (astrologia), and were only gradually recognized as separate in Western 17th century philosophy (the "Age of Reason").
Astronomia nova
The Astronomia nova is a book, published in 1609, that contains the results of the astronomer Johannes Kepler's ten-year long investigation of the motion of Mars.
The Astronomia nova is a book, published in 1609, that contains the results of the astronomer Johannes Kepler's ten-year long investigation of the motion of Mars.
Astronomical clock
An astronomical clock is a clock with special mechanisms and dials to display astronomical information, such as the relative positions of the sun, moon, zodiacal constellations, and sometimes ...
An astronomical clock is a clock with special mechanisms and dials to display astronomical information, such as the relative positions of the sun, moon, zodiacal constellations, and sometimes ...
Astronomical complex
An astronomical complex or commemorative astronomical complex is a series of man-made structures with an astronomical purposes.
An astronomical complex or commemorative astronomical complex is a series of man-made structures with an astronomical purposes.
Astronomical rings
Astronomical rings (Latin: annuli astronomici), also known as Gemma's rings, are an early astronomical instrument.
Astronomical rings (Latin: annuli astronomici), also known as Gemma's rings, are an early astronomical instrument.
Astronomische Nachrichten
Astronomische Nachrichten (Astronomical Notes), one of the first international journals in the field of astronomy, was founded in 1821 by the German astronomer Heinrich Christian Schumacher.
Astronomische Nachrichten (Astronomical Notes), one of the first international journals in the field of astronomy, was founded in 1821 by the German astronomer Heinrich Christian Schumacher.
Astronomy and religion
Astronomy and religion have long been closely intertwined with one another, particularly during the early period in the development of astronomy.
Astronomy and religion have long been closely intertwined with one another, particularly during the early period in the development of astronomy.
Astronomy in medieval Islam
Islamic astronomy or Arabic astronomy comprises the astronomical developments made in the Islamic world, particularly during the Islamic Golden Age, and mostly written in the Arabic language.
Islamic astronomy or Arabic astronomy comprises the astronomical developments made in the Islamic world, particularly during the Islamic Golden Age, and mostly written in the Arabic language.
Australian Aboriginal astronomy
Australian Aboriginal astronomy is a name given to indigenous Australian culture relating to astronomical subjects — such as the Sun and Moon, the stars, planets, and the Milky Way, and their mo...
Australian Aboriginal astronomy is a name given to indigenous Australian culture relating to astronomical subjects — such as the Sun and Moon, the stars, planets, and the Milky Way, and their mo...
Callippic cycle
In astronomy and calendar studies, the Callippic cycle is a particular approximate common multiple of the year and the synodic month, that was proposed by Callippus in 330 BC. It is a period of ...
In astronomy and calendar studies, the Callippic cycle is a particular approximate common multiple of the year and the synodic month, that was proposed by Callippus in 330 BC. It is a period of ...
Candravakyas
Candravākyās are a collection of numbers, arranged in the form of a list, related to the motion of the Moon in its orbit around the Earth.
Candravākyās are a collection of numbers, arranged in the form of a list, related to the motion of the Moon in its orbit around the Earth.
Carte du Ciel
The Carte du Ciel and the Astrographic Catalogue were two distinct but connected components of a massive international astronomical project, initiated in the late 19th century, to catalogu...
The Carte du Ciel and the Astrographic Catalogue were two distinct but connected components of a massive international astronomical project, initiated in the late 19th century, to catalogu...
Celestial spheres
The celestial spheres, or celestial orbs, were the fundamental entities of the cosmological models developed by Plato, Eudoxus, Aristotle, Ptolemy, Copernicus and others.
The celestial spheres, or celestial orbs, were the fundamental entities of the cosmological models developed by Plato, Eudoxus, Aristotle, Ptolemy, Copernicus and others.
Cheonsang Yeolcha Bunyajido
Cheonsang Yeolcha Bunyajido is a 14th century Korean star map, copies of which were spread nationwide in the Joseon Dynasty.
Cheonsang Yeolcha Bunyajido is a 14th century Korean star map, copies of which were spread nationwide in the Joseon Dynasty.
Chinese astronomy
Astronomy in China has a very long history, with historians considering that "they the Chinese
Were the most persistent and accurate observers of celestial phenomena anywhere in the world befo...
