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Two objects on opposite sides of the celestial sphere
In positional astronomy, two astronomical objects are said to be in opposition when they are on opposite sides of the celestial sphere, as observed from
Opposition_(astronomy)
Topics referred to by the same term
negative Opposition (chess), the position of the kings relative to each other Opposition (astronomy), the position of a celestial body Opposition (astrology)
Opposition
Alignment of celestial bodies
In astronomy, a syzygy (/ˈsɪzədʒi/ SIZ-ə-jee) is a roughly straight-line configuration of three or more celestial bodies in a gravitational system. The
Syzygy_(astronomy)
Objects that appear to be close in the sky
Occultation Elongation (astronomy) Great conjunction Opposition (astronomy) Planetary parade Spherical astronomy Syzygy (astronomy) Triple conjunction Her
Conjunction_(astronomy)
Main-belt asteroid
Astronomy. Archived from the original on 10 April 2026. Retrieved 7 August 2026. Ford, Dominic (23 January 2026). "Asteroid 44 Nysa at opposition".
44_Nysa
Term in astronomy
In astronomy, a transit (or astronomical transit) is the passage of a celestial body directly between a larger body and the observer. As viewed from a
Astronomical_transit
Solar system object is on the opposite side of the Sun from the Earth
Perseverance in October 2021. Conjunction (astronomy and astrology) List of conjunctions (astronomy) Opposition (astronomy) Khan, Amina (2013-04-05). "NASA Mars
Solar_conjunction
Fourth planet from the Sun
the orbital motion of Mars. Ptolemy's model and his collective work on astronomy was presented in the multi-volume collection later called the Almagest
Mars
Political opposition to the Islamic Republic government
The Iranian opposition consists of various political groups, movements and people who oppose and seek the overthrow of the government of the Islamic Republic
Iranian_opposition
Apparent least distance between two celestial objects
telescopy, e.g. Jupiter-Saturn appulse of December 13, 2020. Opposition (astronomy) Syzygy (astronomy) Her Majesty's Nautical Almanac Office and United States
Appulse
of astronomy is a list of definitions of terms and concepts relevant to astronomy and cosmology, their sub-disciplines, and related fields. Astronomy is
Glossary_of_astronomy
Time an astronomical object takes to complete one orbit around another object
astronomical object takes to complete one orbit around another object. In astronomy, it usually applies to planets or asteroids orbiting the Sun, moons orbiting
Orbital_period
Astronomy on the Indian subcontinent
Astronomy has a long history in the Indian subcontinent, stretching from pre-historic to modern times. Some of the earliest roots of Indian astronomy
Indian_astronomy
Optical effect
The opposition surge (sometimes known as the opposition effect, opposition spike or Seeliger effect) is the brightening of a rough surface, or an object
Opposition_surge
In astronomy, angular separation between the Sun and a planet
In astronomy, a planet's elongation is the angular separation between the Sun and the planet, with Earth as the reference point. The greatest elongation
Elongation_(astronomy)
Aspect of science history
Astronomy in China has a long history stretching from the Shang dynasty, being refined over a period of more than 3,000 years. The ancient Chinese people
Chinese_astronomy
Zodiac constellation in the southern celestial hemisphere
Emeritus of Astronomy, University of Illinois, http://stars.astro.illinois.edu/sow/sowlist.html Baker, David (1978). The Henry Holt Guide to Astronomy. New York:
Sagittarius_(constellation)
Danish astronomer (1546–1601)
unprecedentedly accurate astronomical observations which helped to turn astronomy into the first modern science and launch the Scientific Revolution. He
Tycho_Brahe
Astronomy written in Hebrew or by Hebrew speakers
Hebrew astronomy is any astronomy written in Hebrew or by Hebrew speakers, or translated into Hebrew, or written by Jews in Judeo-Arabic. It includes a
Hebrew_astronomy
Distance measuring technique
In astronomy, parallax is the apparent shift in position of a nearby celestial object relative to distant background objects which is caused by a change
