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163 relations: Absorption (electromagnetic radiation), Adaptive optics, Aether (classical element), Annie Jump Cannon, Antonia Maury, Aristotle, Arthur Eddington, Astrochemistry, Astronomical object, Astronomical spectroscopy, Astronomy, Astronomy & Geophysics, Astroparticle physics, Astrophysics, Atmosphere, Atomic, molecular, and optical physics, Big Bang, Binary pulsar, Black hole, Bremsstrahlung, Carl Sagan, Cecilia Payne-Gaposchkin, Celestial spheres, Century, Chandra X-ray Observatory, Charge-coupled device, Chemical element, Chemistry, Compton Gamma Ray Observatory, Computation, Conceptual model, Cosmic microwave background, Cosmic ray, Cosmogony, Czech Academy of Sciences, Dark energy, Dark matter, Density, Edward Charles Pickering, Edward Frankland, Electromagnetic spectrum, Electromagnetism, Emission spectrum, Exoplanet, Fire (classical element), Formation and evolution of the Solar System, Fraunhofer lines, Galaxy, Galaxy formation and evolution, Galileo Galilei, ..., Gamma-ray astronomy, General relativity, George Ellery Hale, Gravitational wave, Gustav Kirchhoff, Harvard College Observatory, Harvard Computers, Helios, Helium, Henry Draper Catalogue, Henry Draper Medal, Hertzsprung–Russell diagram, High Energy Stereoscopic System, High-energy astronomy, Hubert Reeves, Hydrogen, IACT, Illustris project, Inflation (cosmology), Infrared astronomy, Interstellar medium, Isaac Newton, James Edward Keeler, Joseph von Fraunhofer, Kent State University, Lambda-CDM model, Lawrence M. Krauss, List of astronomers, List of astronomical observatories, Luminosity, MAGIC (telescope), Magnetar, Magnetohydrodynamics, Mathematical model, Matter, Mechanics, Metallicity, Microwave, Millennium, Millisecond pulsar, Multiverse, Nebula, Neil deGrasse Tyson, Neutrino, Neutrino astronomy, Norman Lockyer, Nuclear fusion, Nuclear physics, Nucleosynthesis, Numerical analysis, Observable universe, Observational astronomy, Observatory, On Generation and Corruption, Optical spectrometer, Optics, Particle accelerator, Particle physics, Physical cosmology, Physical law, Physical Review, Plato, Polytrope, Pulsar, Quantum mechanics, Quasar, Radcliffe College, Radio astronomy, Radio telescope, Radio wave, Redshift, René Descartes, Robert Bunsen, Rose Center for Earth and Space, Rossi X-ray Timing Explorer, Royal Astronomical Society, Scholarpedia, Science, Science education, Space telescope, Spectroscopy, Springer Science+Business Media, Stanford Encyclopedia of Philosophy, Star, Statistical mechanics, Stellar classification, Stellar dynamics, Stellar evolution, Stephen Hawking, String theory, Subrahmanyan Chandrasekhar, Sun, Telescope, Temperature, The Astrophysical Journal, Theoretical physics, Theory of relativity, Thermodynamics, Time travel, Timeline of black hole physics, Timeline of gravitational physics and relativity, Timeline of knowledge about galaxies, clusters of galaxies, and large-scale structure, Timeline of white dwarfs, neutron stars, and supernovae, Ultimate fate of the universe, Ultraviolet, Visible spectrum, Visible-light astronomy, Wavelength, William Hyde Wollaston, Williamina Fleming, World Scientific, Wormhole, X-ray astronomy. Expand index (113 more) »
Absorption (electromagnetic radiation)
In physics, absorption of electromagnetic radiation is the way in which the energy of a photon is taken up by matter, typically the electrons of an atom.
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Adaptive optics
Adaptive optics (AO) is a technology used to improve the performance of optical systems by reducing the effect of incoming wavefront distortions by deforming a mirror in order to compensate for the distortion.
