id int64 39 79M | url stringlengths 31 227 | text stringlengths 6 334k | source stringlengths 1 150 ⌀ | categories listlengths 1 6 | token_count int64 3 71.8k | subcategories listlengths 0 30 |
|---|---|---|---|---|---|---|
11,825,534 | https://en.wikipedia.org/wiki/Gliese%20412 | Gliese 412 is a pair of stars that share a common proper motion through space and are thought to form a binary star system. The pair have an angular separation of 31.4″ at a position angle of 126.1°. They are located 15.8 light-years distant from the Sun in the constellation Ursa Major. Both components are relatively d... | Gliese 412 | [
"Astronomy"
] | 479 | [
"Astronomical X-ray sources",
"Ursa Major",
"Astronomical objects",
"Constellations"
] |
11,825,602 | https://en.wikipedia.org/wiki/LP%20944-20 | LP 944-20 is a dim brown dwarf of spectral class M9 located 21 light-years from the Solar System in the constellation of Fornax. With a visual apparent magnitude of 18.69, it has one of the dimmest visual magnitudes listed on the RECONS page. It is one of the brightest brown dwarfs, if not the brightest at JMKO=.
Disc... | LP 944-20 | [
"Astronomy"
] | 696 | [
"Fornax",
"Constellations"
] |
11,825,732 | https://en.wikipedia.org/wiki/DENIS%200255%E2%88%924700 | DENIS 0255−4700 is an extremely faint brown dwarf from the Solar System in the southern constellation of Eridanus. It is the closest isolated L-type brown dwarf (no undiscovered L-dwarfs are expected to be closer), and only after the binary Luhman 16. It is also the faintest brown dwarf (with the absolute magnitude of... | DENIS 0255−4700 | [
"Astronomy"
] | 358 | [
"Eridanus (constellation)",
"Constellations"
] |
11,825,946 | https://en.wikipedia.org/wiki/American%20Sleep%20Apnea%20Association | The American Sleep Apnea Association (ASAA) is a non-profit organization founded in 1990 by persons with sleep apnea, health care providers and researchers. The association offers education and advocacy services to improve the lives of sleep apnea patients.
In March 2016, the organization partnered with IBM Watson to ... | American Sleep Apnea Association | [
"Biology"
] | 101 | [
"Behavior",
"Sleep",
"Sleep disorders"
] |
11,826,062 | https://en.wikipedia.org/wiki/Auxiliary%20function | In mathematics, auxiliary functions are an important construction in transcendental number theory. They are functions that appear in most proofs in this area of mathematics and that have specific, desirable properties, such as taking the value zero for many arguments, or having a zero of high order at some point.
Def... | Auxiliary function | [
"Mathematics"
] | 2,187 | [
"Discrete mathematics",
"Mathematical relations",
"Diophantine approximation",
"Approximations",
"Number theory"
] |
11,827,482 | https://en.wikipedia.org/wiki/Wellcome%20Genome%20Campus | The Wellcome Genome Campus is a scientific research campus built in the grounds of Hinxton Hall, Hinxton in Cambridgeshire, England.
Campus
The Campus is home to some institutes and organisations in genomics and computational biology. The Campus is part of the Wellcome Trust, a global charitable foundation that exists... | Wellcome Genome Campus | [
"Chemistry",
"Biology"
] | 942 | [
"Molecular biology techniques",
"DNA sequencing",
"Biotechnology in the United Kingdom",
"Biotechnology by country"
] |
11,827,553 | https://en.wikipedia.org/wiki/Reciprocal%20Fibonacci%20constant | The reciprocal Fibonacci constant is the sum of the reciprocals of the Fibonacci numbers:
Because the ratio of successive terms tends to the reciprocal of the golden ratio, which is less than 1, the ratio test shows that the sum converges.
The value of is approximately
.
With terms, the series gives digits of ... | Reciprocal Fibonacci constant | [
"Mathematics"
] | 264 | [
"Recurrence relations",
"Irrational numbers",
"Fibonacci numbers",
"Mathematical objects",
"Golden ratio",
"Mathematical relations",
"nan",
"Mathematical constants",
"Numbers"
] |
11,827,758 | https://en.wikipedia.org/wiki/PEST%20sequence | A PEST sequence is a peptide sequence that is rich in proline (P), glutamic acid (E), serine (S) and threonine (T). It is associated with proteins that have a short intracellular half-life, so might act as a signal peptide for protein degradation. This may be mediated via the proteasome or calpain.
References
Peptide... | PEST sequence | [
"Chemistry"
] | 91 | [
"Biomolecules by chemical classification",
"Molecular and cellular biology stubs",
"Gene expression",
"Biochemical reactions",
"Biochemistry stubs",
"Post-translational modification",
"Molecular biology",
"Proteins"
] |
11,830,303 | https://en.wikipedia.org/wiki/Dissipative%20soliton | Dissipative solitons (DSs) are stable solitary localized structures that arise in nonlinear spatially extended dissipative systems due to mechanisms of self-organization. They can be considered as an extension of the classical soliton concept in conservative systems. An alternative terminology includes autosolitons, sp... | Dissipative soliton | [
"Mathematics"
] | 2,623 | [
"Self-organization",
"Dynamical systems"
] |
11,830,372 | https://en.wikipedia.org/wiki/Menger%20curvature | In mathematics, the Menger curvature of a triple of points in n-dimensional Euclidean space Rn is the reciprocal of the radius of the circle that passes through the three points. It is named after the Austrian-American mathematician Karl Menger.
Definition
Let x, y and z be three points in Rn; for simplicity, assume ... | Menger curvature | [
"Physics"
] | 694 | [
"Geometric measurement",
"Physical quantities",
"Curvature (mathematics)"
] |
11,830,463 | https://en.wikipedia.org/wiki/LIGO%20Scientific%20Collaboration | The LIGO Scientific Collaboration (LSC) is a scientific collaboration of international physics institutes and research groups dedicated to the search for gravitational waves.