Astronomy in China has a very long history, with historians considering that "they the Chinese
Were the most persistent and accurate observers of celestial phenomena anywhere in the world befo...
Classical planet
In antiquity the classical planets were the non-fixed objects visible in the sky, known to various ancient cultures.
In antiquity the classical planets were the non-fixed objects visible in the sky, known to various ancient cultures.
Colonial American Astronomy
Colonial American Astronomy can be traced to the time when the English began colonizing in the New World during the sixteenth century.
Colonial American Astronomy can be traced to the time when the English began colonizing in the New World during the sixteenth century.
Copernican heliocentrism
Copernican heliocentrism is the name given to the astronomical model developed by Nicolaus Copernicus and published in 1543.
Copernican heliocentrism is the name given to the astronomical model developed by Nicolaus Copernicus and published in 1543.
Copernican Revolution
The Copernican Revolution refers to the paradigm shift away from the Ptolemaic model of the heavens, which postulated the Earth at the center of the universe, towards the heliocentric model with...
The Copernican Revolution refers to the paradigm shift away from the Ptolemaic model of the heavens, which postulated the Earth at the center of the universe, towards the heliocentric model with...
Cracovian
In astronomical and geodedic calculations, Cracovians are a clerical convenience introduced in the 1930s for solving systems of linear equations by hand.
In astronomical and geodedic calculations, Cracovians are a clerical convenience introduced in the 1930s for solving systems of linear equations by hand.
Cultural astronomy
Cultural astronomy is a blanket term used to describe interdisciplinary fields that relate to astronomical systems of current or ancient societies and cultures.
Cultural astronomy is a blanket term used to describe interdisciplinary fields that relate to astronomical systems of current or ancient societies and cultures.
De revolutionibus orbium coelestium
De revolutionibus orbium coelestium (On the Revolutions of the Heavenly Spheres) is the seminal work on the heliocentric theory of the Renaissance astronomer Nicolaus Copernicus (1473–1543).
De revolutionibus orbium coelestium (On the Revolutions of the Heavenly Spheres) is the seminal work on the heliocentric theory of the Renaissance astronomer Nicolaus Copernicus (1473–1543).
Deferent and epicycle
In the Ptolemaic system of astronomy, the epicycle was a geometric model used to explain the variations in speed and direction of the apparent motion of the Moon, Sun, and planets.
In the Ptolemaic system of astronomy, the epicycle was a geometric model used to explain the variations in speed and direction of the apparent motion of the Moon, Sun, and planets.
Definition of planet
The definition of planet, since the word was coined by the ancient Greeks, has included within its scope a wide range of celestial bodies.
The definition of planet, since the word was coined by the ancient Greeks, has included within its scope a wide range of celestial bodies.
Dialogue Concerning the Two Chief World Systems
The Dialogue Concerning the Two Chief World Systems (Dialogo sopra i due massimi sistemi del mondo) was a 1632 Italian language book by Galileo Galilei comparing the Copernican system wi...
The Dialogue Concerning the Two Chief World Systems (Dialogo sopra i due massimi sistemi del mondo) was a 1632 Italian language book by Galileo Galilei comparing the Copernican system wi...
Discovery of Neptune
The discovery of Neptune led to the discovery of its moon Triton by William Lassell just seventeen days later.
The discovery of Neptune led to the discovery of its moon Triton by William Lassell just seventeen days later.
Dynamics of the celestial spheres
Ancient, medieval and Renaissance astronomers and philosophers developed many different theories about the dynamics of the celestial spheres.
Ancient, medieval and Renaissance astronomers and philosophers developed many different theories about the dynamics of the celestial spheres.
Einstein's unsuccessful investigations
Einstein's unsuccessful investigations are in addition to his life's work.
Einstein's unsuccessful investigations are in addition to his life's work.
Empyrean
Empyrean, from the Medieval Latin empyreus, and late latin empyrius, an adaptation of the Ancient Greek ἔμπυρος empyrus "in or on the fire", properly Empyrean Heaven, is the ...
Empyrean, from the Medieval Latin empyreus, and late latin empyrius, an adaptation of the Ancient Greek ἔμπυρος empyrus "in or on the fire", properly Empyrean Heaven, is the ...
