{"/e/astronomical-x-ray-sources/low-mass-x-ray-binary/": {"t": "Low-mass X-ray binary", "s": "Binary systems where a compact object accretes from a low-mass star."}, "https://codexery.com/binary-and-multiple-stars/e/binary-and-multiple-stars/astrometric-binary/": {"t": "Astrometric binary", "s": "Some stars appear to circle an invisible point."}, "https://codexery.com/astronomy-space/e/astronomy-and-space/main-sequence/": {"t": "Main sequence", "s": "Stars spend most of their lives on the main sequence."}, "https://codexery.com/stellar-evolution/e/stellar-evolution/white-dwarf/": {"t": "White dwarf", "s": "A compact star supported by electron degeneracy pressure."}, "https://codexery.com/cosmic-mysteries/e/cosmic-mysteries/neutron-stars/": {"t": "Neutron stars", "s": "Gravitationally collapsed cores of massive stars, second only to black holes."}, "https://codexery.com/black-holes/e/black-holes/black-hole/": {"t": "Black hole", "s": "An astronomical body from which nothing, not even light, can escape.", "i": "https://codexery.com/black-holes/img/black-holes/black-hole.webp", "c": "Event Horizon Telescope, uploader cropped and converted TIF to JPG · via Wikipedia: Black hole · CC BY 4.0"}, "https://codexery.com/particle-and-nuclear-physics/e/particle-and-nuclear-physics/nuclear-fusion/": {"t": "Nuclear fusion", "s": "Nuclear fusion combines nuclei, releasing energy that powers stars and weapons."}, "https://codexery.com/particle-and-nuclear-physics/e/particle-and-nuclear-physics/positron/": {"t": "Positron", "s": "First antimatter particle, predicted by Dirac, discovered by Anderson."}, "https://codexery.com/binary-and-multiple-stars/e/binary-and-multiple-stars/roche-lobe/": {"t": "Roche lobe", "s": "Boundary defining gravitational capture in binary star systems."}, "https://codexery.com/planets-stellar-astronomy/e/planets-and-stellar-astronomy/red-giant/": {"t": "Red giant", "s": "A late-phase, luminous giant star with an inflated atmosphere."}, "https://codexery.com/spiral-galaxies/e/spiral-galaxies/milky-way/": {"t": "Milky Way", "s": "The barred spiral galaxy containing the Solar System."}, "https://codexery.com/globular-clusters/e/globular-clusters/globular-cluster/": {"t": "Globular cluster", "s": "Spheroidal star clusters bound by gravity, found in galactic halos."}, "https://codexery.com/space-telescopes/e/space-telescopes/chandra-x-ray-observatory/": {"t": "Chandra X-ray Observatory", "s": "Flagship X-ray telescope launched in 1999, still operating."}, "https://codexery.com/electromagnetism/e/electromagnetism/electromagnetic-radiation/": {"t": "Electromagnetic radiation", "s": "Self-propagating wave of the electromagnetic field carrying energy."}, "https://codexery.com/binary-and-multiple-stars/e/binary-and-multiple-stars/accretion-disk/": {"t": "Accretion disk", "s": "Accretion disks are ubiquitous structures that drive mass onto central objects."}, "https://codexery.com/variable-stars/e/variable-stars/x-ray-burster/": {"t": "X-ray burster", "s": "X-ray bursters are neutron-star binaries emitting periodic X-ray flashes."}, "https://codexery.com/stellar-phenomena/e/stellar-phenomena/supergiant/": {"t": "Supergiant", "s": "Massive, luminous stars at the top of the Hertzsprung–Russell diagram."}, "https://codexery.com/neutron-stars/e/neutron-stars/thorne-ytkow-object/": {"t": "Thorne–Żytkow object", "s": "A hybrid star with a neutron star core inside a red giant."}, "https://codexery.com/stars-and-stellar-phenomena/e/stars-and-stellar-phenomena/be-star/": {"t": "Be star", "s": "Non-supergiant B stars with Balmer emission lines, often surrounded by a gaseous disk."}, "https://codexery.com/variable-stars/e/variable-stars/ss-433/": {"t": "SS 433", "s": "First discovered microquasar with relativistic jets and precessing accretion disk.", "i": "https://codexery.com/variable-stars/img/variable-stars/ss-433.webp", "c": "(Credit: X-ray: NASA/CXC/U.Amsterdam/S.Migliari et al., Radio: G.M. Dubner, et a · Public domain"}, "https://codexery.com/stars-and-stellar-phenomena/e/stars-and-stellar-phenomena/effective-temperature/": {"t": "Effective temperature", "s": "Black-body temperature matching a star or planet's radiated energy."}, "https://codexery.com/elliptical-and-irregular-galaxies/e/elliptical-and-irregular-galaxies/large-magellanic-cloud/": {"t": "Large Magellanic Cloud", "s": "A dwarf satellite galaxy of the Milky Way, rich in gas and star formation."}, "https://codexery.com/elliptical-and-irregular-galaxies/e/elliptical-and-irregular-galaxies/small-magellanic-cloud/": {"t": "Small Magellanic Cloud", "s": "A dwarf irregular galaxy and naked-eye object near the Milky Way."