History
The LSC was established in 1997, under the leadership of Barry Barish. Its mission is to ensure equal scientific opportunity for individ... | LIGO Scientific Collaboration | [
"Physics",
"Astronomy"
] | 392 | [
"Astronomical sub-disciplines",
"Gravitational-wave astronomy",
"Astrophysics"
] |
11,830,755 | https://en.wikipedia.org/wiki/Grotesque%20%28architecture%29 | In architecture, a grotesque () is a fantastic or mythical figure carved from stone and fixed to the walls or roof of a building. A chimera () is a type of grotesque depicting a mythical combination of multiple animals (sometimes including humans). Grotesque are often called gargoyles, although the term gargoyle refers... | Grotesque (architecture) | [
"Mathematics"
] | 2,590 | [
"Symbols",
"Visual motifs"
] |
11,830,903 | https://en.wikipedia.org/wiki/Cleveland%20Bridge%20%26%20Engineering%20Company | Cleveland Bridge & Engineering Company was a British bridge works and structural steel contractor based in Darlington. It was operational for 144 years.
From the founding of the company in 1877, it had a presence in Darlington. While initially focused on fabrication, the company became one of the major bridgebuilders ... | Cleveland Bridge & Engineering Company | [
"Engineering"
] | 1,471 | [
"Structural engineering",
"Structural steel"
] |
11,831,905 | https://en.wikipedia.org/wiki/Service-oriented%20device%20architecture | The purpose of service-oriented device architecture (SODA) is to enable devices to be connected to a service-oriented architecture (SOA). Currently, developers connect enterprise services to an enterprise service bus (ESB) using the various web service standards that have evolved since the advent of XML in 1998. With S... | Service-oriented device architecture | [
"Technology"
] | 121 | [
"Computing stubs"
] |
11,831,990 | https://en.wikipedia.org/wiki/Bloch%27s%20theorem%20%28complex%20analysis%29 | In complex analysis, a branch of mathematics, Bloch's theorem describes the behaviour of holomorphic functions defined on the unit disk. It gives a lower bound on the size of a disk in which an inverse to a holomorphic function exists. It is named after André Bloch.
Statement
Let f be a holomorphic function in the uni... | Bloch's theorem (complex analysis) | [
"Mathematics"
] | 1,251 | [
"Mathematical problems",
"Theorems in mathematical analysis",
"Unsolved problems in mathematics",
"Theorems in complex analysis"
] |
11,832,350 | https://en.wikipedia.org/wiki/Growth%20factor%20receptor | A growth factor receptor is a receptor that binds to a growth factor. Growth factor receptors are the first stop in cells where the signaling cascade for cell differentiation and proliferation begins. Growth factors, which are ligands that bind to the receptor are the initial step to activating the growth factor recept... | Growth factor receptor | [
"Chemistry"
] | 406 | [
"Receptors",
"Signal transduction"
] |
11,832,700 | https://en.wikipedia.org/wiki/List%20of%20abbreviations%20in%20oil%20and%20gas%20exploration%20and%20production | The oil and gas industry uses many acronyms and abbreviations. This list is meant for indicative purposes only and should not be relied upon for anything but general information.
#
1C – Proved contingent resources
1oo2 – One out of two voting (instrumentation)
1P – Proven reserves
2C – Proved and probable contingent ... | List of abbreviations in oil and gas exploration and production | [
"Chemistry",
"Engineering"
] | 18,825 | [
"Oil platforms",
"Structural engineering",
"Petroleum technology",
"Petroleum industry",
"Petroleum",
"Natural gas technology",
"Oil wells",
"Chemical process engineering"
] |
11,832,736 | https://en.wikipedia.org/wiki/Ryszard%20Engelking | Ryszard Engelking (16 November 1935 – 16 November 2023) was a Polish mathematician. He was working mainly on general topology and dimension theory. He is the author of several influential monographs in this field. The 1989 edition of his General Topology is nowadays a standard reference for topology. Engelking died on ... | Ryszard Engelking | [
"Mathematics"
] | 218 | [
"Topologists",
"Topology"
] |
47,353 | https://en.wikipedia.org/wiki/Subject%20and%20object%20%28philosophy%29 | The distinction between subject and object is a basic idea of philosophy.
A subject is a being that exercises agency, undergoes conscious experiences, and is situated in relation to other things that exist outside itself; thus, a subject is any individual, person, or observer.
An object is any of the things observed or... | Subject and object (philosophy) | [
"Physics"
] | 3,357 | [
"Physical objects",
"Matter"
] |
47,403 | https://en.wikipedia.org/wiki/Instrumentation | Instrumentation is a collective term for measuring instruments, used for indicating, measuring, and recording physical quantities. It is also a field of study about the art and science about making measurement instruments, involving the related areas of metrology, automation, and control theory. The term has its origin... | Instrumentation | [
"Technology",
"Engineering"
] | 3,173 | [
"Industrial engineering",
"Measuring instruments",
"Automation",
"Control engineering",
"Sensors",
"Industrial automation"
] |
47,433 | https://en.wikipedia.org/wiki/Atlas%20%28architecture%29 | In European architectural sculpture, an atlas (also known as an atlant, or atlante or atlantid; plural atlantes)<ref name="atlex">[http://www.artlex.com/ArtLex/Aru.html Aru-Az] , Michael Delahunt, ArtLex Art Dictionary , 1996–2008.</ref> is a support sculpted in the form of a man, which may take the place of a column,... | Atlas (architecture) | [
"Technology",
"Engineering"
] | 964 | [
"Structural system",
"Architectural history",
"Columns and entablature",
"Architecture"
] |
47,436 | https://en.wikipedia.org/wiki/Atlas%20%28topology%29 | In mathematics, particularly topology, an atlas is a concept used to describe a manifold. An atlas consists of individual charts that, roughly speaking, describe individual regions of the manifold. In general, the notion of atlas underlies the formal definition of a manifold and related structures such as vector bundle... | Atlas (topology) | [
"Mathematics"
] | 714 | [
"Topological spaces",
"Manifolds",
"Topology",
"Space (mathematics)"
] |
47,454 | https://en.wikipedia.org/wiki/Stratosphere | The stratosphere () is the second-lowest layer of the atmosphere of Earth, located above the troposphere and below the mesosphere. The stratosphere is composed of stratified temperature zones, with the warmer layers of air located higher (closer to outer space) and the cooler layers lower (closer to the planetary surfa... | Stratosphere | [
"Physics"
] | 2,304 | [
"Meteorological phenomena",
"Physical phenomena",
"Earth phenomena"
] |
47,473 | https://en.wikipedia.org/wiki/Algal%20bloom | An algal bloom or algae bloom is a rapid increase or accumulation in the population of algae in fresh water or marine water systems. It is often recognized by the discoloration in the water from the algae's pigments. The term algae encompasses many types of aquatic photosynthetic organisms, both macroscopic multicellul... | Algal bloom | [
"Chemistry",
"Biology",
"Environmental_science"
] | 3,248 | [
"Algae",
"Water treatment",
"Water pollution",
"Water quality indicators",
"Ecosystems",
"Aquatic ecology",
"Algal blooms"
] |
47,474 | https://en.wikipedia.org/wiki/Aperture | In optics, the aperture of an optical system (including a system consisted of a single lens) is a hole or an opening that primarily limits light propagated through the system. More specifically, the entrance pupil as the front side image of the aperture and focal length of an optical system determine the cone angle of ... | Aperture | [
"Astronomy"
] | 5,040 | [
"Observational astronomy",
"Astronomical sub-disciplines"
] |
47,476 | https://en.wikipedia.org/wiki/Altimeter | An altimeter or an altitude meter is an instrument used to measure the altitude of an object above a fixed level. The measurement of altitude is called altimetry, which is related to the term bathymetry, the measurement of depth under water.