Equant
Equant (or punctum aequans) is a mathematical concept developed by Claudius Ptolemy in the 2nd century AD to account for the observed motion of heavenly bodies.
Equant (or punctum aequans) is a mathematical concept developed by Claudius Ptolemy in the 2nd century AD to account for the observed motion of heavenly bodies.
Fifth planet (hypothetical)
In the history of astronomy, a handful of solar system bodies have been counted as the fifth planet from the sun.
In the history of astronomy, a handful of solar system bodies have been counted as the fifth planet from the sun.
Filar micrometer
A filar micrometer is a device used in astronomical telescopes for astrometry measurements.
A filar micrometer is a device used in astronomical telescopes for astrometry measurements.
Fixed stars
The fixed stars (from the Latin stellae fixae) are celestial objects that do not seem to move in relation to the other stars of the night sky.
The fixed stars (from the Latin stellae fixae) are celestial objects that do not seem to move in relation to the other stars of the night sky.
Floating collimator
Floating collimator was an early collimator widely used in astronomical observations.
Floating collimator was an early collimator widely used in astronomical observations.
Galactocentrism
In astronomy, Galactocentrism is the theory that our sun is at or near the center of the galaxy.
In astronomy, Galactocentrism is the theory that our sun is at or near the center of the galaxy.
Galileo affair
The Galileo affair was a sequence of events, beginning around 1610, during which Galileo Galilei came into conflict with the Aristotelian scientific view of the universe (supported by the Catho...
The Galileo affair was a sequence of events, beginning around 1610, during which Galileo Galilei came into conflict with the Aristotelian scientific view of the universe (supported by the Catho...
Gerald J. Toomer
Gerald James Toomer (born 23 November 1934 in Aldershot, Hampshire) is a historian of astronomy and mathematics who has written numerous books and papers on ancient Greek and medieval Islamic as...
Gerald James Toomer (born 23 November 1934 in Aldershot, Hampshire) is a historian of astronomy and mathematics who has written numerous books and papers on ancient Greek and medieval Islamic as...
Govinda Bhattathiri
Govinda Bhaṭṭatiri (also known as Govinda Bhattathiri of Thalakkulam or Thalkkulathur) (1237 – 1295 CE ) was an Indian astrologer and astronomer who flourished in Kerala during the ...
Govinda Bhaṭṭatiri (also known as Govinda Bhattathiri of Thalakkulam or Thalkkulathur) (1237 – 1295 CE ) was an Indian astrologer and astronomer who flourished in Kerala during the ...
Great Debate (astronomy)
In astronomy, the Great Debate, also called the Shapley–Curtis Debate, was an influential debate between the astronomers Harlow Shapley and Heber Curtis which concerned the nature of spira...
In astronomy, the Great Debate, also called the Shapley–Curtis Debate, was an influential debate between the astronomers Harlow Shapley and Heber Curtis which concerned the nature of spira...
Great Year
The Great Year is an archaic cosmological conception, found in different cultures, which acquired new interpretations with the development of astronomical knowledge In the Western tradition Pl...
The Great Year is an archaic cosmological conception, found in different cultures, which acquired new interpretations with the development of astronomical knowledge In the Western tradition Pl...
Greek astronomy
Greek astronomy refers to astronomy written in the Greek language in classical antiquity.
Greek astronomy refers to astronomy written in the Greek language in classical antiquity.
Haridatta
Haridatta (ca. 683 CE) was an astronomer-mathematician of Kerala, India, who is believed to be the promulgator of the Parahita system of astronomical computations.
Haridatta (ca. 683 CE) was an astronomer-mathematician of Kerala, India, who is believed to be the promulgator of the Parahita system of astronomical computations.
Hebrew astronomy
Hebrew astronomy refers to any astronomy written in Hebrew or by Hebrew speakers, or translated into Hebrew.
Hebrew astronomy refers to any astronomy written in Hebrew or by Hebrew speakers, or translated into Hebrew.
Heliocentrism
Heliocentrism, or heliocentricism, is the astronomical model in which the Earth and planets revolve around a relatively stationary Sun at the center of the Solar System.
Heliocentrism, or heliocentricism, is the astronomical model in which the Earth and planets revolve around a relatively stationary Sun at the center of the Solar System.
