247 relations: Absorption band, Acetylene, Albedo, Alexander Pope, Almagest, American Revolutionary War, Ammonia, Ammonium hydrosulfide, Anders Johan Lexell, Angular diameter, Anus, Apparent magnitude, Aquamarine (color), Aquarius (astrology), Ariel (moon), Astrology, Astronomer, Astronomer Royal, Astronomical symbols, Atmosphere, Atom, Aurora, Axial tilt, Bar (unit), Bath, Somerset, Bond albedo, Bow shocks in astrophysics, Brady Haran, Carbon dioxide, Carbon monoxide, Cassini–Huygens, CGP Grey, Charged particle, Chemical element, Chinese language, Circulation (fluid dynamics), Classical planet, Cloud, Colonization of the outer Solar System, Comet, Convection, Corona (planetary geology), Cronus, Cyan, Density, Diacetylene, Diapir, Dihydrogen cation, Discovery of Neptune, Double diffusive convection, ..., Drag (physics), Dwarf planet, Ecliptic, Effective temperature, Electric blue (color), Electron, Electronvolt, Emission spectrum, Epoch (astronomy), Equator, Equinox, Erik Prosperin, Ethane, Extraterrestrial diamonds, Far infrared, Flux, Formation and evolution of the Solar System, G-force, Gas composition, Gas giant, Gauss (unit), Geographical pole, Geometric albedo, George III of the United Kingdom, Giant planet, Greek mythology, Gustav Holst, Hawaiian language, Heat flux, Helium, Herschel Museum of Astronomy, Hipparchus, HM Nautical Almanac Office, Horseshoe orbit, Hour, Hubble Space Telescope, Hydrocarbon, Hydrogen, Hydrogen deuteride, Hydrogen sulfide, Ice giant, Infrared, Internal heating, International Astronomical Union, Invariable plane, Ion, Ionosphere, Iron–nickel alloy, James L. Elliot, Japanese language, Jérôme Lalande, Jessica Mink, Jet Propulsion Laboratory, Johann Elert Bode, Johann Gottfried Galle, John Couch Adams, John Flamsteed, John Keats, Joseph Banks, Julian year (astronomy), Jupiter, Jupiter (mythology), Kelvin, Korean language, Kuiper Airborne Observatory, Lagrangian point, Latitude, Lawrence Livermore National Laboratory, Limb darkening, List of natural satellites, Mab (moon), Magic (supernatural), Magnetic field, Magnetopause, Magnetosphere, Mantle (geology), Mars, Martin Heinrich Klaproth, Māori language, Mesosphere, Methane, Methane clathrate, Microwave, Military operation, Miranda (moon), Mixing ratio, Mongolian language, Moon, Moons of Uranus, Mrtyu, Naked eye, NASA, NASA Uranus orbiter and probe, National Geographic, Natural satellite, Neptune, Nevil Maskelyne, Nice model, Oberon (moon), Occultation, On First Looking into Chapman's Homer, Operation Uranus, Orbital resonance, Outline of Uranus, Pamela L. Gay, Pascal (unit), Photodissociation, Photometry (astronomy), Pierre Charles Le Monnier, Pierre-Simon Laplace, Pioneer Venus Multiprobe, Planet, Planetary core, Planetary flyby, Planetary migration, Planetary Science Decadal Survey, Planets in astrology, Pluto, Pressure, Properties of water, Propyne, Proton, Protoplanet, Ptolemy, Retrograde and prograde motion, Rift, Right-hand rule, Ring system, Rings of Saturn, Rings of Uranus, Rock (geology), Rotation around a fixed axis, Royal Navy, Royal Society, Royal Swedish Academy of Sciences, Sanskrit, Saturn, Saturn (mythology), Second, Silicate, Solar System, Solar time, Solar wind, Solstice, Southern Illinois University Edwardsville, Soviet Army, Space weather, Space weathering, Spectral bands, Spheroid, Standard gravitational parameter, Star catalogue, Stipend, Stratosphere, Sun, Superionic water, Taurus (constellation), Telescope, Tesla (unit), Thai language, The Planets, The Washington Post, Thermal conduction, Thermosphere, Tidal heating, Titan (moon), Titan (mythology), Titania (moon), Triton (moon), Tropopause, Troposphere, Ultraviolet, Umbriel (moon), University of Nottingham, Uranium, Uranus, Uranus (mythology), Uranus in fiction, Uranus Pathfinder, Urbain Le Verrier, Van Allen radiation belt, Vietnamese language, Visible spectrum, Volatiles, Volgograd, Voyager 1, Voyager 2, W. M. Keck Observatory, Wehrmacht, William Herschel, William Shakespeare, Windsor, Berkshire, World War II, Zeta Tauri, Zeus, Zonal and meridional, 83982 Crantor. Expand index (197 more) » « Shrink index
According to quantum mechanics, atoms and molecules can only hold certain defined quantities of energy, or exist in specific states.