Types
Pressure altimeter
Sonic altimeter
In 1931, the US Army Air Corps an... | Altimeter | [
"Technology",
"Engineering"
] | 586 | [
"Aircraft instruments",
"Measuring instruments",
"Altimeters"
] |
47,481 | https://en.wikipedia.org/wiki/Aquifer | An aquifer is an underground layer of water-bearing material, consisting of permeable or fractured rock, or of unconsolidated materials (gravel, sand, or silt). Aquifers vary greatly in their characteristics. The study of water flow in aquifers and the characterization of aquifers is called hydrogeology. Related terms ... | Aquifer | [
"Physics",
"Chemistry",
"Engineering",
"Environmental_science"
] | 3,901 | [
"Hydrology",
"Water supply",
"Physical systems",
"Hydraulics",
"Civil engineering",
"Aquifers",
"Environmental engineering",
"Hydraulic engineering",
"Hydrogeology"
] |
47,484 | https://en.wikipedia.org/wiki/Atmospheric%20pressure | Atmospheric pressure, also known as air pressure or barometric pressure (after the barometer), is the pressure within the atmosphere of Earth. The standard atmosphere (symbol: atm) is a unit of pressure defined as , which is equivalent to 1,013.25 millibars, 760mm Hg, 29.9212inchesHg, or 14.696psi. The atm unit is roug... | Atmospheric pressure | [
"Physics"
] | 2,184 | [
"Physical quantities",
"Meteorological quantities",
"Atmospheric pressure"
] |
47,486 | https://en.wikipedia.org/wiki/Atoll | An atoll () is a ring-shaped island, including a coral rim that encircles a lagoon. There may be coral islands or cays on the rim. Atolls are located in warm tropical or subtropical parts of the oceans and seas where corals can develop. Most of the approximately 440 atolls in the world are in the Pacific Ocean.
Two di... | Atoll | [
"Biology"
] | 2,414 | [
"Biogeomorphology"
] |
47,487 | https://en.wikipedia.org/wiki/Azimuth | An azimuth (; from ) is the horizontal angle from a cardinal direction, most commonly north, in a local or observer-centric spherical coordinate system.
Mathematically, the relative position vector from an observer (origin) to a point of interest is projected perpendicularly onto a reference plane (the horizontal pla... | Azimuth | [
"Physics",
"Astronomy",
"Mathematics",
"Engineering"
] | 1,733 | [
"Geometric measurement",
"Scalar physical quantities",
"Physical quantities",
"Applied mathematics",
"Horizontal coordinate system",
"Astronomical coordinate systems",
"Surveying",
"Civil engineering",
"Wikipedia categories named after physical quantities",
"Angle",
"Geodesy"
] |
47,488 | https://en.wikipedia.org/wiki/Barometer | A barometer is a scientific instrument that is used to measure air pressure in a certain environment. Pressure tendency can forecast short term changes in the weather. Many measurements of air pressure are used within surface weather analysis to help find surface troughs, pressure systems and frontal boundaries.
Barom... | Barometer | [
"Physics",
"Technology",
"Engineering"
] | 5,507 | [
"Meteorological instrumentation and equipment",
"Physical quantities",
"Measuring instruments",
"Meteorological quantities",
"Atmospheric pressure",
"Pressure gauges"
] |
47,490 | https://en.wikipedia.org/wiki/Biodegradation | Biodegradation is the breakdown of organic matter by microorganisms, such as bacteria and fungi. It is generally assumed to be a natural process, which differentiates it from composting. Composting is a human-driven process in which biodegradation occurs under a specific set of circumstances.
The process of biodegrada... | Biodegradation | [
"Chemistry",
"Engineering"
] | 4,421 | [
"Biodegradable waste management",
"Biodegradation",
"Anaerobic digestion",
"Environmental engineering",
"Water technology"
] |
47,492 | https://en.wikipedia.org/wiki/Biomass%20%28ecology%29 | Biomass is the mass of living biological organisms in a given area or ecosystem at a given time. Biomass can refer to species biomass, which is the mass of one or more species, or to community biomass, which is the mass of all species in the community. It can include microorganisms, plants or animals. The mass can be e... | Biomass (ecology) | [
"Mathematics",
"Biology"
] | 2,692 | [
"Ecology terminology",
"Symbiosis",
"Metrics",
"Ecological metrics",
"Quantity",
"Ecosystems"
] |
47,501 | https://en.wikipedia.org/wiki/Brightness%20temperature | Brightness temperature or radiance temperature is a measure of the intensity of electromagnetic energy coming from a source. In particular, it is the temperature at which a black body would have to be in order to duplicate the observed intensity of a grey body object at a frequency .