Helisaeus Roeslin
Helisaeus Roeslin (1544–1616) was a German physician and astrologer who adopted a geoheliocentric model of the universe.
Helisaeus Roeslin (1544–1616) was a German physician and astrologer who adopted a geoheliocentric model of the universe.
Hellenistic astrology
Hellenistic astrology is a tradition of horoscopic astrology that was developed and practiced in Hellenistic Egypt and the Mediterranean, whose texts were written in Greek, mainly around the lat...
Hellenistic astrology is a tradition of horoscopic astrology that was developed and practiced in Hellenistic Egypt and the Mediterranean, whose texts were written in Greek, mainly around the lat...
Historical astronomy
Historical astronomy is the science of analysing historic astronomical data.
Historical astronomy is the science of analysing historic astronomical data.
History of astrology
The history of astrology can be traced back to the earliest phases of Babylonian history, in the third millennium BCE.
The history of astrology can be traced back to the earliest phases of Babylonian history, in the third millennium BCE.
History of astronomy
Astronomy is the oldest of the natural sciences, dating back to antiquity, with its origins in the religious, mythological, and astrological practices of pre-history: vestiges of these are still...
Astronomy is the oldest of the natural sciences, dating back to antiquity, with its origins in the religious, mythological, and astrological practices of pre-history: vestiges of these are still...
History of gamma-ray burst research
The history of gamma-ray burst research began with the serendipitous detection of a gamma-ray burst (GRB) on July 2, 1967 by the U.S. Vela satellites.
The history of gamma-ray burst research began with the serendipitous detection of a gamma-ray burst (GRB) on July 2, 1967 by the U.S. Vela satellites.
History of Mars observation
The history of Mars observation dates back to the era of the ancient Egyptian astronomers.
The history of Mars observation dates back to the era of the ancient Egyptian astronomers.
History of supernova observation
The known history of supernova observation goes back to 185 CE, when supernova SN 185 appeared, the oldest appearance of a supernova recorded by humankind.
The known history of supernova observation goes back to 185 CE, when supernova SN 185 appeared, the oldest appearance of a supernova recorded by humankind.
History of the Big Bang theory
The history of the Big Bang theory began with the Big Bang's development from observations and theoretical considerations.
The history of the Big Bang theory began with the Big Bang's development from observations and theoretical considerations.
History of the Center of the Universe
The Center of the Universe is a concept that lacks a coherent definition within modern Astronomy.
The Center of the Universe is a concept that lacks a coherent definition within modern Astronomy.
Honcheonsigye
The Honcheonsigye is an astronomical clock created by Song I-yeong in 1669.
The Honcheonsigye is an astronomical clock created by Song I-yeong in 1669.
Indian astronomy
Historical Indian astronomy develops as a discipline of Vedanga or one of the "auxiliary disciplines" associated with the study of the Vedas.
Historical Indian astronomy develops as a discipline of Vedanga or one of the "auxiliary disciplines" associated with the study of the Vedas.
Jacob's staff
The term Jacob's staff, also cross-staff, a ballastella, a fore-staff, or a balestilha, is used to refer to several things.
The term Jacob's staff, also cross-staff, a ballastella, a fore-staff, or a balestilha, is used to refer to several things.
Jyotirmimamsa
Jyotirmimamsa (analysis of astronomy) is a treatise on the methodology of astronomical studies authored by Nilakantha Somayaji (1444–1544) in around 1504 CE. Nilakantha somayaji was an important...
Jyotirmimamsa (analysis of astronomy) is a treatise on the methodology of astronomical studies authored by Nilakantha Somayaji (1444–1544) in around 1504 CE. Nilakantha somayaji was an important...
Kerala school of astronomy and mathematics
The Kerala school of astronomy and mathematics was a school of mathematics and astronomy founded by Madhava of Sangamagrama in Kerala, South India, which included among its members: Parameshvara...
The Kerala school of astronomy and mathematics was a school of mathematics and astronomy founded by Madhava of Sangamagrama in Kerala, South India, which included among its members: Parameshvara...
Lost lands
Lost lands can be continents, islands or other regions supposedly existing during prehistory, having since disappeared as a result of catastrophic geological phenomena or slowly rising sea level...
Lost lands can be continents, islands or other regions supposedly existing during prehistory, having since disappeared as a result of catastrophic geological phenomena or slowly rising sea level...