Acetylene (systematic name: ethyne) is the chemical compound with the formula C2H2.
Albedo (albedo, meaning "whiteness") is the measure of the diffuse reflection of solar radiation out of the total solar radiation received by an astronomical body (e.g. a planet like Earth).
Alexander Pope (21 May 1688 – 30 May 1744) was an 18th-century English poet.
The Almagest is a 2nd-century Greek-language mathematical and astronomical treatise on the apparent motions of the stars and planetary paths, written by Claudius Ptolemy. One of the most influential scientific texts of all time, its geocentric model was accepted for more than 1200 years from its origin in Hellenistic Alexandria, in the medieval Byzantine and Islamic worlds, and in Western Europe through the Middle Ages and early Renaissance until Copernicus.
The American Revolutionary War (17751783), also known as the American War of Independence, was a global war that began as a conflict between Great Britain and its Thirteen Colonies which declared independence as the United States of America. After 1765, growing philosophical and political differences strained the relationship between Great Britain and its colonies. Patriot protests against taxation without representation followed the Stamp Act and escalated into boycotts, which culminated in 1773 with the Sons of Liberty destroying a shipment of tea in Boston Harbor. Britain responded by closing Boston Harbor and passing a series of punitive measures against Massachusetts Bay Colony. Massachusetts colonists responded with the Suffolk Resolves, and they established a shadow government which wrested control of the countryside from the Crown. Twelve colonies formed a Continental Congress to coordinate their resistance, establishing committees and conventions that effectively seized power. British attempts to disarm the Massachusetts militia at Concord, Massachusetts in April 1775 led to open combat. Militia forces then besieged Boston, forcing a British evacuation in March 1776, and Congress appointed George Washington to command the Continental Army. Concurrently, an American attempt to invade Quebec and raise rebellion against the British failed decisively. On July 2, 1776, the Continental Congress voted for independence, issuing its declaration on July 4. Sir William Howe launched a British counter-offensive, capturing New York City and leaving American morale at a low ebb. However, victories at Trenton and Princeton restored American confidence. In 1777, the British launched an invasion from Quebec under John Burgoyne, intending to isolate the New England Colonies. Instead of assisting this effort, Howe took his army on a separate campaign against Philadelphia, and Burgoyne was decisively defeated at Saratoga in October 1777. Burgoyne's defeat had drastic consequences. France formally allied with the Americans and entered the war in 1778, and Spain joined the war the following year as an ally of France but not as an ally of the United States. In 1780, the Kingdom of Mysore attacked the British in India, and tensions between Great Britain and the Netherlands erupted into open war. In North America, the British mounted a "Southern strategy" led by Charles Cornwallis which hinged upon a Loyalist uprising, but too few came forward. Cornwallis suffered reversals at King's Mountain and Cowpens. He retreated to Yorktown, Virginia, intending an evacuation, but a decisive French naval victory deprived him of an escape. A Franco-American army led by the Comte de Rochambeau and Washington then besieged Cornwallis' army and, with no sign of relief, he surrendered in October 1781. Whigs in Britain had long opposed the pro-war Tories in Parliament, and the surrender gave them the upper hand. In early 1782, Parliament voted to end all offensive operations in North America, but the war continued in Europe and India. Britain remained under siege in Gibraltar but scored a major victory over the French navy. On September 3, 1783, the belligerent parties signed the Treaty of Paris in which Great Britain agreed to recognize the sovereignty of the United States and formally end the war. French involvement had proven decisive,Brooks, Richard (editor). Atlas of World Military History. HarperCollins, 2000, p. 101 "Washington's success in keeping the army together deprived the British of victory, but French intervention won the war." but France made few gains and incurred crippling debts. Spain made some minor territorial gains but failed in its primary aim of recovering Gibraltar. The Dutch were defeated on all counts and were compelled to cede territory to Great Britain. In India, the war against Mysore and its allies concluded in 1784 without any territorial changes.
Ammonia is a compound of nitrogen and hydrogen with the formula NH3.
Ammonium hydrosulfide is the chemical compound with the formula (NH4)SH.
Anders Johan Lexell (24 December 1740 &ndash) was a Finnish-Swedish astronomer, mathematician, and physicist who spent most of his life in Imperial Russia, where he was known as Andrei Ivanovich Leksel (Андрей Иванович Лексель).
The angular diameter, angular size, apparent diameter, or apparent size is an angular measurement describing how large a sphere or circle appears from a given point of view.
The anus (from Latin anus meaning "ring", "circle") is an opening at the opposite end of an animal's digestive tract from the mouth.
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
Aquamarine is a color that is a bluish tint of cerulean toned toward cyan.
Aquarius (♒) is the eleventh astrological sign in the Zodiac, originating from the constellation Aquarius.
Ariel is the fourth-largest of the 27 known moons of Uranus.
Astrology is the study of the movements and relative positions of celestial objects as a means for divining information about human affairs and terrestrial events.