This concept is used in radio astro... | Brightness temperature | [
"Physics",
"Chemistry",
"Astronomy"
] | 849 | [
"Scalar physical quantities",
"Temperature",
"Thermodynamic properties",
"Physical quantities",
"SI base quantities",
"Intensive quantities",
"Radio astronomy",
"Thermodynamics",
"Planetary science",
"Wikipedia categories named after physical quantities",
"Astronomical sub-disciplines"
] |
47,502 | https://en.wikipedia.org/wiki/Calibration | In measurement technology and metrology, calibration is the comparison of measurement values delivered by a device under test with those of a calibration standard of known accuracy. Such a standard could be another measurement device of known accuracy, a device generating the quantity to be measured such as a voltage, ... | Calibration | [
"Physics",
"Mathematics"
] | 3,980 | [
"Quantity",
"Physical quantities",
"Measurement",
"Size"
] |
47,503 | https://en.wikipedia.org/wiki/Carbon%20cycle | The carbon cycle is that part of the biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of Earth. Other major biogeochemical cycles include the nitrogen cycle and the water cycle. Carbon is the main component of biological compounds as well as a maj... | Carbon cycle | [
"Chemistry",
"Biology"
] | 6,277 | [
"Photosynthesis",
"Chemical oceanography",
"Soil chemistry",
"Soil biology",
"Biochemistry"
] |
47,512 | https://en.wikipedia.org/wiki/Climate%20variability%20and%20change | Climate variability includes all the variations in the climate that last longer than individual weather events, whereas the term climate change only refers to those variations that persist for a longer period of time, typically decades or more. Climate change may refer to any time in Earth's history, but the term is no... | Climate variability and change | [
"Physics"
] | 7,387 | [
"Weather",
"Physical phenomena",
"Climate and weather statistics"
] |
47,520 | https://en.wikipedia.org/wiki/Coccolithophore | Coccolithophores, or coccolithophorids, are single-celled organisms which are part of the phytoplankton, the autotrophic (self-feeding) component of the plankton community. They form a group of about 200 species, and belong either to the kingdom Protista, according to Robert Whittaker's five-kingdom system, or clade Ha... | Coccolithophore | [
"Chemistry"
] | 7,632 | [
"Microfossils",
"Microscopy"
] |
47,521 | https://en.wikipedia.org/wiki/Condensation | Condensation is the change of the state of matter from the gas phase into the liquid phase, and is the reverse of vaporization. The word most often refers to the water cycle. It can also be defined as the change in the state of water vapor to liquid water when in contact with a liquid or solid surface or cloud conde... | Condensation | [
"Physics",
"Chemistry"
] | 983 | [
"Physical phenomena",
"Phase transitions",
"Critical phenomena",
"Phases of matter",
"Statistical mechanics",
"Matter"
] |
47,526 | https://en.wikipedia.org/wiki/Convection | Convection is single or multiphase fluid flow that occurs spontaneously through the combined effects of material property heterogeneity and body forces on a fluid, most commonly density and gravity (see buoyancy). When the cause of the convection is unspecified, convection due to the effects of thermal expansion and bu... | Convection | [
"Physics",
"Chemistry",
"Engineering"
] | 6,605 | [
"Transport phenomena",
"Physical phenomena",
"Convection",
"Civil engineering",
"Thermodynamics",
"Fluid mechanics"
] |
47,527 | https://en.wikipedia.org/wiki/Cryosphere | The cryosphere is an umbrella term for those portions of Earth's surface where water is in solid form. This includes sea ice, ice on lakes or rivers, snow, glaciers, ice caps, ice sheets, and frozen ground (which includes permafrost). Thus, there is a overlap with the hydrosphere. The cryosphere is an integral part of ... | Cryosphere | [
"Environmental_science"
] | 2,898 | [
"Cryosphere",
"Hydrology"
] |
47,535 | https://en.wikipedia.org/wiki/Haptophyte | The haptophytes, classified either as the Haptophyta, Haptophytina or Prymnesiophyta (named for Prymnesium), are a clade of algae.
The names Haptophyceae or Prymnesiophyceae are sometimes used instead. This ending implies classification at the class rank rather than as a division. Although the phylogenetics of this gr... | Haptophyte | [
"Biology"
] | 2,061 | [
"Algae",
"Algal taxonomy"
] |
47,544 | https://en.wikipedia.org/wiki/Carrying%20capacity | The carrying capacity of an environment is the maximum population size of a biological species that can be sustained by that specific environment, given the food, habitat, water, and other resources available. The carrying capacity is defined as the environment's maximal load, which in population ecology corresponds to... | Carrying capacity | [
"Mathematics"
] | 5,407 | [
"Ecological metrics",
"Quantity",
"Metrics"
] |
47,592 | https://en.wikipedia.org/wiki/Waveform | In electronics, acoustics, and related fields, the waveform of a signal is the shape of its graph as a function of time, independent of its time and magnitude scales and of any displacement in time. Periodic waveforms repeat regularly at a constant period. The term can also be used for non-periodic or aperiodic signals... | Waveform | [
"Physics"
] | 827 | [
"Waves",
"Physical phenomena",
"Waveforms"
] |
47,596 | https://en.wikipedia.org/wiki/Korean%20Peninsula%20Energy%20Development%20Organization | The Korean Peninsula Energy Development Organization (KEDO) was an organization founded on March 15, 1995, by the United States, South Korea, and Japan to implement the 1994 U.S.-North Korea Agreed Framework that froze North Korea's indigenous nuclear power plant development centered at the Yongbyon Nuclear Scientific ... | Korean Peninsula Energy Development Organization | [
"Engineering"
] | 941 | [
"International nuclear energy organizations",
"Nuclear organizations"
] |
47,600 | https://en.wikipedia.org/wiki/Simple%20group | In mathematics, a simple group is a nontrivial group whose only normal subgroups are the trivial group and the group itself. A group that is not simple can be broken into two smaller groups, namely a nontrivial normal subgroup and the corresponding quotient group. This process can be repeated, and for finite groups on... | Simple group | [
"Mathematics"
] | 2,055 | [
"Mathematical structures",
"Algebraic structures",
"Properties of groups"
] |
47,607 | https://en.wikipedia.org/wiki/Suspension%20bridge | A suspension bridge is a type of bridge in which the deck is hung below suspension cables on vertical suspenders. The first modern examples of this type of bridge were built in the early 1800s. Simple suspension bridges, which lack vertical suspenders, have a long history in many mountainous parts of the world.
Beside... | Suspension bridge | [
"Engineering"
] | 5,041 | [
"Structural engineering",
"Civil engineering",
"Construction"
] |
47,611 | https://en.wikipedia.org/wiki/Doomsday%20Clock | The Doomsday Clock is a symbol that represents the likelihood of a human-made global catastrophe, in the opinion of the members of the Bulletin of the Atomic Scientists. Created by J. Robert Oppenheimer, Albert Einstein & Eugene Rabinowitch and maintained since 1947, the Clock is a metaphor, not a prediction, for threa... | Doomsday Clock | [
"Physics",
"Chemistry",
"Technology",
"Engineering"
] | 2,586 | [
"Machines",
"Clocks",
"Measuring instruments",
"Alert measurement systems",
"Physical systems",
"Nuclear warfare",
"Warning systems",
"Radioactivity"
] |
47,625 | https://en.wikipedia.org/wiki/Yarkovsky%20effect | The Yarkovsky effect is a force acting on a rotating body in space caused by the anisotropic emission of thermal photons, which carry momentum. It is usually considered in relation to meteoroids or small asteroids (about 10 cm to 10 km in diameter), as its influence is most significant for these bodies.