}, "https://codexery.com/astronomy-space/e/astronomy-and-space/nova/": {"t": "Nova", "s": "A stellar explosion on a white dwarf in a binary system."}, "https://codexery.com/rosat-objects/e/rosat-objects/rosat/": {"t": "ROSAT", "s": "German-led X-ray telescope that surveyed the entire X-ray sky."}, "https://codexery.com/stars-of-dorado/e/stars-of-dorado/rx-j0439-8-6809/": {"t": "RX J0439.8−6809", "s": "The hottest known white dwarf, at 250,000 Kelvin."}, "https://codexery.com/mechanics-and-fluid-dynamics/e/mechanics-and-fluid-dynamics/instability/": {"t": "Instability", "s": "Instability describes systems where perturbations grow without bounds."}, "https://codexery.com/classical-mechanics/e/classical-mechanics/density/": {"t": "Density", "s": "Mass per unit volume, an intensive property of matter."}, "https://codexery.com/thermodynamics-and-statistical-mechanics/e/thermodynamics-and-statistical-mechanics/temperature/": {"t": "Temperature", "s": "Temperature measures average particle kinetic energy and thermal energy distribution."}, "https://codexery.com/variable-stars/e/variable-stars/v-sagittae/": {"t": "V Sagittae", "s": "The only super soft X-ray non-magnetic cataclysmic variable known."}, "https://codexery.com/black-holes/e/black-holes/tidal-disruption-event/": {"t": "Tidal disruption event", "s": "A star torn apart by a supermassive black hole."}, "https://codexery.com/chemistry/e/chemistry/electronvolt/": {"t": "Electronvolt", "s": "Unit of energy gained by an electron through one volt."}, "https://codexery.com/astronomers-and-astrophysicists/e/astronomers-and-astrophysicists/riccardo-giacconi/": {"t": "Riccardo Giacconi", "s": "Italian-American astrophysicist who pioneered X-ray astronomy.", "i": "https://codexery.com/astronomers-and-astrophysicists/img/astronomers-and-astrophysicists/riccardo-giacconi.webp", "c": "NASA/MSFC · via Wikipedia: Riccardo Giacconi · Public domain"}, "https://codexery.com/stars-and-stellar-objects/e/stars-and-stellar-objects/active-galactic-nucleus/": {"t": "Active galactic nucleus", "s": "Compact region at a galaxy's center emitting non-stellar radiation, powered by accretion onto a supermassive black hole."}, "https://codexery.com/galaxy-clusters-and-groups/e/galaxy-clusters-and-groups/galaxy-cluster/": {"t": "Galaxy cluster", "s": "Largest gravitationally bound structures, composed of galaxies, gas, and dark matter."}, "https://codexery.com/astrophotography/e/astrophotography/x-ray-astronomy/": {"t": "X-ray astronomy", "s": "Observing the universe in X-rays from above Earth's atmosphere."}, "https://codexery.com/solar-telescopes/e/solar-telescopes/x-ray-telescope/": {"t": "X-ray telescope", "s": "X-ray telescopes observe high-energy celestial sources from above Earth's atmosphere."}, "https://codexery.com/omniscient-readers-viewpoint/e/world/earth/": {"t": "Earth", "s": "Kim Dokja's world, divided into scenario domes."}, "https://codexery.com/stars-and-stellar-objects/e/stars-and-stellar-objects/constellation/": {"t": "Constellation", "s": "Patterns in the sky that guide stories and navigation."}, "https://codexery.com/named-stars/e/named-stars/sun/": {"t": "Sun", "s": "The Sun is the central star of the Solar System."}, "https://codexery.com/astronomical-concepts-and-techniques/e/astronomical-concepts-and-techniques/zodiac/": {"t": "Zodiac", "s": "A celestial coordinate system dividing the ecliptic into 12 signs."}, "https://codexery.com/constellations/e/constellations/ophiuchus/": {"t": "Ophiuchus", "s": "A large equatorial constellation representing a serpent-bearer."}, "https://codexery.com/stars-of-bo-tes/e/stars-of-bo-tes/bo-tes/": {"t": "Boötes", "s": "A northern constellation featuring the bright star Arcturus."}, "https://codexery.com/space-missions/e/space-missions/the-hubble-space-telescope/": {"t": "The Hubble Space Telescope", "s": "A versatile space telescope observing ultraviolet, visible, and near-infrared light."}, "https://codexery.com/astronomy/e/astronomy/crab-nebula/": {"t": "Crab Nebula", "s": "A supernova remnant and pulsar wind nebula in Taurus, linked to a supernova observed in AD 1054.", "i": "https://codexery.com/astronomy/img/astronomy/crab-nebula.webp", "c": "via Wikipedia: Crab Nebula · see source"}, "https://codexery.com/constellations/e/constellations/ara-constellation/": {"t": "Ara (constellation)", "s": "A southern constellation representing an altar, rich in star clusters."}, "https://codexery.com/stellar-phenomena/e/stellar-phenomena/soft-x-ray-transient/": {"t": "Soft X-ray transient", "s": "Binary systems with a compact object and low-mass star showing dramatic X-ray outbursts."