An astronomer is a scientist in the field of astronomy who concentrates their studies on a specific question or field outside the scope of Earth.
Astronomer Royal is a senior post in the Royal Households of the United Kingdom.
Astronomical symbols are symbols used to represent astronomical objects, theoretical constructs and observational events in astronomy.
An atmosphere is a layer or a set of layers of gases surrounding a planet or other material body, that is held in place by the gravity of that body.
An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element.
An aurora (plural: auroras or aurorae), sometimes referred to as polar lights, northern lights (aurora borealis) or southern lights (aurora australis), is a natural light display in the Earth's sky, predominantly seen in the high-latitude regions (around the Arctic and Antarctic).
In astronomy, axial tilt, also known as obliquity, is the angle between an object's rotational axis and its orbital axis, or, equivalently, the angle between its equatorial plane and orbital plane.
The bar is a metric unit of pressure, but is not approved as part of the International System of Units (SI).
Bath is the largest city in the ceremonial county of Somerset, England, known for its Roman-built baths.
The Bond albedo, named after the American astronomer George Phillips Bond (1825–1865), who originally proposed it, is the fraction of power in the total electromagnetic radiation incident on an astronomical body that is scattered back out into space.
Bow shocks form the boundary between a magnetosphere and an ambient magnetized medium.
Brady John Haran (born 18 June 1976) is an Australian-born British independent filmmaker and video journalist who is known for his educational videos and documentary films produced for BBC News and his YouTube channels, the most notable being Periodic Videos and Numberphile.
Carbon dioxide (chemical formula) is a colorless gas with a density about 60% higher than that of dry air.
Carbon monoxide (CO) is a colorless, odorless, and tasteless gas that is slightly less dense than air.
The Cassini–Huygens mission, commonly called Cassini, was a collaboration between NASA, the European Space Agency (ESA), and the Italian Space Agency (ASI) to send a probe to study the planet Saturn and its system, including its rings and natural satellites.
CGP Grey is an American-Irish educational YouTuber and podcaster who posts on YouTube under the channel CGP Grey. Grey also posts videos on his secondary channel, CGPGrey2, and livestreams gameplay on another channel, CGP Play.
In physics, a charged particle is a particle with an electric charge.
A chemical element is a species of atoms having the same number of protons in their atomic nuclei (that is, the same atomic number, or Z).
Chinese is a group of related, but in many cases mutually unintelligible, language varieties, forming a branch of the Sino-Tibetan language family.
In fluid dynamics, circulation is the line integral around a closed curve of the velocity field.
In classical antiquity, the seven classical planets are the seven non-fixed astronomical objects in the sky visible to the naked eye: Mars, Jupiter, Venus, Saturn, Mercury, the Sun, and the Moon.
In meteorology, a cloud is an aerosol consisting of a visible mass of minute liquid droplets, frozen crystals, or other particles suspended in the atmosphere of a planetary body.
Many parts of the outer Solar System have been considered for possible future colonization.
A comet is an icy small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process called outgassing.
Convection is the heat transfer due to bulk movement of molecules within fluids such as gases and liquids, including molten rock (rheid).
In planetary geology, a corona (plural: coronae) is an oval-shaped feature.
In Greek mythology, Cronus, Cronos, or Kronos (or from Κρόνος, Krónos), was the leader and youngest of the first generation of Titans, the divine descendants of Uranus, the sky, and Gaia, the earth.
Cyan is a greenish-blue color.
The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume.
Diacetylene (also known as butadiyne) is the organic compound with the formula C4H2.
A diapir (French, from Greek diapeirein, to pierce through) is a type of geologic intrusion in which a more mobile and ductily deformable material is forced into brittle overlying rocks.
The hydrogen molecular ion, dihydrogen cation, or, is the simplest molecular ion.
The planet Neptune was mathematically predicted before it was directly observed.
Double diffusive convection is a fluid dynamics phenomenon that describes a form of convection driven by two different density gradients, which have different rates of diffusion.
In fluid dynamics, drag (sometimes called air resistance, a type of friction, or fluid resistance, another type of friction or fluid friction) is a force acting opposite to the relative motion of any object moving with respect to a surrounding fluid.
A dwarf planet is a planetary-mass object that is neither a planet nor a natural satellite.
The ecliptic is the circular path on the celestial sphere that the Sun follows over the course of a year; it is the basis of the ecliptic coordinate system.
The effective temperature of a body such as a star or planet is the temperature of a black body that would emit the same total amount of electromagnetic radiation.
Electric blue is a color whose definition varies but is often considered close to cyan, and which is a representation of the color of lightning, an electric spark, and the color of ionized argon gas; it was originally named after the ionized air glow produced during electrical discharges, though its meaning has broadened to include shades of blue that are metaphorically "electric" by virtue of being "intense" or particularly "vibrant".
The electron is a subatomic particle, symbol or, whose electric charge is negative one elementary charge.