Parallax_in_astronomy
Pseudoscientific divination based on the movements of the stars
overlapped considerably with that of astronomy (derived from the Latin astronomia). By the 17th century, astronomy became established as the scientific
Astrology
German astronomer and mathematician (1571–1630)
there was no clear distinction between astronomy and astrology, but there was a strong division between astronomy (a branch of mathematics within the liberal
Johannes_Kepler
Italian physicist and astronomer (1564–1642)
Duchy of Florence. Galileo has been called the father of observational astronomy, classical physics, the scientific method, and modern science. He studied
Galileo_Galilei
Symbols in astronomy
objects, theoretical constructs and observational events in European astronomy. The earliest forms of these symbols appear in Greek papyrus texts of
Astronomical_symbols
Length of time after which an eclipse repeats
In astronomy, the saros (/ˈsɛərɒs/ ) is a length of time covering exactly 223 synodic months (18 years 11 days and 8 hours), nearly 242 draconic months
Saros_(astronomy)
Astronomical observatories in Hawaii
zone known as the "Astronomy Precinct", which is located within the 11,228-acre (4,544 ha) Mauna Kea Science Reserve. The Astronomy Precinct was established
Maunakea_Observatories
participation in science was discouraged. She studied mathematics and astronomy, and was nominated to be jointly the first female member of the Royal
List of women in the Heritage Floor
List_of_women_in_the_Heritage_Floor
world's largest observatory for infrared and submillimeter telescopes. Opposition to the telescope from residents in the city of Hilo, Hawaii were concerned
Opposition to the Maunakea Observatories
Opposition_to_the_Maunakea_Observatories
Astronomy has been a favorite and significant component of mythology and religion throughout history. Astronomy and cosmology are parts of the myths of
Astronomy_and_religion
Pattern of seven bright stars in the constellation Ursa Major
and آلُ نَعْشٍ (Āl Naʿsh) refer to the constellation known in Western astronomy as the Big Dipper, which is part of Ursa Major. The term “Banāt Naʿsh”
Big_Dipper
Interstellar absorption and scattering of light
In astronomy, extinction is the absorption and scattering of electromagnetic radiation by dust and gas between an emitting astronomical object and the
Extinction_(astronomy)
First planet from the Sun
original on October 31, 2023. Retrieved October 25, 2023. Popular Astronomy: A Review of Astronomy and Allied Sciences. Goodsell Observatory of Carleton College
Mercury_(planet)
Largest moon of Saturn
proceed more slowly on Titan. Solar System portal Outer space portal Astronomy portal Colonization of Titan Lakes of Titan Atmosphere of Titan Life on
Titan_(moon)
Sky from planet Mercury
Astronomy on Mercury is the sky as viewed from the planet Mercury. Because Mercury only has a thin atmosphere, the sky will be black. Due to the proximity
Astronomy_on_Mercury
Change of rotational axis in an astronomical body
In astronomy, axial precession is a gravity-induced, slow, and continuous change in the orientation of an astronomical body's rotational axis. In the
Axial_precession
Mathematician and astronomer (1473–1543)
mathematical astronomy taught at the university (arithmetic, geometry, geometric optics, cosmography, theoretical and computational astronomy) and a good
Nicolaus_Copernicus
Second-largest moon of Jupiter
Coordinates and Rotational Elements: 2015". Celestial Mechanics and Dynamical Astronomy. 130 (3): 22. Bibcode:2018CeMDA.130...22A. doi:10.1007/s10569-017-9805-5
Callisto_(moon)
Star at the centre of the Solar System
Unsolved problem in astronomy Why is the Sun's corona so much hotter than the Sun's surface? More unsolved problems in astronomy The temperature of the
Sun
Mountain where Cole worked on projects. Cole had written a controversial astronomy article about the identification of asteroids that are potential threats
List_of_Elementary_episodes
Sun-centered astronomical model
geocentrism, which placed the Earth at the center of the universe. In modern astronomy, heliocentrism has been superseded by models based on relativity, in which