}, "https://codexery.com/satellites/e/satellites/satellite/": {"t": "Satellite", "s": "Artificial objects placed into orbit around a celestial body."}, "/e/astronomical-x-ray-sources/x-ray-binary/": {"t": "X-ray binary", "s": "Binary stars luminous in X-rays, powered by accretion onto a compact object.", "i": "https://codexery.com/astronomical-x-ray-sources/img/astronomical-x-ray-sources/x-ray-binary.webp", "c": "(Credit: NASA/CXC/M.Weiss) · Public domain"}, "https://codexery.com/astronomy-space/e/astronomy-and-space/luminosity/": {"t": "Luminosity", "s": "Absolute measure of radiated electromagnetic energy per unit time."}, "https://codexery.com/electromagnetism/e/electromagnetism/electromagnetic-spectrum/": {"t": "Electromagnetic spectrum", "s": "The full range of electromagnetic radiation, from radio to gamma rays."}, "https://codexery.com/cosmic-mysteries/e/cosmic-mysteries/gamma-ray-bursts/": {"t": "Gamma-ray bursts", "s": "Extremely energetic explosions in distant galaxies."}, "https://codexery.com/astronomical-concepts-and-techniques/e/astronomical-concepts-and-techniques/time-domain-astronomy/": {"t": "Time-domain astronomy", "s": "Study of how astronomical objects change with time."}, "https://codexery.com/solar-phenomena/e/solar-phenomena/coronal-mass-ejection/": {"t": "Coronal mass ejection", "s": "A massive ejection of solar plasma into space."}, "https://codexery.com/planets-and-dwarf-planets/e/planets-and-dwarf-planets/jupiter/": {"t": "Jupiter", "s": "Largest planet in the Solar System, a gas giant with a Great Red Spot."}, "https://codexery.com/astronomy-space/e/astronomy-and-space/light-year/": {"t": "Light-year", "s": "A unit of distance, not time, used for astronomical scales."}, "https://codexery.com/astronomical-concepts-and-techniques/e/astronomical-concepts-and-techniques/stellar-parallax/": {"t": "Stellar parallax", "s": "Trigonometric method for measuring distances to nearby stars."}, "https://codexery.com/stars-and-stellar-phenomena/e/stars-and-stellar-phenomena/double-star/": {"t": "Double star", "s": "A double star is a pair of stars that appear close together as viewed from Earth, either as a gravitationally bound binary or a chance optical alignment."}, "https://codexery.com/stars-of-camelopardalis/e/stars-of-camelopardalis/11-camelopardalis/": {"t": "11 Camelopardalis", "s": "A Be variable star in Camelopardalis, forming a double with 12 Camelopardalis."}, "https://codexery.com/orbits-and-celestial-mechanics/e/orbits-and-celestial-mechanics/orbital-period/": {"t": "Orbital period", "s": "Time for one full orbit around a primary body."}, "https://codexery.com/orbits-and-celestial-mechanics/e/orbits-and-celestial-mechanics/orbital-eccentricity/": {"t": "Orbital eccentricity", "s": "Parameter measuring deviation of an orbit from a perfect circle."}, "https://codexery.com/astronomy/e/astronomy/giant-star/": {"t": "Giant star", "s": "Giant stars are luminous, expanded post-main-sequence stars."}, "https://codexery.com/planets-stellar-astronomy/e/planets-and-stellar-astronomy/stellar-classification/": {"t": "Stellar classification", "s": "System for classifying stars by spectral and luminosity characteristics."}, "https://codexery.com/binary-and-multiple-stars/e/binary-and-multiple-stars/rs-canum-venaticorum-variable/": {"t": "RS Canum Venaticorum variable", "s": "Close binary stars with starspots causing brightness variations."}, "https://codexery.com/stellar-phenomena/e/stellar-phenomena/starspot/": {"t": "Starspot", "s": "Large, cool patches on stars, detected via brightness and magnetic methods."}, "https://codexery.com/constellations/e/constellations/pictor/": {"t": "Pictor", "s": "A southern constellation named for the painter's easel.", "i": "https://codexery.com/constellations/img/constellations/pictor.webp", "c": "Albertus Pictor · Public domain"}, "https://codexery.com/variable-stars/e/variable-stars/by-draconis-variable/": {"t": "BY Draconis variable", "s": "Rotating K and M dwarfs with starspot-driven brightness changes."}, "https://codexery.com/planets-stellar-astronomy/e/planets-and-stellar-astronomy/stellar-magnetic-field/": {"t": "Stellar magnetic field", "s": "Magnetic fields generated by plasma motion shape stellar activity."}, "https://codexery.com/brown-dwarfs/e/brown-dwarfs/brown-dwarf/": {"t": "Brown dwarf", "s": "Substellar objects fusing deuterium, bridging planets and stars.", "i": "https://codexery.com/brown-dwarfs/img/brown-dwarfs/brown-dwarf.webp", "c": "NASA/JPL-Caltech · Public domain"}, "https://codexery.com/units-measurement/e/units-and-measurement/kelvin/": {"t": "Kelvin", "s": "British scientist who developed the absolute temperature scale."