In physics, the electronvolt (symbol eV, also written electron-volt and electron volt) is a unit of energy equal to approximately joules (symbol J).
The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a transition from a high energy state to a lower energy state.
In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.
An equator of a rotating spheroid (such as a planet) is its zeroth circle of latitude (parallel).
An equinox is commonly regarded as the moment the plane (extended indefinitely in all directions) of Earth's equator passes through the center of the Sun, which occurs twice each year, around 20 March and 22-23 September.
Erik Prosperin (25 July 1739 – 4 April 1803) was a Swedish astronomer.
Ethane is an organic chemical compound with chemical formula.
Although diamonds on Earth are rare, extraterrestrial diamonds (diamonds formed outside of Earth) are very common.
Far infrared (FIR) is a region in the infrared spectrum of electromagnetic radiation.
Flux describes the quantity which passes through a surface or substance.
The formation and evolution of the Solar System began 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud.
The gravitational force, or more commonly, g-force, is a measurement of the type of acceleration that causes a perception of weight.
The Gas composition of any gas can be characterised by listing the pure substances it contains, and stating for each substance its proportion of the gas mixture's molecule count.
A gas giant is a giant planet composed mainly of hydrogen and helium.
The gauss, abbreviated as G or Gs, is the cgs unit of measurement of magnetic flux density (or "magnetic induction") (B).
A geographical pole is either of the two points on a rotating body (planet, dwarf planet, natural satellite, sphere...etc) where its axis of rotation intersects its surface.
In astronomy, the geometric albedo of a celestial body is the ratio of its actual brightness as seen from the light source (i.e. at zero phase angle) to that of an idealized flat, fully reflecting, diffusively scattering (Lambertian) disk with the same cross-section.
George III (George William Frederick; 4 June 1738 – 29 January 1820) was King of Great Britain and Ireland from 25 October 1760 until the union of the two countries on 1 January 1801, after which he was King of the United Kingdom of Great Britain and Ireland until his death in 1820.
A giant planet is any massive planet.
Greek mythology is the body of myths and teachings that belong to the ancient Greeks, concerning their gods and heroes, the nature of the world, and the origins and significance of their own cult and ritual practices.
Gustav Theodore Holst (born Gustavus Theodore von Holst; 21 September 1874 – 25 May 1934) was an English composer, arranger and teacher.
The Hawaiian language (Hawaiian: Ōlelo Hawaii) is a Polynesian language that takes its name from Hawaiokinai, the largest island in the tropical North Pacific archipelago where it developed.
Heat flux or thermal flux, sometimes also referred to as heat flux density or heat flow rate intensity is a flow of energy per unit of area per unit of time.
Helium (from lit) is a chemical element with symbol He and atomic number 2.
The Herschel Museum of Astronomy at 19 New King Street, Bath, England, is a museum that was inaugurated in 1981.
Hipparchus of Nicaea (Ἵππαρχος, Hipparkhos) was a Greek astronomer, geographer, and mathematician.
Her Majesty's Nautical Almanac Office (HMNAO), now part of the United Kingdom Hydrographic Office, was established in 1832 on the site of the Royal Greenwich Observatory (RGO), where The Nautical Almanac had been published since 1767.
A horseshoe orbit is a type of co-orbital motion of a small orbiting body relative to a larger orbiting body (such as Earth).
An hour (symbol: h; also abbreviated hr.) is a unit of time conventionally reckoned as of a day and scientifically reckoned as 3,599–3,601 seconds, depending on conditions.
The Hubble Space Telescope (HST) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation.
In organic chemistry, a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon.
Hydrogen is a chemical element with symbol H and atomic number 1.
Hydrogen deuteride is a diatomic molecule substance or compound of the two isotopes of hydrogen: the majority isotope 1H protium and 2H deuterium.
Hydrogen sulfide is the chemical compound with the chemical formula H2S.
An ice giant is a giant planet composed mainly of elements heavier than hydrogen and helium, such as oxygen, carbon, nitrogen, and sulfur.
Infrared radiation (IR) is electromagnetic radiation (EMR) with longer wavelengths than those of visible light, and is therefore generally invisible to the human eye (although IR at wavelengths up to 1050 nm from specially pulsed lasers can be seen by humans under certain conditions). It is sometimes called infrared light.
Internal heat is the heat source from the interior of celestial objects, such as stars, brown dwarfs, planets, moons, dwarf planets, and (in the early history of the Solar System) even asteroids such as Vesta, resulting from contraction caused by gravity (the Kelvin–Helmholtz mechanism), nuclear fusion, tidal heating, core solidification (heat of fusion released as molten core material solidifies), and radioactive decay.
The International Astronomical Union (IAU; Union astronomique internationale, UAI) is an international association of professional astronomers, at the PhD level and beyond, active in professional research and education in astronomy.
The invariable plane of a planetary system, also called Laplace's invariable plane, is the plane passing through its barycenter (center of mass) perpendicular to its angular momentum vector.