History of dis... | Yarkovsky effect | [
"Physics",
"Materials_science",
"Engineering"
] | 1,497 | [
"Physical phenomena",
"Concepts in astrophysics",
"Classical mechanics",
"Rotation",
"Astrophysics",
"Materials science",
"Motion (physics)",
"Radiation",
"Condensed matter physics",
"Radiation effects"
] |
47,641 | https://en.wikipedia.org/wiki/Standard%20Model | The Standard Model of particle physics is the theory describing three of the four known fundamental forces (electromagnetic, weak and strong interactions – excluding gravity) in the universe and classifying all known elementary particles. It was developed in stages throughout the latter half of the 20th century, throug... | Standard Model | [
"Physics"
] | 5,764 | [
"Standard Model",
"Particle physics",
"nan"
] |
47,643 | https://en.wikipedia.org/wiki/Michel%20Foucault | Paul-Michel Foucault ( , ; ; 15 October 192625 June 1984) was a French historian of ideas and philosopher who was also an author, literary critic, political activist, and teacher. Foucault's theories primarily addressed the relationships between power versus knowledge and liberty, and he analyzed how they are used as ... | Michel Foucault | [
"Biology"
] | 19,823 | [
"Behavior",
"Sexuality",
"Historians of sexuality"
] |
47,651 | https://en.wikipedia.org/wiki/Reproducibility | Reproducibility, closely related to replicability and repeatability, is a major principle underpinning the scientific method. For the findings of a study to be reproducible means that results obtained by an experiment or an observational study or in a statistical analysis of a data set should be achieved again with a h... | Reproducibility | [
"Physics",
"Mathematics"
] | 2,801 | [
"Quantity",
"Physical quantities",
"Measurement",
"Size"
] |
47,671 | https://en.wikipedia.org/wiki/Toxic%20heavy%20metal | A toxic heavy metal is a common but misleading term for a metal-like element noted for its potential toxicity. Not all heavy metals are toxic and some toxic metals are not heavy. Elements often discussed as toxic include cadmium, mercury and lead, all of which appear in the World Health Organization's list of 10 chemi... | Toxic heavy metal | [
"Environmental_science"
] | 3,007 | [
"Toxicology"
] |
47,687 | https://en.wikipedia.org/wiki/Cosmic%20ray | Cosmic rays or astroparticles are high-energy particles or clusters of particles (primarily represented by protons or atomic nuclei) that move through space at nearly the speed of light. They originate from the Sun, from outside of the Solar System in our own galaxy, and from distant galaxies. Upon impact with Earth's ... | Cosmic ray | [
"Physics",
"Astronomy"
] | 8,043 | [
"Ionizing radiation",
"Physical phenomena",
"Concepts in astronomy",
"Astroparticle physics",
"Astrophysics",
"Radiation",
"Particle physics",
"Solar phenomena",
"Stellar phenomena",
"Cosmic rays"
] |
47,700 | https://en.wikipedia.org/wiki/Coral | Corals are colonial marine invertebrates within the subphylum Anthozoa of the phylum Cnidaria. They typically form compact colonies of many identical individual polyps. Coral species include the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton.
A coral "group" ... | Coral | [
"Biology"
] | 9,272 | [
"Biogeomorphology",
"Coral reefs"
] |
47,702 | https://en.wikipedia.org/wiki/Torture | Torture is the deliberate infliction of severe pain or suffering on a person for reasons including punishment, extracting a confession, interrogation for information, or intimidating third parties.
Some definitions restrict torture to acts carried out by the state, while others include non-state organizations. Most vi... | Torture | [
"Biology"
] | 5,846 | [
"Behavior",
"Aggression",
"Human behavior",
"Violence"
] |
47,711 | https://en.wikipedia.org/wiki/FreeCell | FreeCell is a solitaire card game played using the standard 52-card deck. It is fundamentally different from most solitaire games in that very few deals are unsolvable, and all cards are dealt face-up from the beginning of the game. Microsoft has included a FreeCell computer game with every release of the Windows opera... | FreeCell | [
"Mathematics"
] | 1,229 | [
"NP-complete problems",
"Mathematical problems",
"Computational problems"
] |
47,713 | https://en.wikipedia.org/wiki/Direct%20current | Direct current (DC) is one-directional flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through a conductor such as a wire, but can also flow through semiconductors, insulators, or even through a vacuum as in electron or ion beams. The electric current flows in a... | Direct current | [
"Physics",
"Engineering"
] | 2,028 | [
"Physical quantities",
"Electrical engineering",
"Power (physics)",
"Electric power",
"Electric current",
"Wikipedia categories named after physical quantities"
] |
47,717 | https://en.wikipedia.org/wiki/Srinivasa%20Ramanujan | Srinivasa Ramanujan Aiyangar
(22 December 188726 April 1920) was an Indian mathematician. Often regarded as one of the greatest mathematicians of all time, though he had almost no formal training in pure mathematics, he made substantial contributions to mathematical analysis, number theory, infinite series, and continu... | Srinivasa Ramanujan | [
"Mathematics"
] | 9,515 | [
"Pi-related people",
"Number theorists",
"Pi",
"Number theory"
] |
47,719 | https://en.wikipedia.org/wiki/Coulomb | The coulomb (symbol: C) is the unit of electric charge in the International System of Units (SI). It is defined to be equal to the electric charge delivered by a 1 ampere current in 1 second. It is used to define the elementary charge e.