}, "https://codexery.com/brown-dwarfs/e/brown-dwarfs/l-dwarf/": {"t": "L dwarf", "s": "L dwarfs bridge the gap between stars and brown dwarfs."}, "https://codexery.com/meteorology/e/meteorology/water-vapor/": {"t": "Water vapor", "s": "The gaseous phase of water, a key greenhouse gas and component of Earth's hydrosphere."}, "https://codexery.com/chemical-elements-metals/e/chemical-elements-and-metals/potassium/": {"t": "Potassium", "s": "Soft alkali metal essential to life and widely used in fertilizers."}, "https://codexery.com/variable-stars/e/variable-stars/cataclysmic-variable-star/": {"t": "Cataclysmic variable star", "s": "Binary stars that brighten dramatically via accretion-driven outbursts."}, "https://codexery.com/stellar-phenomena/e/stellar-phenomena/intermediate-polar/": {"t": "Intermediate polar", "s": "Cataclysmic variable with a magnetically truncated accretion disk."}, "https://codexery.com/galaxies-and-their-properties/e/galaxies-and-their-properties/ring-galaxy/": {"t": "Ring galaxy", "s": "A galaxy with a ring-shaped structure of stars and gas."}, "https://codexery.com/constellations/e/constellations/cetus-constellation/": {"t": "Cetus (constellation)", "s": "A water constellation home to the first known variable star."}, "https://codexery.com/galaxy-clusters-and-groups/e/galaxy-clusters-and-groups/galaxy-group/": {"t": "Galaxy group", "s": "The smallest and most common galaxy aggregates in the universe."}, "https://codexery.com/spiral-galaxies/e/spiral-galaxies/spiral-galaxy/": {"t": "Spiral galaxy", "s": "Spiral galaxies feature rotating disks, arms, and often a central bar."}, "https://codexery.com/astronomy/e/astronomy/elliptical-galaxy/": {"t": "Elliptical galaxy", "s": "Elliptical galaxies are smooth, ellipsoidal galaxies with old stars."}, "https://codexery.com/astronomy/e/astronomy/h-ii-region/": {"t": "H II region", "s": "Ionized hydrogen regions where new stars are born."}, "https://codexery.com/stars-and-stellar-phenomena/e/stars-and-stellar-phenomena/flare-star/": {"t": "Flare star", "s": "A variable star that undergoes unpredictable dramatic increases in brightness, powered by magnetic energy."}, "https://codexery.com/stars-of-cancer/e/stars-of-cancer/cancer-constellation/": {"t": "Cancer (constellation)", "s": "The dimmest zodiac constellation, home to the Praesepe star cluster."}, "https://codexery.com/messier-objects-open-clusters/e/messier-objects-open-clusters/beehive-cluster/": {"t": "Beehive Cluster", "s": "An ancient open cluster in Cancer with over 1,000 stars."}, "https://codexery.com/astronomy/e/astronomy/hertzsprung-russell-diagram/": {"t": "Hertzsprung–Russell diagram", "s": "Scatter plot linking stellar luminosity and temperature."}, "https://codexery.com/constellations/e/constellations/canis-minor/": {"t": "Canis Minor", "s": "A small northern constellation representing the lesser dog following Orion."}, "https://codexery.com/space-telescopes/e/space-telescopes/ariel-5/": {"t": "Ariel 5", "s": "Joint UK-US X-ray telescope launched in 1974."}, "https://codexery.com/stars-and-stellar-phenomena/e/stars-and-stellar-phenomena/light-curve/": {"t": "Light curve", "s": "Graph of celestial light intensity over time."}, "https://codexery.com/novels-by-robert-a-heinlein/e/novels-by-robert-a-heinlein/variable-star/": {"t": "Variable Star", "s": "A young musician flees romance aboard a starship colony mission."}, "https://codexery.com/astronomical-radio-sources/e/astronomical-radio-sources/microquasar/": {"t": "Microquasar", "s": "A stellar black hole system with relativistic jets and X-ray emission."}, "https://codexery.com/electromagnetism-and-waves/e/electromagnetism-and-waves/gamma-ray/": {"t": "Gamma ray", "s": "Penetrating electromagnetic radiation from nuclear decay and cosmic events."}, "https://codexery.com/astronomy/e/astronomy/extinction-astronomy/": {"t": "Extinction (astronomy)", "s": "Extinction dims and reddens starlight via interstellar dust and gas."}, "https://codexery.com/black-holes/e/black-holes/astrophysical-jet/": {"t": "Astrophysical jet", "s": "Bipolar streams of ionised matter expelled at high velocity."}, "https://codexery.com/astronomy/e/astronomy/cosmic-ray/": {"t": "Cosmic ray", "s": "High-energy particles from space, discovered via balloon flights in 1912.", "i": "https://codexery.com/astronomy/img/astronomy/cosmic-ray.webp", "c": "Vahram Mekhitarian · CC BY-SA 4.0"}, "https://codexery.com/nebulae/e/nebulae/cygnus-x-star-complex/": {"t": "Cygnus X (star complex)", "s": "A massive star formation region behind the Cygnus Rift."