Heliocentrism
talented Maguses of his generation. He enrolled in the Clock Tower's Astronomy Faculty and was said to be the jewel of the Clock Tower. Kirschtaria was
List of Fate/Grand Order characters
List_of_Fate/Grand_Order_characters
Recurring visual proximity of planets and stars
appear to meet each other three times during a brief period, either in opposition or at the time of inferior conjunction, if an inferior planet is involved
Triple_conjunction
Second planet from the Sun
star, as with the Star of Ishtar. Solar System portal Outer space portal Astronomy portal Outline of Venus Physical properties of planets in the Solar System
Venus
Colonial American astronomy can be traced to the time when the English began colonizing in the New World during the 16th century. They brought with them
Colonial_American_astronomy
Former musical movement
Rock in Opposition or RIO was a movement representing a collective of progressive rock bands in the late 1970s united in their opposition to the music
Rock_in_Opposition
10 January 2022. Retrieved 10 January 2022. Zarka, Philippe (2011). "Astronomy and astrology". Proceedings of the International Astronomical Union. 5
List_of_pseudoscience_topics
50-volume anthology of classic works from world literature
Natural Science "General Introduction", by Lawrence Joseph Henderson "Astronomy", by Lawrence Joseph Henderson "Physics and Chemistry", by Lawrence Joseph
Harvard_Classics
Astronomy according to different cultures
Chinese astronomy Egyptian astronomy Hebrew astronomy Indian astronomy Maya astronomy Inuit astronomy Persian astronomy Serbian folk astronomy Tibetan
Cultural_astronomy
Seventh planet from the Sun
water, ammonia, and methane in a supercritical phase of matter, which astronomy calls "ice" or volatiles. The planet's atmosphere has a complex layered
Uranus
Sixth planet from the Sun
for precession formulae and mean elements for the Moon and planets". Astronomy and Astrophysics. 282 (2): 663–683. Bibcode:1994A&A...282..663S. Souami
Saturn
Hawaiian volcano
experience in solar astronomy. This culminated in funds being awarded to the "upstart" UH proposal. UH rebuilt its small astronomy department into a new
Mauna_Kea
American photographer and environmentalist (1902–1984)
a three-inch telescope, and they enthusiastically shared the hobby of astronomy, visiting the Lick Observatory on Mount Hamilton together. Charles was
Ansel_Adams
When an object is hidden behind another
by another object that passes between them. The term is often used in astronomy, but can also refer to any situation in which an object in the foreground
Occultation
founded in 1666, was located; it had separate sections for geometry, astronomy, mechanics, anatomy, chemistry and botany. Under Louis XVI, the 18th century
Paris_in_the_18th_century
Metallic main-belt asteroid
(16) Psyche's primordial shape: A possible Jacobi ellipsoid?" (PDF). Astronomy and Astrophysics. 638: L15. Bibcode:2020A&A...638L..15F. doi:10.1051/0004-6361/202038100
16_Psyche
Court of Appeals (1978–1992). Greg Quicke, 62, Australian astronomer, astronomy tour operator and author. Gerhard Rödding, 91, German politician, member
Deaths_in_June_2024
field of astronomy. They may have won major prizes or awards, developed or invented widely used techniques or technologies within astronomy, or are directors
List_of_astronomers
v t e India topics History Overviews Timeline Years Astronomy Clothing Coinage Economics LGBTQ Linguistics Maritime Mathematics Metallurgy Military Paper
Pornography_in_India
Angle between the light incident on, and reflected from, an astronomical object
In observational astronomy, phase angle is the angle between the light incident onto an observed object and the light reflected from the object. In the
Phase_angle_(astronomy)
Decade
June 17 – 18: The royal council of Saint-Basle de Verzy is marked by opposition between the bishops and the monks. Gerbert d'Aurillac is elected as the
990s
Largest moon of Jupiter
The mission was cancelled due to a lack of funding in 2017. Cold trap (astronomy) Moons of Jupiter Galilean moons (the four biggest moons of Jupiter) Jupiter's
Ganymede_(moon)