An ion is an atom or molecule that has a non-zero net electrical charge (its total number of electrons is not equal to its total number of protons).
The ionosphere is the ionized part of Earth's upper atmosphere, from about to altitude, a region that includes the thermosphere and parts of the mesosphere and exosphere.
An iron–nickel alloy or nickel–iron alloy, abbreviated FeNi or NiFe, is a group of alloys consisting primarily of the elements nickel (Ni) and iron (Fe).
James Ludlow Elliot (17 June 1943 – 3 March 2011) was an American astronomer and scientist who, as part of a team, discovered the rings around the planet Uranus.
is an East Asian language spoken by about 128 million people, primarily in Japan, where it is the national language.
Joseph Jérôme Lefrançois de Lalande (11 July 1732 – 4 April 1807) was a French astronomer, freemason and writer.
Jessica Mink (formerly Douglas John Mink) is an American software developer and a data archivist at the Harvard-Smithsonian Center for Astrophysics.
The Jet Propulsion Laboratory (JPL) is a federally funded research and development center and NASA field center in Pasadena, California, United States, with large portions of the campus in La Cañada Flintridge, California.
Johann Elert Bode (19 January 1747 – 23 November 1826) was a German astronomer known for his reformulation and popularisation of the Titius–Bode law.
Johann Gottfried Galle, 1880 Galle's signature Memorial plaque in Wittenberg Johann Gottfried Galle (9 June 1812 – 10 July 1910) was a German astronomer from Radis, Germany, at the Berlin Observatory who, on 23 September 1846, with the assistance of student Heinrich Louis d'Arrest, was the first person to view the planet Neptune and know what he was looking at.
John Couch Adams (5 June 1819 – 21 January 1892) was a British mathematician and astronomer.
John Flamsteed FRS (19 August 1646 – 31 December 1719) was an English astronomer and the first Astronomer Royal.
John Keats (31 October 1795 – 23 February 1821) was an English Romantic poet.
Sir Joseph Banks, 1st Baronet, (19 June 1820) was an English naturalist, botanist and patron of the natural sciences.
In astronomy, a Julian year (symbol: a) is a unit of measurement of time defined as exactly 365.25 days of SI seconds each.
Jupiter is the fifth planet from the Sun and the largest in the Solar System.
Jupiter (from Iūpiter or Iuppiter, *djous “day, sky” + *patēr “father," thus "heavenly father"), also known as Jove gen.
The Kelvin scale is an absolute thermodynamic temperature scale using as its null point absolute zero, the temperature at which all thermal motion ceases in the classical description of thermodynamics.
The Korean language (Chosŏn'gŭl/Hangul: 조선말/한국어; Hanja: 朝鮮말/韓國語) is an East Asian language spoken by about 80 million people.
The Gerard P. Kuiper Airborne Observatory (KAO) was a national facility operated by NASA to support research in infrared astronomy.
In celestial mechanics, the Lagrangian points (also Lagrange points, L-points, or libration points) are positions in an orbital configuration of two large bodies, wherein a small object, affected only by the gravitational forces from the two larger objects, will maintain its position relative to them.
In geography, latitude is a geographic coordinate that specifies the north–south position of a point on the Earth's surface.
Lawrence Livermore National Laboratory (LLNL) is an American federal research facility in Livermore, California, United States, founded by the University of California, Berkeley in 1952.
Limb darkening is an optical effect seen in stars (including the Sun), where the center part of the disk appears brighter than the edge or limb of the image.
The Solar System's planets and officially recognized dwarf planets are known to be orbited by 184 natural satellites, or moons.
Mab, or Uranus XXVI (26), is an inner satellite of Uranus.
Magic is a category in Western culture into which have been placed various beliefs and practices considered separate from both religion and science.
A magnetic field is a vector field that describes the magnetic influence of electrical currents and magnetized materials.
The magnetopause is the abrupt boundary between a magnetosphere and the surrounding plasma.
A magnetosphere is the region of space surrounding an astronomical object in which charged particles are manipulated or affected by that object's magnetic field.
The mantle is a layer inside a terrestrial planet and some other rocky planetary bodies.
Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury.
Martin Heinrich Klaproth (1 December 1743 – 1 January 1817) was a German chemist who discovered uranium (1789), zirconium (1789), and cerium (1803), and named titanium (1795) and tellurium (1798).
Māori, also known as te reo ("the language"), is an Eastern Polynesian language spoken by the Māori people, the indigenous population of New Zealand.
The mesosphere (from Greek mesos "middle" and sphaira "sphere") is the layer of the Earth's atmosphere that is directly above the stratosphere and directly below the thermosphere.
Methane is a chemical compound with the chemical formula (one atom of carbon and four atoms of hydrogen).
Methane clathrate (CH4·5.75H2O) or (4CH4·23H2O), also called methane hydrate, hydromethane, methane ice, fire ice, natural gas hydrate, or gas hydrate, is a solid clathrate compound (more specifically, a clathrate hydrate) in which a large amount of methane is trapped within a crystal structure of water, forming a solid similar to ice.