}, "https://codexery.com/nebulae/e/nebulae/bok-globule/": {"t": "Bok globule", "s": "Dark nebulae where stars are born, often forming double or multiple systems.", "i": "https://codexery.com/nebulae/img/nebulae/bok-globule.webp", "c": "ESO · CC BY 4.0"}, "https://codexery.com/constellations/e/constellations/ursa-major/": {"t": "Ursa Major", "s": "The Great Bear of the Northern Sky", "i": "https://codexery.com/constellations/img/constellations/ursa-major.webp", "c": "IAU and Sky & Telescope magazine (Roger Sinnott & Rick Fienberg) · via Wikipedia: Ursa Major · CC BY 3.0"}, "https://codexery.com/binary-and-multiple-stars/e/binary-and-multiple-stars/binary-mass-function/": {"t": "Binary mass function", "s": "A function constraining the mass of an unseen binary component."}, "https://codexery.com/orbits-and-celestial-mechanics/e/orbits-and-celestial-mechanics/orbital-inclination/": {"t": "Orbital inclination", "s": "Angle measuring tilt of an orbit relative to a reference plane."}, "https://codexery.com/constellations/e/constellations/apus/": {"t": "Apus", "s": "A southern constellation named for the footless bird-of-paradise."}, "https://codexery.com/astronomical-catalogues/e/astronomical-catalogues/bayer-designation/": {"t": "Bayer designation", "s": "Systematic stellar naming using Greek and Latin letters.", "i": "https://codexery.com/astronomical-catalogues/img/astronomical-catalogues/bayer-designation.webp", "c": "Easy n · via Wikipedia: Bayer designation · Public domain"}, "https://codexery.com/planets-stellar-astronomy/e/planets-and-stellar-astronomy/stellar-evolution/": {"t": "Stellar evolution", "s": "Stars evolve from gas clouds to white dwarfs, neutron stars, or black holes."}, "https://codexery.com/stellar-evolution/e/stellar-evolution/red-clump/": {"t": "Red clump", "s": "Cool horizontal branch stars fusing helium in their cores."}, "https://codexery.com/stars-and-stellar-phenomena/e/stars-and-stellar-phenomena/horizontal-branch/": {"t": "Horizontal branch", "s": "A stage of stellar evolution powered by core helium fusion, following the red-giant branch."}, "https://codexery.com/constellations/e/constellations/chinese-constellations/": {"t": "Chinese constellations", "s": "An independent system of Chinese asterisms dating from at least the 5th century BC."}, "https://codexery.com/stars-of-apus/e/stars-of-apus/zeta-apodis/": {"t": "Zeta Apodis", "s": "An orange-hued giant star in the southern constellation Apus."}, "https://codexery.com/stars-of-apus/e/stars-of-apus/iota-apodis/": {"t": "Iota Apodis", "s": "A binary B-type system in the southern constellation Apus."}, "https://codexery.com/stars-of-apus/e/stars-of-apus/beta-apodis/": {"t": "Beta Apodis", "s": "A K-type giant star in the southern constellation Apus."}, "https://codexery.com/stars-of-apus/e/stars-of-apus/delta-apodis/": {"t": "Delta Apodis", "s": "A double star in Apus, visible to the naked eye."}, "https://codexery.com/variable-stars/e/variable-stars/eta-apodis/": {"t": "Eta Apodis", "s": "A chemically peculiar Am star with magnetic variability."}, "https://codexery.com/stars-of-apus/e/stars-of-apus/epsilon-apodis/": {"t": "Epsilon Apodis", "s": "A massive B-type variable star in Apus."}, "https://codexery.com/constellations/e/constellations/aquila/": {"t": "Aquila", "s": "The Eagle constellation"}, "https://codexery.com/emission-dark-and-reflection-nebulae/e/emission-dark-and-reflection-nebulae/emission-nebula/": {"t": "Emission nebula", "s": "Ionized gases emit light, often red from hydrogen."}, "https://codexery.com/languages-and-writing-systems/e/languages-and-writing-systems/persian-language/": {"t": "Persian language", "s": "Persian is a Western Iranian language with three standard varieties."}, "https://codexery.com/classical-mechanics/e/classical-mechanics/weighing-scale/": {"t": "Weighing scale", "s": "A device for measuring mass or weight using equilibrium."}, "https://codexery.com/binary-and-multiple-stars/e/binary-and-multiple-stars/altair/": {"t": "Altair", "s": "Altair is a rapidly rotating, oblate A-type star in Aquila."}, "https://codexery.com/named-stars/e/named-stars/beta-aquilae/": {"t": "Beta Aquilae", "s": "Triple star system in Aquila, visible to the naked eye."}, "https://codexery.com/international-organizations-and-agreemen/e/international-organizations-and-agreements/international-astronomical-union/": {"t": "International Astronomical Union", "s": "Global authority for astronomical naming and cooperation."}, "https://codexery.com/languages/e/languages/latin/": {"t": "Latin", "s": "A classical language of the Italic branch, Latin evolved into the Romance languages and remained a key scholarly tongue into the early 19th century."