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Aether (classical element)
According to ancient and medieval science, aether (αἰθήρ aithēr), also spelled æther or ether and also called quintessence, is the material that fills the region of the universe above the terrestrial sphere.
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Annie Jump Cannon
Annie Jump Cannon (December 11, 1863 – April 13, 1941) was an American astronomer whose cataloging work was instrumental in the development of contemporary stellar classification.
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Antonia Maury
Antonia Maury (March 21, 1866 – January 8, 1952) was an American astronomer who published an important early catalog of stellar spectra.
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Aristotle
Aristotle (Ἀριστοτέλης Aristotélēs,; 384–322 BC) was an ancient Greek philosopher and scientist born in the city of Stagira, Chalkidiki, in the north of Classical Greece.
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Arthur Eddington
Sir Arthur Stanley Eddington (28 December 1882 – 22 November 1944) was an English astronomer, physicist, and mathematician of the early 20th century who did his greatest work in astrophysics.
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Astrochemistry
Astrochemistry is the study of the abundance and reactions of molecules in the Universe, and their interaction with radiation.
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Astronomical object
An astronomical object or celestial object is a naturally occurring physical entity, association, or structure that exists in the observable universe.
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Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light and radio, which radiates from stars and other celestial objects.
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Astronomy
Astronomy (from ἀστρονομία) is a natural science that studies celestial objects and phenomena.
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Astronomy & Geophysics
Astronomy & Geophysics (A&G) is a scientific journal and trade magazine published on behalf of the Royal Astronomical Society (RAS) by Oxford University Press.
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Astroparticle physics
Astroparticle physics, also called particle astrophysics, is a branch of particle physics that studies elementary particles of astronomical origin and their relation to astrophysics and cosmology.
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Astrophysics
Astrophysics is the branch of astronomy that employs the principles of physics and chemistry "to ascertain the nature of the astronomical objects, rather than their positions or motions in space".
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Atmosphere
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.
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Atomic, molecular, and optical physics
Atomic, molecular, and optical physics (AMO) is the study of matter-matter and light-matter interactions; at the scale of one or a few atoms and energy scales around several electron volts.
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Big Bang
The Big Bang theory is the prevailing cosmological model for the universe from the earliest known periods through its subsequent large-scale evolution.
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Binary pulsar
A binary pulsar is a pulsar with a binary companion, often a white dwarf or neutron star.
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Black hole
A black hole is a region of spacetime exhibiting such strong gravitational effects that nothing—not even particles and electromagnetic radiation such as light—can escape from inside it.
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Bremsstrahlung
Bremsstrahlung, from bremsen "to brake" and Strahlung "radiation"; i.e., "braking radiation" or "deceleration radiation", is electromagnetic radiation produced by the deceleration of a charged particle when deflected by another charged particle, typically an electron by an atomic nucleus.
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Carl Sagan
Carl Edward Sagan (November 9, 1934 – December 20, 1996) was an American astronomer, cosmologist, astrophysicist, astrobiologist, author, science popularizer, and science communicator in astronomy and other natural sciences.
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Cecilia Payne-Gaposchkin
Cecilia Helena Payne-Gaposchkin (May 10, 1900 – December 7, 1979) was a British–American astronomer and astrophysicist who, in 1925, proposed in her Ph.D. thesis an explanation for the composition of stars in terms of the relative abundances of hydrogen and helium.
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Celestial spheres
The celestial spheres, or celestial orbs, were the fundamental entities of the cosmological models developed by Plato, Eudoxus, Aristotle, Ptolemy, Copernicus, and others.
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Century
A century (from the Latin centum, meaning one hundred; abbreviated c.) is a period of 100 years.
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Chandra X-ray Observatory
The Chandra X-ray Observatory (CXO), previously known as the Advanced X-ray Astrophysics Facility (AXAF), is a Flagship-class space observatory launched on STS-93 by NASA on July 23, 1999.
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Charge-coupled device
A charge-coupled device (CCD) is a device for the movement of electrical charge, usually from within the device to an area where the charge can be manipulated, for example conversion into a digital value.