Definition
The SI defines the coulomb as "the quantity of electricity carried in... | Coulomb | [
"Physics",
"Mathematics"
] | 743 | [
"Physical quantities",
"Electric charge",
"Quantity",
"Units of electrical charge",
"Units of measurement"
] |
47,732 | https://en.wikipedia.org/wiki/Fourier-transform%20spectroscopy | Fourier-transform spectroscopy (FTS) is a measurement technique whereby spectra are collected based on measurements of the coherence of a radiative source, using time-domain or space-domain measurements of the radiation, electromagnetic or not. It can be applied to a variety of types of spectroscopy including optical ... | Fourier-transform spectroscopy | [
"Physics",
"Chemistry"
] | 2,184 | [
"Instrumental analysis",
"Molecular physics",
"Spectroscopy",
"Spectrum (physical sciences)"
] |
47,742 | https://en.wikipedia.org/wiki/Brooklyn%20Bridge | The Brooklyn Bridge is a hybrid cable-stayed/suspension bridge in New York City, spanning the East River between the boroughs of Manhattan and Brooklyn. Opened on May 24, 1883, the Brooklyn Bridge was the first fixed crossing of the East River. It was also the longest suspension bridge in the world at the time of its o... | Brooklyn Bridge | [
"Engineering"
] | 14,006 | [
"Civil engineering",
"Historic Civil Engineering Landmarks"
] |
47,756 | https://en.wikipedia.org/wiki/List%20of%20small%20groups | The following list in mathematics contains the finite groups of small order up to group isomorphism.
Counts
For n = 1, 2, … the number of nonisomorphic groups of order n is
1, 1, 1, 2, 1, 2, 1, 5, 2, 2, 1, 5, 1, 2, 1, 14, 1, 5, 1, 5, ...
For labeled groups, see .
Glossary
Each group is named by Small Groups libra... | List of small groups | [
"Mathematics"
] | 1,392 | [
"Mathematical tables",
"Mathematical structures",
"Algebraic structures",
"Finite groups"
] |
47,761 | https://en.wikipedia.org/wiki/Hitchhiking | Hitchhiking (also known as thumbing, autostop or hitching) is a means of transportation that is gained by asking individuals, usually strangers, for a ride in their car or other vehicle. The ride is usually, but not always, free.
Signaling methods
Hitchhikers use a variety of signals to indicate they need a ride. Ind... | Hitchhiking | [
"Physics"
] | 1,974 | [
"Physical systems",
"Transport",
"Sustainable transport"
] |
47,763 | https://en.wikipedia.org/wiki/Environmental%20economics | Environmental economics is a sub-field of economics concerned with environmental issues. It has become a widely studied subject due to growing environmental concerns in the twenty-first century. Environmental economics "undertakes theoretical or empirical studies of the economic effects of national or local environment... | Environmental economics | [
"Chemistry",
"Engineering",
"Environmental_science"
] | 3,952 | [
"Industrial engineering",
"Environmental economics",
"Environmental engineering",
"Industrial ecology",
"Environmental social science"
] |
47,768 | https://en.wikipedia.org/wiki/Texas%20Instruments | Texas Instruments Incorporated (TI) is an American multinational semiconductor company headquartered in Dallas, Texas. It is one of the top 10 semiconductor companies worldwide based on sales volume. The company's focus is on developing analog chips and embedded processors, which account for more than 80% of its reven... | Texas Instruments | [
"Technology"
] | 5,477 | [
"Computer hardware companies",
"Computers"
] |
47,769 | https://en.wikipedia.org/wiki/Transistor%E2%80%93transistor%20logic | Transistor–transistor logic (TTL) is a logic family built from bipolar junction transistors. Its name signifies that transistors perform both the logic function (the first "transistor") and the amplifying function (the second "transistor"), as opposed to earlier resistor–transistor logic (RTL) and diode–transistor logi... | Transistor–transistor logic | [
"Engineering"
] | 4,468 | [
"Electronic engineering",
"Digital electronics"
] |
47,786 | https://en.wikipedia.org/wiki/Environmental%20finance | Environmental finance is a field within finance that employs market-based environmental policy instruments to improve the ecological impact of investment strategies. The primary objective of environmental finance is to regress the negative impacts of climate change through pricing and trading schemes. The field of envi... | Environmental finance | [
"Environmental_science"
] | 2,147 | [
"Environmental economics",
"Environmental social science"
] |
47,796 | https://en.wikipedia.org/wiki/Patience | Patience, or forbearance, is the ability to endure difficult or undesired long-term circumstances. Patience involves perseverance or tolerance in the face of delay, provocation, or stress without responding negatively, such as reacting with disrespect or anger. Patience is also used to refer to the character trait of b... | Patience | [
"Physics",
"Biology"
] | 2,090 | [
"Behavior",
"Physical quantities",
"Time",
"Spirituality",
"Time management",
"Spacetime",
"Human behavior"
] |
47,868 | https://en.wikipedia.org/wiki/Data%20stream | In connection-oriented communication, a data stream is the transmission of a sequence of digitally encoded signals to convey information. Typically, the transmitted symbols are grouped into a series of packets.
Data streaming has become ubiquitous. Anything transmitted over the Internet is transmitted as a data stream... | Data stream | [
"Technology"
] | 1,080 | [
"Computing terminology",
"Data",
"Big data"
] |
47,902 | https://en.wikipedia.org/wiki/Upload | Uploading refers to transmitting data from one computer system to another through means of a network. Common methods of uploading include: uploading via web browsers, FTP clients, and terminals (SCP/SFTP). Uploading can be used in the context of (potentially many) clients that send files to a central server. While uplo... | Upload | [
"Technology",
"Engineering"
] | 1,304 | [
"Computer networking",
"Computer science",
"Computer engineering"
] |
47,921 | https://en.wikipedia.org/wiki/Free%20will | Free will is the capacity or ability to choose between different possible courses of action.
Free will is closely linked to the concepts of moral responsibility, praise, culpability, and other judgements which apply only to actions that are freely chosen. It is also connected with the concepts of advice, persuasion, d... | Free will | [
"Physics"
] | 21,035 | [] |
47,922 | https://en.wikipedia.org/wiki/Determinism | Determinism is the philosophical view that all events in the universe, including human decisions and actions, are causally inevitable. Deterministic theories throughout the history of philosophy have developed from diverse and sometimes overlapping motives and considerations. Like eternalism, determinism focuses on par... | Determinism | [
"Physics"
] | 8,686 | [] |
47,949 | https://en.wikipedia.org/wiki/Union%20%28set%20theory%29 | In set theory, the union (denoted by ∪) of a collection of sets is the set of all elements in the collection. It is one of the fundamental operations through which sets can be combined and related to each other.
A refers to a union of zero () sets and it is by definition equal to the empty set.