}, "https://codexery.com/chinese-folklore/e/chinese-folklore/the-cowherd-and-the-weaver-girl/": {"t": "The Cowherd and the Weaver Girl", "s": "Lovers separated by the Milky Way, reunited yearly by magpies."}, "https://codexery.com/stars-of-lyra/e/stars-of-lyra/vega/": {"t": "Vega", "s": "Bright northern star, former pole star, surrounded by a dust disk."}, "https://codexery.com/british-science-fiction-television-shows/e/british-science-fiction-television-shows/red-dwarf/": {"t": "Red Dwarf", "s": "A British sci-fi comedy about the last human in space."}, "https://codexery.com/people-associated-with-astronomical/e/people-associated-with-astronomical-catalogues/friedrich-wilhelm-argelander/": {"t": "Friedrich Wilhelm Argelander", "s": "German astronomer who catalogued over 324,000 stars."}, "https://codexery.com/astronomical-catalogues/e/astronomical-catalogues/durchmusterung/": {"t": "Durchmusterung", "s": "Systematic star survey cataloguing 342,198 stars down to magnitude 9.5."}, "https://codexery.com/planets-and-dwarf-planets/e/planets-and-dwarf-planets/venus/": {"t": "Venus", "s": "Earth's twin, hottest planet, shrouded in sulfuric acid clouds."}, "https://codexery.com/lines-hemispheres/e/lines-and-hemispheres/equator/": {"t": "Equator", "s": "Imaginary line dividing Earth into Northern and Southern Hemispheres."}, "https://codexery.com/planets-stellar-astronomy/e/planets-and-stellar-astronomy/stellar-kinematics/": {"t": "Stellar kinematics", "s": "Observational study of star motions through space."}, "https://codexery.com/constellations/e/constellations/grus-constellation/": {"t": "Grus (constellation)", "s": "A southern constellation representing a crane, one of the Southern Birds."}, "https://codexery.com/constellations/e/constellations/gemini/": {"t": "Gemini", "s": "A zodiac constellation representing the twins Castor and Pollux."}, "https://codexery.com/castor-and-pollux/e/castor-and-pollux/pollux-star/": {"t": "Pollux (star)", "s": "Brightest star in Gemini and closest red giant to the Sun."}, "https://codexery.com/optical-telescopes/e/optical-telescopes/small-telescope/": {"t": "Small telescope", "s": "Small telescopes dominate amateur astronomy and key research fields."}, "https://codexery.com/stars-of-ursa-major/e/stars-of-ursa-major/ursa-major-moving-group/": {"t": "Ursa Major moving group", "s": "Closest stellar moving group, rich in Big Dipper stars."}, "https://codexery.com/exoplanets/e/exoplanets/the-transit-method/": {"t": "The transit method", "s": "Detects exoplanets by measuring starlight dimming during transit."}, "https://codexery.com/bright-stars-by-bayer-designation/e/bright-stars-by-bayer-designation/pi-mensae/": {"t": "Pi Mensae", "s": "G-dwarf star with three planets, including a massive brown dwarf."}, "https://codexery.com/periodic-table-elements/e/periodic-table-and-elements/lithium/": {"t": "Lithium", "s": "Lightest metal, key to batteries and mood stabilization."}, "https://codexery.com/transiting-exoplanets/e/transiting-exoplanets/hd-63433-c/": {"t": "HD 63433 c", "s": "A mini-Neptune losing its atmosphere to become a super-Earth."}, "https://codexery.com/planets-and-dwarf-planets/e/planets-and-dwarf-planets/neptune/": {"t": "Neptune", "s": "The only planet discovered through mathematical prediction, not direct observation."}, "https://codexery.com/chemistry-materials/e/chemistry-and-materials/mercury-element/": {"t": "Mercury (element)", "s": "A heavy, silvery liquid metal with unique physical properties and high toxicity."}, "https://codexery.com/planets-stellar-astronomy/e/planets-and-stellar-astronomy/solar-system/": {"t": "Solar System", "s": "The Sun and all objects gravitationally bound to it.", "i": "https://codexery.com/planets-stellar-astronomy/img/planets-and-stellar-astronomy/solar-system.webp", "c": "via Wikipedia: Solar System · see source"}, "https://codexery.com/atmosphere/e/atmosphere/atmosphere/": {"t": "Atmosphere", "s": "A layer of gases enveloping an astronomical object, retained by gravity."}, "https://codexery.com/exoplanets/e/exoplanets/the-james-webb-space-telescope/": {"t": "The James Webb Space Telescope", "s": "The largest space telescope, observing the infrared universe from beyond Earth's orbit."}, "https://codexery.com/classical-and-fluid-mechanics/e/classical-and-fluid-mechanics/precession/": {"t": "Precession", "s": "A change in the orientation of a rotating body's rotational axis."}, "https://codexery.com/electromagnetism-and-radiation/e/electromagnetism-and-radiation/radiative-transfer/": {"t": "Radiative transfer", "s": "Energy transfer via electromagnetic radiation through absorption, emission, scattering."