Microwaves are a form of electromagnetic radiation with wavelengths ranging from one meter to one millimeter; with frequencies between and.
A military operation is the coordinated military actions of a state, or a non-state actor, in response to a developing situation.
Miranda, also designated Uranus V, is the smallest and innermost of Uranus's five round satellites.
In chemistry and physics, the dimensionless mixing ratio is the abundance of one component of a mixture relative to that of all other components.
The Mongolian language (in Mongolian script: Moŋɣol kele; in Mongolian Cyrillic: монгол хэл, mongol khel.) is the official language of Mongolia and both the most widely-spoken and best-known member of the Mongolic language family.
The Moon is an astronomical body that orbits planet Earth and is Earth's only permanent natural satellite.
Uranus is the seventh planet of the Solar System; it has 27 known moons, all of which are named after characters from the works of William Shakespeare and Alexander Pope.
Mṛtyu (from Vedic Sanskrit: मृत्यु IAST:; Latin cognate mortis), is a Sanskrit word meaning Death.
Naked eye, also called bare eye or unaided eye, is the practice of engaging in visual perception unaided by a magnifying or light-collecting optical instrument, such as a telescope or microscope.
The National Aeronautics and Space Administration (NASA) is an independent agency of the executive branch of the United States federal government responsible for the civilian space program, as well as aeronautics and aerospace research.
A Uranus orbiter and probe is a mission concept for study of the planet Uranus.
National Geographic (formerly the National Geographic Magazine and branded also as NAT GEO or) is the official magazine of the National Geographic Society.
A natural satellite or moon is, in the most common usage, an astronomical body that orbits a planet or minor planet (or sometimes another small Solar System body).
Neptune is the eighth and farthest known planet from the Sun in the Solar System.
The Rev Dr Nevil Maskelyne DD FRS FRSE (6 October 1732 – 9 February 1811) was the fifth British Astronomer Royal.
The Nice model is a scenario for the dynamical evolution of the Solar System.
Oberon, also designated, is the outermost major moon of the planet Uranus.
An occultation is an event that occurs when one object is hidden by another object that passes between it and the observer.
On First Looking into Chapman's Homer is a sonnet written by the English Romantic poet John Keats (1795–1821) in October 1816.
Operation Uranus (romanised: Operatsiya "Uran") was the codename of the Soviet 19–23 November 1942 strategic operation in World War II which led to the encirclement of the German Sixth Army, the Third and Fourth Romanian armies, and portions of the German Fourth Panzer Army.
In celestial mechanics, an orbital resonance occurs when orbiting bodies exert a regular, periodic gravitational influence on each other, usually because their orbital periods are related by a ratio of small integers.
The following outline is provided as an overview of and topical guide to Uranus: Uranus – seventh planet from the Sun.
Pamela L. Gay (born December 12, 1973) is an American astronomer, educator, podcaster, and writer, best known for her work in astronomical podcasting and citizen science astronomy projects.
The pascal (symbol: Pa) is the SI derived unit of pressure used to quantify internal pressure, stress, Young's modulus and ultimate tensile strength.
Photodissociation, photolysis, or photodecomposition is a chemical reaction in which a chemical compound is broken down by photons.
Photometry is a technique of astronomy concerned with measuring the flux, or intensity of an astronomical object's electromagnetic radiation.
Pierre Charles Le Monnier (20 November 1715 – 3 April 1799) was a French astronomer.
Pierre-Simon, marquis de Laplace (23 March 1749 – 5 March 1827) was a French scholar whose work was important to the development of mathematics, statistics, physics and astronomy.
The Pioneer Venus Multiprobe, also known as Pioneer Venus 2 or Pioneer 13 was a spacecraft launched in 1978 to explore Venus as part of NASA's Pioneer program.
A planet is an astronomical body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.
The planetary core consists of the innermost layer(s) of a planet; which may be composed of solid and liquid layers.
A planetary flyby is the act of sending a space probe past a planet or a dwarf planet close enough to record scientific data.
Planetary migration occurs when a planet or other stellar satellite interacts with a disk of gas or planetesimals, resulting in the alteration of the satellite's orbital parameters, especially its semi-major axis.
The Planetary Science Decadal Survey is a publication of the United States National Research Council produced for NASA and other United States Government Agencies such as the National Science Foundation.
Planets in astrology have a meaning different from the modern astronomical understanding of what a planet is.
Pluto (minor planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of bodies beyond Neptune.
Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.