Luminary (astrology)
The luminaries were what traditional astrologers called the two astrological "planets" which were the brightest and most important objects in the heavens, that is, the Sun and the Moon.
The luminaries were what traditional astrologers called the two astrological "planets" which were the brightest and most important objects in the heavens, that is, the Sun and the Moon.
Madhava series
In mathematics, a Madhava series is any one of the series in a collection of infinite series expressions all of which are believed to have been discovered by Sangamagrama Madhava (c. 1350 ...
In mathematics, a Madhava series is any one of the series in a collection of infinite series expressions all of which are believed to have been discovered by Sangamagrama Madhava (c. 1350 ...
Manuel Dias (Yang MaNuo)
Father Manuel Dias (Yang MaNuo), (Castelo Branco 1574 – China, March 4, 1659) also known as Emanuel Diaz, was a Portuguese Jesuit missionary who introduced for the first time in China the...
Father Manuel Dias (Yang MaNuo), (Castelo Branco 1574 – China, March 4, 1659) also known as Emanuel Diaz, was a Portuguese Jesuit missionary who introduced for the first time in China the...
Maya calendar
The Maya calendar is a system of calendars used in pre-Columbian Mesoamerica, and in many modern communities in highland Guatemala and in Veracruz, Oaxaca and Chiapas, Mexico.
The Maya calendar is a system of calendars used in pre-Columbian Mesoamerica, and in many modern communities in highland Guatemala and in Veracruz, Oaxaca and Chiapas, Mexico.
Musica universalis
Musica universalis (lit. universal music, or music of the spheres) is an ancient philosophical concept that regards proportions in the movements of celestial bodies—the Sun, Moon, an...
Musica universalis (lit. universal music, or music of the spheres) is an ancient philosophical concept that regards proportions in the movements of celestial bodies—the Sun, Moon, an...
Mysterium Cosmographicum
Mysterium Cosmographicum, (lit The Cosmographic Mystery, alternately translated Cosmic Mystery, The Secret of the World or some variation) is an astronomy book by the Germa...
Mysterium Cosmographicum, (lit The Cosmographic Mystery, alternately translated Cosmic Mystery, The Secret of the World or some variation) is an astronomy book by the Germa...
Names of the days of the week
Days of the week from the Roman period have been both named after the seven planets of classical astronomy and numbered, beginning with Sunday.
Days of the week from the Roman period have been both named after the seven planets of classical astronomy and numbered, beginning with Sunday.
Nebular hypothesis
In cosmogony, the nebular hypothesis is the most widely accepted model explaining the formation and evolution of the Solar System.
In cosmogony, the nebular hypothesis is the most widely accepted model explaining the formation and evolution of the Solar System.
Nicolaus Copernicus
Nicolaus Copernicus (Nikolaus Kopernikus; Nicolò Copernico; Mikołaj Kopernik; in his youth, Niclas Koppernigk; 19 February 1473 – 24 May 1543) was a Renaissance astronomer and the first pers...
Nicolaus Copernicus (Nikolaus Kopernikus; Nicolò Copernico; Mikołaj Kopernik; in his youth, Niclas Koppernigk; 19 February 1473 – 24 May 1543) was a Renaissance astronomer and the first pers...
Out of the Ordinary Festival
Out of the Ordinary Festival is a family and eco friendly festival near Hailsham- Grid reference TQ 569 088) in the Sussex countryside.
Out of the Ordinary Festival is a family and eco friendly festival near Hailsham- Grid reference TQ 569 088) in the Sussex countryside.
Passemant Astronomical clock
The Passemant Astronomical clock is an astronomical clock designed by Claude-Simeon Passemant in the eighteenth century.
The Passemant Astronomical clock is an astronomical clock designed by Claude-Simeon Passemant in the eighteenth century.
Passemant astronomical clock
The Passemant astronomical clock is an astronomical clock designed by Claude-Simeon Passemant in the eighteenth century.
The Passemant astronomical clock is an astronomical clock designed by Claude-Simeon Passemant in the eighteenth century.
Patronage in astronomy
Patronage in Astronomy is an approach which one can use to examine the history of astronomy from a cultural standpoint.