}, "https://codexery.com/black-holes/e/black-holes/stellar-black-hole/": {"t": "Stellar black hole", "s": "Black hole formed by gravitational collapse of a star.", "i": "https://codexery.com/black-holes/img/black-holes/stellar-black-hole.webp", "c": "ESO/L. Calçada/M.Kornmesser · via Wikipedia: Stellar black hole · CC BY 4.0"}, "https://codexery.com/constellations/e/constellations/scorpius/": {"t": "Scorpius", "s": "Zodiac constellation with bright stars and rich mythology.", "i": "https://codexery.com/constellations/img/constellations/scorpius.webp", "c": "Krzysztof Ziarnek, Kenraiz · CC BY-SA 4.0"}, "https://codexery.com/optics-and-color/e/optics-and-color/speed-of-light/": {"t": "Speed of light", "s": "Universal constant defining the maximum speed in spacetime."}, "https://codexery.com/amateur-astronomy/e/amateur-astronomy/bortle-scale/": {"t": "Bortle scale", "s": "A nine-level scale quantifying night-sky brightness and light pollution."}, "https://codexery.com/ancient-greek-astronomy/e/ancient-greek-astronomy/astrolabe/": {"t": "Astrolabe", "s": "Ancient analog device for astronomy, navigation, and timekeeping."}, "https://codexery.com/historical-figures/e/notable/geoffrey-chaucer/": {"t": "Geoffrey Chaucer", "s": "Father of English literature and poet of The Canterbury Tales"}, "https://codexery.com/electromagnetism-and-waves/e/electromagnetism-and-waves/resonance/": {"t": "Resonance", "s": "Resonance amplifies vibrations when frequency matches a system's natural frequency."}, "https://codexery.com/variable-stars/e/variable-stars/stellar-pulsation/": {"t": "Stellar pulsation", "s": "Stellar pulsations arise from expansions and contractions in a star's outer layers."}, "https://codexery.com/variable-stars/e/variable-stars/alpha2-canum-venaticorum-variable/": {"t": "Alpha2 Canum Venaticorum variable", "s": "Magnetic variable stars with chemically peculiar atmospheres."}, "https://codexery.com/solar-phenomena/e/solar-phenomena/magnetic-reconnection/": {"t": "Magnetic reconnection", "s": "Magnetic reconnection converts magnetic energy in plasmas, driving solar flares and aurorae."}, "https://codexery.com/materials-and-states-of-matter/e/materials-and-states-of-matter/degenerate-matter/": {"t": "Degenerate matter", "s": "Matter governed by quantum exclusion at low temperature."}, "https://codexery.com/electromagnetism-and-waves/e/electromagnetism-and-waves/magnetic-field/": {"t": "Magnetic field", "s": "A vector field quantifying magnetic influence at a given location."}, "https://codexery.com/classical-mechanics/e/classical-mechanics/velocity/": {"t": "Velocity", "s": "A vector measure of speed with direction."}, "https://codexery.com/stellar-phenomena/e/stellar-phenomena/stellar-mass-loss/": {"t": "Stellar mass loss", "s": "Stars lose mass via winds, binary interactions, and eruptions."}, "https://codexery.com/meteorology/e/meteorology/hertz/": {"t": "Hertz", "s": "German physicist who proved electromagnetic waves exist."}, "https://codexery.com/planets-stellar-astronomy/e/planets-and-stellar-astronomy/pulsar/": {"t": "Pulsar", "s": "Rotating neutron stars emitting regular electromagnetic pulses."}, "https://codexery.com/neutron-stars/e/neutron-stars/atoll-source/": {"t": "Atoll source", "s": "A low-luminosity LMXB with a weakly magnetized neutron star."}, "https://codexery.com/constellations/e/constellations/pegasus/": {"t": "Pegasus", "s": "Constellation of the winged horse from Greek mythology."}, "https://codexery.com/astronomers-and-cosmologists/e/astronomers-and-cosmologists/charles-messier/": {"t": "Charles Messier", "s": "Charles Messier (1730–1817) was a French astronomer best known for compiling a catalogue of 110 nebulae and star clusters, now called the Messier objects, each ", "i": "https://codexery.com/astronomers-and-cosmologists/img/astronomers-and-cosmologists/charles-messier.webp", "c": "Ansiaux (1729—1786) (??) · via Wikipedia: Charles Messier · Public domain"}, "https://codexery.com/stars-and-stellar-objects/e/stars-and-stellar-objects/comet/": {"t": "Comet", "s": "Icy wanderers that bloom when near the Sun."}, "https://codexery.com/planetary-nebulae/e/planetary-nebulae/planetary-nebula/": {"t": "Planetary nebula", "s": "Expanding shells of ionized gas from dying intermediate-mass stars."}, "https://codexery.com/stars-of-pegasus/e/stars-of-pegasus/epsilon-pegasi/": {"t": "Epsilon Pegasi", "s": "A red supergiant and the nose of the flying horse."}, "/e/astronomical-x-ray-sources/neve-1/": {"t": "NeVe 1", "s": "Host galaxy of the most energetic astronomical event known."