Water is a polar inorganic compound that is at room temperature a tasteless and odorless liquid, which is nearly colorless apart from an inherent hint of blue. It is by far the most studied chemical compound and is described as the "universal solvent" and the "solvent of life". It is the most abundant substance on Earth and the only common substance to exist as a solid, liquid, and gas on Earth's surface. It is also the third most abundant molecule in the universe. Water molecules form hydrogen bonds with each other and are strongly polar. This polarity allows it to separate ions in salts and strongly bond to other polar substances such as alcohols and acids, thus dissolving them. Its hydrogen bonding causes its many unique properties, such as having a solid form less dense than its liquid form, a relatively high boiling point of 100 °C for its molar mass, and a high heat capacity. Water is amphoteric, meaning that it is both an acid and a base—it produces + and - ions by self-ionization.
Propyne (methylacetylene) is an alkyne with the chemical formula H3C≡CH.
A protoplanet is a large planetary embryo that originated within a protoplanetary disc and has undergone internal melting to produce a differentiated interior.
Claudius Ptolemy (Κλαύδιος Πτολεμαῖος, Klaúdios Ptolemaîos; Claudius Ptolemaeus) was a Greco-Roman mathematician, astronomer, geographer, astrologer, and poet of a single epigram in the Greek Anthology.
Retrograde motion in astronomy is, in general, orbital or rotational motion of an object in the direction opposite the rotation of its primary, that is the central object (right figure).
In geology, a rift is a linear zone where the lithosphere is being pulled apart and is an example of extensional tectonics.
In mathematics and physics, the right-hand rule is a common mnemonic for understanding orientation conventions for the vector cross product in three dimensions.
A ring system is a disc or ring orbiting an astronomical object that is composed of solid material such as dust and moonlets, and is a common component of satellite systems around giant planets.
The rings of Saturn are the most extensive ring system of any planet in the Solar System.
The rings of Uranus are a system of rings around the planet Uranus, intermediate in complexity between the more extensive set around Saturn and the simpler systems around Jupiter and Neptune.
Rock or stone is a natural substance, a solid aggregate of one or more minerals or mineraloids.
Rotation around a fixed axis or about a fixed axis of revolution or motion with respect to a fixed axis of rotation is a special case of rotational motion.
The Royal Navy (RN) is the United Kingdom's naval warfare force.
The President, Council and Fellows of the Royal Society of London for Improving Natural Knowledge, commonly known as the Royal Society, is a learned society.
The Royal Swedish Academy of Sciences or Kungliga Vetenskapsakademien is one of the Royal Academies of Sweden.
Sanskrit is the primary liturgical language of Hinduism; a philosophical language of Hinduism, Sikhism, Buddhism and Jainism; and a former literary language and lingua franca for the educated of ancient and medieval India.
Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter.
Saturn (Saturnus) is a god in ancient Roman religion, and a character in myth as a god of generation, dissolution, plenty, wealth, agriculture, periodic renewal and liberation.
The second is the SI base unit of time, commonly understood and historically defined as 1/86,400 of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds each.
In chemistry, a silicate is any member of a family of anions consisting of silicon and oxygen, usually with the general formula, where 0 ≤ x Silicate anions are often large polymeric molecules with an extense variety of structures, including chains and rings (as in polymeric metasilicate), double chains (as in, and sheets (as in. In geology and astronomy, the term silicate is used to mean silicate minerals, ionic solids with silicate anions; as well as rock types that consist predominantly of such minerals. In that context, the term also includes the non-ionic compound silicon dioxide (silica, quartz), which would correspond to x.
The Solar SystemCapitalization of the name varies.
Solar time is a calculation of the passage of time based on the position of the Sun in the sky.
The solar wind is a stream of charged particles released from the upper atmosphere of the Sun, called the corona.
A solstice is an event occurring when the Sun appears to reach its most northerly or southerly excursion relative to the celestial equator on the celestial sphere.
Southern Illinois University Edwardsville, (commonly abbreviated SIUE or The "e"), is a coeducational, public Master's college and university in Edwardsville, Illinois, United States about northeast of St. Louis, Missouri.
The Soviet Army (SA; Советская Армия, Sovetskaya Armiya) is the name given to the main land-based branch of the Soviet Armed Forces between February 1946 and December 1991, when it was replaced with the Russian Ground Forces, although it was not taken fully out of service until 25 December 1993.
Space weather is a branch of space physics and aeronomy concerned with the time varying conditions within the Solar System, including the solar wind, emphasizing the space surrounding the Earth, including conditions in the magnetosphere, ionosphere, thermosphere, and exosphere.
Space weathering is the type of weathering that occurs to any object exposed to the harsh environment of outer space.
Spectral bands are part of optical spectra of polyatomic systems, including condensed materials, large molecules, etc.
A spheroid, or ellipsoid of revolution, is a quadric surface obtained by rotating an ellipse about one of its principal axes; in other words, an ellipsoid with two equal semi-diameters.
In celestial mechanics, the standard gravitational parameter μ of a celestial body is the product of the gravitational constant G and the mass M of the body.
A star catalogue (Commonwealth English) or star catalog (American English), is an astronomical catalogue that lists stars.
A stipend is a form of salary, such as for an internship or apprenticeship.