Patronage in Astronomy is an approach which one can use to examine the history of astronomy from a cultural standpoint.
Personal equation
The personal equation, in 19th- and early 20th-century science, referred to the idea that every individual observer had an inherent bias when it came to measurements and observations.
The personal equation, in 19th- and early 20th-century science, referred to the idea that every individual observer had an inherent bias when it came to measurements and observations.
Phaeton (hypothetical planet)
Phaeton (or Phaëton, less often Phaethon) is the name of a hypothetical planet posited to once have existed between the orbits of Mars and Jupiter whose destruction supposedly led to...
Phaeton (or Phaëton, less often Phaethon) is the name of a hypothetical planet posited to once have existed between the orbits of Mars and Jupiter whose destruction supposedly led to...
Planets in astrology
Planets in astrology have a meaning different from the modern astronomical understanding of what a planet is.
Planets in astrology have a meaning different from the modern astronomical understanding of what a planet is.
Portingbury Hills
Portingbury Hills or Portingbury Rings is a hill in Hatfield Forest, Little Hallingbury, Hatfield Broad Oak suggested to date to the Iron Age or Bronze Age.
Portingbury Hills or Portingbury Rings is a hill in Hatfield Forest, Little Hallingbury, Hatfield Broad Oak suggested to date to the Iron Age or Bronze Age.
Prague Astronomical Clock
The Prague Astronomical Clock or Prague Orloj is a medieval astronomical clock located in Prague, the capital of the Czech Republic, at.
The Prague Astronomical Clock or Prague Orloj is a medieval astronomical clock located in Prague, the capital of the Czech Republic, at.
Pretelescopic astronomy
Pretelescopic astronomy is the science of observing celestial objects with the naked eye.
Pretelescopic astronomy is the science of observing celestial objects with the naked eye.
Primum Mobile
In medieval and Renaissance astronomy, the Primum Mobile, or "first moved," was the outermost moving sphere in the geocentric model of the universe.
In medieval and Renaissance astronomy, the Primum Mobile, or "first moved," was the outermost moving sphere in the geocentric model of the universe.
Ptolemy's table of chords
The table of chords, created by the astronomer and geometer Ptolemy in Egypt during the 2nd century AD, is a trigonometric table in Book I, chapter 11 of Ptolemy's Almagest, ...
The table of chords, created by the astronomer and geometer Ptolemy in Egypt during the 2nd century AD, is a trigonometric table in Book I, chapter 11 of Ptolemy's Almagest, ...
Regiment of the North Pole
The Regiment of the North Pole, an outdated astronomy term, is a rule saying how to find the celestial North Pole by the stars.
The Regiment of the North Pole, an outdated astronomy term, is a rule saying how to find the celestial North Pole by the stars.
Savilian Professor of Astronomy
The Savilian Chair of Astronomy at the University of Oxford in England was founded in 1619 and is named after Sir Henry Savile.
The Savilian Chair of Astronomy at the University of Oxford in England was founded in 1619 and is named after Sir Henry Savile.
Scaphe
The scaphe (or skaphe, also scaphium or scaphion) was a sundial said to have been invented by Aristarchus (3rd century BC).
The scaphe (or skaphe, also scaphium or scaphion) was a sundial said to have been invented by Aristarchus (3rd century BC).
Sextant (astronomical)
Sextants for astronomical observations were used primarily for measuring the positions of stars.
Sextants for astronomical observations were used primarily for measuring the positions of stars.
Shadow square
The shadow square, also known as an altitude scale, was an instrument used to determine the linear height of an object, in conjunction with the alidade, for angular observations.
The shadow square, also known as an altitude scale, was an instrument used to determine the linear height of an object, in conjunction with the alidade, for angular observations.
Sidera Lodoicea
Sidera Lodoicea is the name given by the astronomer Giovanni Domenico Cassini to the four moons of Saturn discovered by him in the years 1671, 1672, and 1684 and published in his Découverte de...
Sidera Lodoicea is the name given by the astronomer Giovanni Domenico Cassini to the four moons of Saturn discovered by him in the years 1671, 1672, and 1684 and published in his Découverte de...
Somnium (novel)
Somnium (Latin for "The Dream") is a fantasy written between 1620 and 1630, in Latin, by Johannes Kepler.