For explanation of t... | Union (set theory) | [
"Mathematics"
] | 879 | [
"Boolean algebra",
"Set theory",
"Mathematical logic",
"Fields of abstract algebra",
"Basic concepts in set theory",
"Operations on sets"
] |
47,964 | https://en.wikipedia.org/wiki/Horse%20teeth | Horse teeth refers to the dentition of equine species, including horses and donkeys. Equines are both heterodontous and diphyodontous, which means that they have teeth in more than one shape (there are up to five shapes of tooth in a horse's mouth), and have two successive sets of teeth, the deciduous ("baby teeth") a... | Horse teeth | [
"Biology"
] | 3,143 | [
"Senescence",
"Senescence in non-human organisms"
] |
47,966 | https://en.wikipedia.org/wiki/Cattle%20age%20determination | The age of cattle is determined chiefly by examination of the teeth, and less perfectly by the horn rings or the length of the tail brush; due to bang-tailing, which is the act of cutting the long hairs at the tip of the tail short to identify the animal after management practices, the last method is the least reliable... | Cattle age determination | [
"Biology"
] | 1,046 | [
"Senescence",
"Senescence in non-human organisms"
] |
47,967 | https://en.wikipedia.org/wiki/Authentication | Authentication (from authentikos, "real, genuine", from αὐθέντης authentes, "author") is the act of proving an assertion, such as the identity of a computer system user. In contrast with identification, the act of indicating a person or thing's identity, authentication is the process of verifying that identity. It mig... | Authentication | [
"Engineering"
] | 3,891 | [
"Cybersecurity engineering",
"Computer access control"
] |
48,020 | https://en.wikipedia.org/wiki/Urban%20growth%20boundary | An urban growth boundary (UGB) is a regional boundary, set in an attempt to control urban sprawl by, in its simplest form, mandating that the area inside the boundary be used for urban development and the area outside be preserved in its natural state or used for agriculture. Legislating for an urban growth boundary is... | Urban growth boundary | [
"Engineering"
] | 2,293 | [
"Urban planning",
"Architecture"
] |
48,029 | https://en.wikipedia.org/wiki/Valerie%20Solanas | Valerie Jean Solanas (April 9, 1936 – April 25, 1988) was an American radical feminist known for the SCUM Manifesto, which she self-published in 1967, and her attempt to murder artist Andy Warhol in 1968.
On June 3, 1968, Solanas went to The Factory, shot Warhol and art critic Mario Amaya, and attempted to shoot Warho... | Valerie Solanas | [
"Biology"
] | 5,410 | [
"Behavior",
"Aggression",
"Stalking"
] |
48,043 | https://en.wikipedia.org/wiki/Routing%20table | In computer networking, a routing table, or routing information base (RIB), is a data table stored in a router or a network host that lists the routes to particular network destinations, and in some cases, metrics (distances) associated with those routes. The routing table contains information about the topology of the... | Routing table | [
"Technology"
] | 1,311 | [
"Internet architecture",
"IT infrastructure"
] |
48,049 | https://en.wikipedia.org/wiki/Autonomous%20robot | An autonomous robot is a robot that acts without recourse to human control. Historic examples include space probes. Modern examples include self-driving vacuums and cars.
Industrial robot arms that work on assembly lines inside factories may also be considered autonomous robots, though their autonomy is restricted due... | Autonomous robot | [
"Physics",
"Technology",
"Biology"
] | 3,626 | [
"Machines",
"Behavior",
"Reproduction",
"Robots",
"Self-replication",
"Physical systems"
] |
48,063 | https://en.wikipedia.org/wiki/Fibonacci%20coding | In mathematics and computing, Fibonacci coding is a universal code which encodes positive integers into binary code words. It is one example of representations of integers based on Fibonacci numbers. Each code word ends with "11" and contains no other instances of "11" before the end.
The Fibonacci code is closely rel... | Fibonacci coding | [
"Mathematics"
] | 1,015 | [
"Fibonacci numbers",
"Mathematical relations",
"Golden ratio",
"Recurrence relations"
] |
48,065 | https://en.wikipedia.org/wiki/Polder | A polder () is a low-lying tract of land that forms an artificial hydrological entity, enclosed by embankments known as dikes. The three types of polder are:
Land reclaimed from a body of water, such as a lake or the seabed
Flood plains separated from the sea or river by a dike
Marshes separated from the surroundi... | Polder | [
"Engineering",
"Environmental_science"
] | 2,556 | [
"Hydrology",
"Environmental soil science",
"Construction",
"Coastal construction",
"Riparian zone"
] |
48,082 | https://en.wikipedia.org/wiki/Great%20circle | In mathematics, a great circle or orthodrome is the circular intersection of a sphere and a plane passing through the sphere's center point.
Discussion
Any arc of a great circle is a geodesic of the sphere, so that great circles in spherical geometry are the natural analog of straight lines in Euclidean space. For any... | Great circle | [
"Mathematics"
] | 871 | [
"Elementary mathematics",
"Elementary geometry",
"Circles",
"Pi"
] |
48,085 | https://en.wikipedia.org/wiki/Virtual%20management | Virtual management is the supervision, leadership, and maintenance of virtual teams—dispersed work groups that rarely meet face to face. As the number of virtual teams has grown, facilitated by the Internet, globalization, outsourcing, and remote work, the need to manage them has also grown. The challenging task of man... | Virtual management | [
"Technology"
] | 3,347 | [
"Information technology",
"Information technology management"
] |
48,113 | https://en.wikipedia.org/wiki/SWIFT | The Society for Worldwide Interbank Financial Telecommunication (Swift), legally S.W.I.F.T. SC, is a cooperative established in 1973 in Belgium () and owned by the banks and other member firms that use its service. SWIFT provides the main messaging network through which international payments are initiated. It also sel... | SWIFT | [
"Technology",
"Engineering"
] | 4,988 | [
"Network architecture",
"Market data",
"Data",
"Computer networks engineering"
] |
48,134 | https://en.wikipedia.org/wiki/Temple | A temple (from the Latin ) is a place of worship, a building used for spiritual rituals and activities such as prayer and sacrifice. By convention, the specially built places of worship of some religions are commonly called "temple" in English, while those of other religions are not, even though they fulfill very simi... | Temple | [
"Engineering"
] | 5,363 | [
"Sacral architecture",
"Architecture"
] |
48,144 | https://en.wikipedia.org/wiki/Microcomputer | A microcomputer is a small, relatively inexpensive computer having a central processing unit (CPU) made out of a microprocessor. The computer also includes memory and input/output (I/O) circuitry together mounted on a printed circuit board (PCB). Microcomputers became popular in the 1970s and 1980s with the advent of i... | Microcomputer | [
"Technology"
] | 3,067 | [
"Computers"
] |
48,164 | https://en.wikipedia.org/wiki/Maximal%20ideal | In mathematics, more specifically in ring theory, a maximal ideal is an ideal that is maximal (with respect to set inclusion) amongst all proper ideals. In other words, I is a maximal ideal of a ring R if there are no other ideals contained between I and R.