Superseded description of the Universe with Earth at the center
Professor of Optics and Astronomy at La Sapienza University, regarding permission to publish his work Elements of Astronomy in which he espouses the
Geocentrism
Void between celestial bodies
poet Lady Emmeline Stuart-Wortley called "The Maiden of Moscow", but in astronomy the term outer space found its application for the first time in 1845
Outer_space
City in Turkey
As part of the university Gregory Choniades opened a new academy of astronomy, which housed the best observatory outside Persia. Choniades brought with
Trabzon
Legislative Act of the Council of India
expense, medical doctrines, which would disgrace an English farrier,—Astronomy, which would move laughter in girls at an English boarding school,—History
English_Education_Act,_1835
Chinese state (c. 9th century – 207 BC)
Astronomy) 天文教育資訊網 2006 年 7 月 4 日 Archived 2011-05-22 at the Wayback Machine (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy)
Qin_(state)
Whole number
Babylonians, was using a symbol for zero (—°) in his work on mathematical astronomy called the Syntaxis Mathematica, also known as the Almagest. This Hellenistic
0
American astronomer (1889–1953)
He played a crucial role in establishing the fields of extragalactic astronomy and observational cosmology. Hubble proved that many objects previously
Edwin_Hubble
Uttarakhand affiliate of the Bharatiya Janata Party
Year Seats won +/- Outcome 2004 3 / 5 Opposition 2009 0 / 5 3 Opposition 2014 5 / 5 5 Government 2019 5 / 5 Government 2024 5 / 5 Government
Bharatiya Janata Party – Uttarakhand
Bharatiya_Janata_Party_–_Uttarakhand
Zodiac constellation straddling the celestial equator
to the Sun at vernal equinox around the 23rd century BC. In Babylonian astronomy, the constellation was listed in the MUL.APIN as GU4.AN.NA, "The Bull
Taurus_(constellation)
Nazi slogan opposing modernist and progressive cultural movements
v t e Culture Outline Sciences Cultural anthropology Cultural astronomy Cultural ecology Cultural geography Cultural neuroscience Cultural studies Culturology
Cultural_Bolshevism
Collection of Zoroastrian cosmogony and cosmology
creatures." IV A. (4) The death of the Sole-created Bovine. V. (5) "On the opposition of the two Spirits." V A. n/a "On the horoscope of the world, how it happened
Bundahishn
Large medieval prebendal church with Anglo Saxon foundations in Leicester, England
Sphera, De Iride, De Color, and De Accessu et Recessu Maris his works on astronomy, the rainbow, colour, and the tides, and above all for De Lineis, Angulis
St Margaret's Church, Leicester
St_Margaret's_Church,_Leicester
Roman statesman and lawyer (106–43 BC)
political, legal, and social equality. Cicero had an influence on modern astronomy. Nicolaus Copernicus, searching for ancient views on earth motion, said
Cicero
Calendar year
which had adopted the euro, and a referendum in Sweden showed strong opposition to the euro's adoption. Developing countries did especially well with
2003
use of precise measurement for gold, and familiarity with rudimentary astronomy is shown by fixing the precise day within the month in relation to the
History_of_the_Philippines
1975–1977 state of emergency in India under Prime Minister Indira Gandhi
Economist's description of her as the 'Empress of India' seemed apt." Even opposition leaders, who routinely accused her of being a dictator and of fostering
The_Emergency_(India)
Country in North America
October 8, 2009. Angelo, Joseph A. (2009). Encyclopedia of Space and Astronomy. Infobase Publishing. p. 22. ISBN 978-1-4381-1018-9. Bidaud, Philippe;
Canada
Apparent path of the Sun on the celestial sphere
of ancient sciences, providing the framework for key measurements in astronomy, astrology and calendar-making. The ecliptic is so named because the ancients
Ecliptic
cosmologist, author, science popularizer, and science communicator in astronomy and natural sciences, Cornell University Dennis W. Sciama (1926–1999)
List of Jewish atheists and agnostics
List_of_Jewish_atheists_and_agnostics
Widespread norms in a society
v t e Culture Outline Sciences Cultural anthropology Cultural astronomy Cultural ecology Cultural geography Cultural neuroscience Cultural studies Culturology