The stratosphere is the second major layer of Earth's atmosphere, just above the troposphere, and below the mesosphere.
The Sun is the star at the center of the Solar System.
Superionic water is a phase of water under extreme heat and pressure which has properties of both a solid and a liquid, which is supported by some experimental evidence.
Taurus (Latin for "the Bull") is one of the constellations of the zodiac, which means it is crossed by the plane of the ecliptic.
A telescope is an optical instrument that aids in the observation of remote objects by collecting electromagnetic radiation (such as visible light).
The tesla (symbol T) is a derived unit of magnetic flux density (informally, magnetic field strength) in the International System of Units.
Thai, Central Thai, or Siamese, is the national and official language of Thailand and the first language of the Central Thai people and vast majority Thai of Chinese origin.
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The Washington Post is a major American daily newspaper founded on December 6, 1877.
Thermal conduction is the transfer of heat (internal energy) by microscopic collisions of particles and movement of electrons within a body.
The thermosphere is the layer of the Earth's atmosphere directly above the mesosphere and below the exosphere.
Tidal heating (also known as tidal working or tidal flexing) occurs through the tidal friction processes: orbital energy is dissipated as heat in either the surface ocean or interior of a planet or satellite.
Titan is the largest moon of Saturn.
In Greek mythology, the Titans (Greek: Τιτάν, Titán, Τiτᾶνες, Titânes) and Titanesses (or Titanides; Greek: Τιτανίς, Titanís, Τιτανίδες, Titanídes) were members of the second generation of divine beings, descending from the primordial deities and preceding the Olympians.
Triton is the largest natural satellite of the planet Neptune, and the first Neptunian moon to be discovered.
The tropopause is the boundary in the Earth's atmosphere between the troposphere and the stratosphere.
The troposphere is the lowest layer of Earth's atmosphere, and is also where nearly all weather conditions take place.
Ultraviolet (UV) is electromagnetic radiation with a wavelength from 10 nm to 400 nm, shorter than that of visible light but longer than X-rays.
Umbriel is a moon of Uranus discovered on October 24, 1851, by William Lassell.
The University of Nottingham is a public research university in Nottingham, United Kingdom.
Uranium is a chemical element with symbol U and atomic number 92.
Uranus is the seventh planet from the Sun.
Uranus (Ancient Greek Οὐρανός, Ouranos meaning "sky" or "heaven") was the primal Greek god personifying the sky and one of the Greek primordial deities.
The planet Uranus has appeared in various forms of fiction.
Uranus Pathfinder was a mission concept for the Uranian system evaluated in the 2010s by the ESA.
Urbain Jean Joseph Le Verrier (11 March 1811 – 23 September 1877) was a French mathematician who specialized in celestial mechanics and is best known for predicting the existence and position of Neptune using only mathematics.
A Van Allen radiation belt is a zone of energetic charged particles, most of which originate from the solar wind, that are captured by and held around a planet by that planet's magnetic field.
Vietnamese (Tiếng Việt) is an Austroasiatic language that originated in Vietnam, where it is the national and official language.
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye.
In planetary science, volatiles are the group of chemical elements and chemical compounds with low boiling points that are associated with a planet's or moon's crust or atmosphere.
Volgograd (p), formerly Tsaritsyn, 1589–1925, and Stalingrad, 1925–1961, is an important industrial city and the administrative centre of Volgograd Oblast, Russia, on the western bank of the Volga River.
Voyager 1 is a space probe launched by NASA on September 5, 1977.
Voyager 2 is a space probe launched by NASA on August 20, 1977, to study the outer planets.
The W. M. Keck Observatory is a two-telescope astronomical observatory at an elevation of 4,145 meters (13,600 ft) near the summit of Mauna Kea in the U.S. state of Hawaii.
The Wehrmacht (lit. "defence force")From wehren, "to defend" and Macht., "power, force".
Frederick William Herschel, (Friedrich Wilhelm Herschel; 15 November 1738 – 25 August 1822) was a German-born British astronomer, composer and brother of fellow astronomer Caroline Herschel, with whom he worked.
William Shakespeare (26 April 1564 (baptised)—23 April 1616) was an English poet, playwright and actor, widely regarded as both the greatest writer in the English language, and the world's pre-eminent dramatist.
Windsor is a historic market town and unparished area in the Royal Borough of Windsor and Maidenhead in Berkshire, England.
World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although conflicts reflecting the ideological clash between what would become the Allied and Axis blocs began earlier.
Zeta Tauri (ζ Tauri, abbreviated Zet Tau, ζ Tau) is a binary star in the zodiac constellation of Taurus, the Bull.
Zeus (Ζεύς, Zeús) is the sky and thunder god in ancient Greek religion, who rules as king of the gods of Mount Olympus.
The terms zonal and meridional are used to describe directions on a globe.
83982 Crantor, provisional designation, is a centaur in a 1:1 resonance with Uranus, approximately 60 kilometers in diameter.
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