}, "https://codexery.com/galaxies-and-their-properties/e/galaxies-and-their-properties/brightest-cluster-galaxy/": {"t": "Brightest cluster galaxy", "s": "The most massive galaxies, found at cluster centers.", "i": "https://codexery.com/galaxies-and-their-properties/img/galaxies-and-their-properties/brightest-cluster-galaxy.webp", "c": "ESO/J. Emerson/VISTA. Acknowledgment: Cambridge Astronomical Survey Unit · CC BY 4.0"}, "https://codexery.com/astronomical-radio-sources/e/astronomical-radio-sources/radio-galaxy/": {"t": "Radio galaxy", "s": "Galaxies with giant radio lobes powered by jets from active nuclei."}, "https://codexery.com/astronomical-radio-sources/e/astronomical-radio-sources/astronomical-radio-source/": {"t": "Astronomical radio source", "s": "Objects in space emitting strong radio waves from extreme processes."}, "https://codexery.com/emission-dark-and-reflection-nebulae/e/emission-dark-and-reflection-nebulae/lacerta-ob1/": {"t": "Lacerta OB1", "s": "A nearby OB association with fading star formation and faint nebular filaments."}, "https://codexery.com/space-telescopes/e/space-telescopes/agile-satellite/": {"t": "AGILE (satellite)", "s": "Italy's gamma-ray eye on the high-energy universe."}, "https://codexery.com/nebulae/e/nebulae/circumstellar-disc/": {"t": "Circumstellar disc", "s": "A circumstellar disc is a rotating ring of gas, dust, and debris around a star, key to planet formation."}, "https://codexery.com/classical-and-continuum-mechanics/e/classical-and-continuum-mechanics/tidal-force/": {"t": "Tidal force", "s": "Differential gravity stretches bodies and drives tides across the cosmos."}, "/e/astronomical-x-ray-sources/ms-0735-6-7421/": {"t": "MS 0735.6+7421", "s": "Galaxy cluster with a massive black hole and powerful eruption."}, "https://codexery.com/galaxies-and-their-properties/e/galaxies-and-their-properties/type-cd-galaxy/": {"t": "Type-cD galaxy", "s": "Supergiant elliptical galaxies at the centres of rich clusters."}, "https://codexery.com/galaxy-clusters-and-groups/e/galaxy-clusters-and-groups/ophiuchus-supercluster/": {"t": "Ophiuchus Supercluster", "s": "A nearby supercluster centered on the Ophiuchus Cluster."}, "https://codexery.com/electromagnetism-and-radiation/e/electromagnetism-and-radiation/visible-spectrum/": {"t": "Visible spectrum", "s": "The range of electromagnetic radiation visible to the human eye."}, "https://codexery.com/nebulae/e/nebulae/rho-ophiuchi-cloud-complex/": {"t": "Rho Ophiuchi cloud complex", "s": "One of the closest star-forming regions to the Solar System."}, "https://codexery.com/astronomy-space/e/astronomy-and-space/messier-87/": {"t": "Messier 87", "s": "A supergiant elliptical galaxy with a relativistic jet and supermassive black hole."}, "https://codexery.com/galaxy-clusters-and-groups/e/galaxy-clusters-and-groups/cooling-flow/": {"t": "Cooling flow", "s": "Predicted rapid cooling of intracluster medium in galaxy clusters."}, "https://codexery.com/black-holes/e/black-holes/supermassive-black-hole/": {"t": "Supermassive black hole", "s": "Supermassive black holes anchor the centers of most large galaxies.", "i": "https://codexery.com/black-holes/img/black-holes/supermassive-black-hole.webp", "c": "Event Horizon Telescope · via Wikipedia: Supermassive black hole · CC BY 4.0"}, "https://codexery.com/galaxy-clusters-and-groups/e/galaxy-clusters-and-groups/perseus-cluster/": {"t": "Perseus Cluster", "s": "One of the most massive objects in the known universe."}, "https://codexery.com/ngc-objects/e/ngc-objects/ngc-1275/": {"t": "NGC 1275", "s": "A Seyfert galaxy merging with the Perseus Cluster."}, "https://codexery.com/radio-telescopes/e/radio-telescopes/murchison-widefield-array/": {"t": "Murchison Widefield Array", "s": "Low-frequency SKA precursor with wide field of view."}, "https://codexery.com/astronomers-and-astrophysicists/e/astronomers-and-astrophysicists/william-herschel/": {"t": "William Herschel", "s": "Discoverer of Uranus and infrared radiation", "i": "https://codexery.com/astronomers-and-astrophysicists/img/astronomers-and-astrophysicists/william-herschel.webp", "c": "Lemuel Francis Abbott · via Wikipedia: William Herschel · Public domain"}, "https://codexery.com/galaxy-clusters-and-groups/e/galaxy-clusters-and-groups/virgo-supercluster/": {"t": "Virgo Supercluster", "s": "A typical poor supercluster containing the Local Group."}, "https://codexery.com/galaxies-and-their-properties/e/galaxies-and-their-properties/bl-lacertae-object/": {"t": "BL Lacertae object", "s": "Active galactic nuclei with rapid variability and featureless spectra.", "i": "https://codexery.com/galaxies-and-their-properties/img/galaxies-and-their-properties/bl-lacertae-object.webp", "c": "The Pan-STARRS1 Surveys (PS1) and the PS1 public science archive have been made  · Public domain"}}