Popular_culture
Interdisciplinary theory
ISSN 1554-9178. Rollinde E (2019). "Learning Science Through Enacted Astronomy" (PDF). International Journal of Science and Mathematics Education. 17
Embodied_cognition
Girls school in Farmington, Connecticut, US
curriculum which included chemistry, physiology, botany, geology, and astronomy in addition to the more traditional subjects taught in girls' schools
Miss_Porter's_School
Chinese traditional practice
shui. Until the invention of the magnetic compass, feng shui relied on astronomy to find correlations between humans and the universe. In 4000 BC, the
Feng_shui
Library building in Boston, Massachusetts
president John Adams. Also included were Nathaniel Bowditch's math and astronomy collections, Theodore Parker's theology and history collections, Antonio
Boston_Central_Library
Politico-religious ideology
extra measures to silence leftist opposition forces, often with the help of foreign powers. Silencing leftist opposition deprived the masses of a channel
Islamism
Binary star in the constellation Scorpius
an outdated speculation, because the name of this star in Mesopotamian astronomy has always been "heart of Scorpion" and it was associated with the goddess
Antares
Fourth-largest moon of Uranus
Uranian subnebula – Implications for regular satellite composition". Astronomy & Astrophysics. 413: 373–380. Bibcode:2004A&A...413..373M. doi:10
Ariel_(moon)
Second largest main-belt asteroid
D.; Souchay, J. (July 2012). "The solar system's invariable plane". Astronomy & Astrophysics. 543: 11. Bibcode:2012A&A...543A.133S. doi:10.1051/0004-6361/201219011
4_Vesta
Human vision, unaided by optical instruments
instrument, such as a telescope or microscope, or eye protection. In astronomy, the naked eye may be used to observe celestial events and objects visible
Naked_eye
Muslim-ruled parts of the Iberian Peninsula (711–1492)
al-Andalus, including major advances in trigonometry (Jabir ibn Aflah), astronomy (al-Zarqali), surgery (al-Zahrawi), pharmacology (Ibn Zuhr), and agronomy
Al-Andalus
Political party in India
official opposition yet again. In the 2024 general election, the party performed better-than-expected, and won 99 seats, forming the official opposition with
Indian_National_Congress
Jewish ritual and prayer service
scholarly work". Lobel, Andrea D. (August 2015). Under a Censored Sky: Astronomy and Rabbinic Authority in the Talmud Bavli and Related Literature. Concordia
Kiddush_levana
Stratified complex society
v t e Culture Outline Sciences Cultural anthropology Cultural astronomy Cultural ecology Cultural geography Cultural neuroscience Cultural studies Culturology
Civilization
Abbasid Caliph from 813 to 833
Shannon (14 February 2017). "How Islamic scholarship birthed modern astronomy". Astronomy Magazine. Retrieved 16 April 2025. "Ali ibn Isa al-Asturlabi". islamsci
Al-Ma'mun
by political figures, media personalities, and some academics to rally opposition against social change. Researchers have documented their spread across
List_of_conspiracy_theories
Organization conducting active SETI
Impey, Associate Dean, College of Science and Distinguished Professor of Astronomy, University of Arizona, USA Mary Lee Jensvold, Director of the Chimpanzee
METI_International
End of Time is a 2019 short epic documentary film created by American astronomy-themed musician and filmmaker John D. Boswell, made as a follow-up to
List of notable YouTube videos
List_of_notable_YouTube_videos
Indian-American astronaut (1962–2003)
failed deployment of the Shuttle-Pointed Autonomous Research Tool for Astronomy (SPARTAN) module. Her second space mission, STS-107, was both Chawla's
Kalpana_Chawla
Head of the Catholic Church from 1523 to 1534
Copernicus: A Note on the Sistine Last Judgement". Journal for the History of Astronomy. 31 (2): 156. Bibcode:2000JHA....31..156S. doi:10.1177/002182860003100205
Pope_Clement_VII
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OPPOSITION ASTRONOMY
OPPOSITION ASTRONOMY
OPPOSITION ASTRONOMY
OPPOSITION ASTRONOMY
OPPOSITION ASTRONOMY
OPPOSITION ASTRONOMY
OPPOSITION ASTRONOMY
OPPOSITION ASTRONOMY
OPPOSITION ASTRONOMY
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