Somnium (Latin for "The Dream") is a fantasy written between 1620 and 1630, in Latin, by Johannes Kepler.
Spherical Earth
The concept of a spherical Earth dates back to ancient Greek philosophy from around the 6th century BC, but remained a matter of philosophical speculation until the 3rd century BC when...
The concept of a spherical Earth dates back to ancient Greek philosophy from around the 6th century BC, but remained a matter of philosophical speculation until the 3rd century BC when...
Sublunary sphere
The sublunary sphere is a concept derived from Greek astronomy.
The sublunary sphere is a concept derived from Greek astronomy.
The Assayer
The Assayer (Il Saggiatore in Italian) was a book published in Rome by Galileo Galilei in October 1623.
The Assayer (Il Saggiatore in Italian) was a book published in Rome by Galileo Galilei in October 1623.
The Great Debate
In astronomy, the Great Debate, also called the Shapley–Curtis Debate, was an influential debate between the astronomers Harlow Shapley and Heber Curtis which concerned the nature of spira...
In astronomy, the Great Debate, also called the Shapley–Curtis Debate, was an influential debate between the astronomers Harlow Shapley and Heber Curtis which concerned the nature of spira...
The Man in the Moone
The Man in the Moone is a book by the English divine and bishop Francis Godwin (1562–1633).
The Man in the Moone is a book by the English divine and bishop Francis Godwin (1562–1633).
Timeline of astronomy
Timeline of Smelliness __NOTOC__ Many ancient sites are thought to have astronomical significance, such as the Ancient Egyptian pyramids, Harappan shell instruments, British megaliths, and build...
Timeline of Smelliness __NOTOC__ Many ancient sites are thought to have astronomical significance, such as the Ancient Egyptian pyramids, Harappan shell instruments, British megaliths, and build...
Treatise on the Astrolabe
A Treatise on the Astrolabe is a medieval essay on the astrolabe by Geoffrey Chaucer.
A Treatise on the Astrolabe is a medieval essay on the astrolabe by Geoffrey Chaucer.
Trepidation (astronomy)
According to a medieval theory of astronomy, trepidation is oscillation in the precession of the equinoxes.
According to a medieval theory of astronomy, trepidation is oscillation in the precession of the equinoxes.
Triquetrum (astronomy)
The triquetrum was the medieval name for an ancient astronomical instrument first described by Ptolemy in the Almagest.
The triquetrum was the medieval name for an ancient astronomical instrument first described by Ptolemy in the Almagest.
Tychonic system
The Tychonic system (or Tychonian system) was a model of the solar system published by Tycho Brahe in the late 16th century which combined what he saw as the mathematical benefits of the C...
The Tychonic system (or Tychonian system) was a model of the solar system published by Tycho Brahe in the late 16th century which combined what he saw as the mathematical benefits of the C...
Venvaroha
Veṇvāroha is a work in Sanskrit composed by Mādhava of Sangamagrāma the founder of the Kerala school of astronomy and mathematics.
Veṇvāroha is a work in Sanskrit composed by Mādhava of Sangamagrāma the founder of the Kerala school of astronomy and mathematics.
Wandlebury Enigma
The Wandlebury Enigma refers to a number of suggested hypotheses about the purpose, function and decoration of Wandlebury Hill.
The Wandlebury Enigma refers to a number of suggested hypotheses about the purpose, function and decoration of Wandlebury Hill.
Week-day names
The names of the days of the week from the Roman period have been both named after the seven planets of classical astronomy and numbered, beginning with Sunday.
The names of the days of the week from the Roman period have been both named after the seven planets of classical astronomy and numbered, beginning with Sunday.
Weekday names
The names of the days of the week from the Roman period have been both named after the seven planets of classical astronomy and numbered, beginning with Sunday.
The names of the days of the week from the Roman period have been both named after the seven planets of classical astronomy and numbered, beginning with Sunday.
Welteislehre
Welteislehre (World Ice Theory), also known as Glazial-Kosmogonie (Glacial Cosmogony) is a cosmological theory proposed by Hans Hörbiger, an Austrian engineer and inventor.
Welteislehre (World Ice Theory), also known as Glazial-Kosmogonie (Glacial Cosmogony) is a cosmological theory proposed by Hans Hörbiger, an Austrian engineer and inventor.