Maximal ideals are important because the quotients of rings b... | Maximal ideal | [
"Mathematics"
] | 1,505 | [
"Fields of abstract algebra",
"Ring theory"
] |
48,167 | https://en.wikipedia.org/wiki/Congruence%20relation | In abstract algebra, a congruence relation (or simply congruence) is an equivalence relation on an algebraic structure (such as a group, ring, or vector space) that is compatible with the structure in the sense that algebraic operations done with equivalent elements will yield equivalent elements. Every congruence rel... | Congruence relation | [
"Mathematics"
] | 1,555 | [
"Universal algebra",
"Binary relations",
"Number theory",
"Fields of abstract algebra",
"Arithmetic",
"Mathematical relations",
"Abstract algebra",
"Modular arithmetic",
"Algebra"
] |
48,172 | https://en.wikipedia.org/wiki/List%20of%20mental%20disorders | The following is a list of mental disorders as defined at any point by the Diagnostic and Statistical Manual of Mental Disorders (DSM) or the International Classification of Diseases (ICD). A mental disorder, also known as a mental illness, mental health condition, or psychiatric disorder, is characterized by a pattern... | List of mental disorders | [
"Biology"
] | 2,569 | [
"Mental disorders",
"Behavior",
"Human behavior"
] |
48,179 | https://en.wikipedia.org/wiki/PINO | The Open PINO Platform (or just PINO) is an open humanoid robot platform, with its mechanical and software design covered by the GNU Free Documentation License and GNU General Public License respectively.
The external housing design of the PINO is a proprietary registered design, and the term PINO is trademarked.
The... | PINO | [
"Technology"
] | 146 | [
"Social robots",
"Computing and society"
] |
48,187 | https://en.wikipedia.org/wiki/William%20Ramsay | Sir William Ramsay (; 2 October 1852 – 23 July 1916) was a Scottish chemist who discovered the noble gases and received the Nobel Prize in Chemistry in 1904 "in recognition of his services in the discovery of the inert gaseous elements in air" along with his collaborator, John William Strutt, 3rd Baron Rayleigh, who r... | William Ramsay | [
"Chemistry",
"Materials_science"
] | 1,350 | [
"Chemical process engineering",
"Noble gases",
"Industrial gases",
"Nonmetals"
] |
48,193 | https://en.wikipedia.org/wiki/Camera%20obscura | A camera obscura (; ) is the natural phenomenon in which the rays of light passing through a small hole into a dark space form an image where they strike a surface, resulting in an inverted (upside down) and reversed (left to right) projection of the view outside.
Camera obscura can also refer to analogous constructio... | Camera obscura | [
"Materials_science",
"Engineering"
] | 7,059 | [
"Glass engineering and science",
"Optical devices"
] |
48,203 | https://en.wikipedia.org/wiki/Article%20%28grammar%29 | In grammar, an article is any member of a class of dedicated words that are used with noun phrases to mark the identifiability of the referents of the noun phrases. The category of articles constitutes a part of speech.
In English, both "the" and "a(n)" are articles, which combine with nouns to form noun phrases. Arti... | Article (grammar) | [
"Technology"
] | 5,932 | [
"Parts of speech",
"Components"
] |
48,209 | https://en.wikipedia.org/wiki/Gas%20laws | The laws describing the behaviour of gases under fixed pressure, volume, amount of gas, and absolute temperature conditions are called gas laws. The basic gas laws were discovered by the end of the 18th century when scientists found out that relationships between pressure, volume and temperature of a sample of gas coul... | Gas laws | [
"Physics",
"Chemistry"
] | 1,663 | [
"History of thermodynamics",
"Thermodynamics",
"Gas laws"
] |
48,211 | https://en.wikipedia.org/wiki/Golomb%20ruler | In mathematics, a Golomb ruler is a set of marks at integer positions along a ruler such that no two pairs of marks are the same distance apart. The number of marks on the ruler is its order, and the largest distance between two of its marks is its length. Translation and reflection of a Golomb ruler are considered tri... | Golomb ruler | [
"Mathematics",
"Engineering"
] | 958 | [
"Discrete mathematics",
"Distributed computing projects",
"Number theory",
"Information technology projects"
] |
48,230 | https://en.wikipedia.org/wiki/Polychlorinated%20biphenyl | Polychlorinated biphenyls (PCBs) are organochlorine compounds with the formula C12H10−xClx; they were once widely used in the manufacture of carbonless copy paper, as heat transfer fluids, and as dielectric and coolant fluids for electrical equipment. They are highly toxic and carcinogenic chemical compounds, formerly ... | Polychlorinated biphenyl | [
"Chemistry",
"Environmental_science"
] | 12,717 | [
"Persistent organic pollutants under the Stockholm Convention",
"Endocrine disruptors",
"Persistent organic pollutants under the Convention on Long-Range Transboundary Air Pollution",
"Synthetic materials",
"Environmental chemistry",
"Soil contamination",
"Chemical synthesis"
] |
48,232 | https://en.wikipedia.org/wiki/Phenyl%20group | In organic chemistry, the phenyl group, or phenyl ring, is a cyclic group of atoms with the formula , and is often represented by the symbol Ph (archaically φ) or Ø. The phenyl group is closely related to benzene and can be viewed as a benzene ring, minus a hydrogen, which may be replaced by some other element or compo... | Phenyl group | [
"Chemistry"
] | 1,206 | [
"Substituents",
"Aryl groups",
"Functional groups"
] |
48,239 | https://en.wikipedia.org/wiki/Celestial%20sphere | In astronomy and navigation, the celestial sphere is an abstract sphere that has an arbitrarily large radius and is concentric to Earth. All objects in the sky can be conceived as being projected upon the inner surface of the celestial sphere, which may be centered on Earth or the observer. If centered on the observer,... | Celestial sphere | [
"Astronomy",
"Mathematics"
] | 2,476 | [
"Astronomical coordinate systems",
"Coordinate systems"
] |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.