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Chemical element
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).
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Chemistry
Chemistry is the scientific discipline involved with compounds composed of atoms, i.e. elements, and molecules, i.e. combinations of atoms: their composition, structure, properties, behavior and the changes they undergo during a reaction with other compounds.
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Compton Gamma Ray Observatory
The Compton Gamma Ray Observatory (CGRO) was a space observatory detecting photons with energies from 20 keV to 30 GeV, in Earth orbit from 1991 to 2000.
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Computation
Computation is any type of calculation that includes both arithmetical and non-arithmetical steps and follows a well-defined model, for example an algorithm.
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Conceptual model
A conceptual model is a representation of a system, made of the composition of concepts which are used to help people know, understand, or simulate a subject the model represents.
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Cosmic microwave background
The cosmic microwave background (CMB, CMBR) is electromagnetic radiation as a remnant from an early stage of the universe in Big Bang cosmology.
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Cosmic ray
Cosmic rays are high-energy radiation, mainly originating outside the Solar System and even from distant galaxies.
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Cosmogony
Cosmogony is any model concerning the origin of either the cosmos or universe.
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Czech Academy of Sciences
The Czech Academy of Sciences (abbr. CAS, Akademie věd České republiky, abbr. AV ČR) was established in 1992 by the Czech National Council as the Czech successor of the former Czechoslovak Academy of Sciences and its tradition goes back to the Royal Bohemian Society of Sciences (founded in 1784) and the Emperor Franz Joseph Czech Academy for Sciences, Literature and Arts (founded in 1890).The Academy is the leading non-university public research institution in the Czech Republic.
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Dark energy
In physical cosmology and astronomy, dark energy is an unknown form of energy which is hypothesized to permeate all of space, tending to accelerate the expansion of the universe.
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Dark matter
Dark matter is a theorized form of matter that is thought to account for approximately 80% of the matter in the universe, and about a quarter of its total energy density.
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Density
The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume.
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Edward Charles Pickering
Prof Edward Charles Pickering FRS(For) HFRSE (July 19, 1846 – February 3, 1919) was an American astronomer and physicist and the older brother to William Henry Pickering.
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Edward Frankland
Sir Edward Frankland, (18 January 1825 – 9 August 1899) was a British chemist.
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Electromagnetic spectrum
The electromagnetic spectrum is the range of frequencies (the spectrum) of electromagnetic radiation and their respective wavelengths and photon energies.
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Electromagnetism
Electromagnetism is a branch of physics involving the study of the electromagnetic force, a type of physical interaction that occurs between electrically charged particles.
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Emission spectrum
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.
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Exoplanet
An exoplanet or extrasolar planet is a planet outside our solar system.
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Fire (classical element)
Fire has been an important part of all cultures and religions from pre-history to modern day and was vital to the development of civilization.
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Formation and evolution of the Solar System
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.
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Fraunhofer lines
In physics and optics, the Fraunhofer lines are a set of spectral lines named after the German physicist Joseph von Fraunhofer (1787–1826).
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Galaxy
A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter.
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Galaxy formation and evolution
The study of galaxy formation and evolution is concerned with the processes that formed a heterogeneous universe from a homogeneous beginning, the formation of the first galaxies, the way galaxies change over time, and the processes that have generated the variety of structures observed in nearby galaxies.
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Galileo Galilei
Galileo Galilei (15 February 1564Drake (1978, p. 1). The date of Galileo's birth is given according to the Julian calendar, which was then in force throughout Christendom. In 1582 it was replaced in Italy and several other Catholic countries with the Gregorian calendar. Unless otherwise indicated, dates in this article are given according to the Gregorian calendar. – 8 January 1642) was an Italian polymath.
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Gamma-ray astronomy
Gamma-ray astronomy is the astronomical observation of gamma rays,Astronomical literature generally hyphenates "gamma-ray" when used as an adjective, but uses "gamma ray" without a hyphen for the noun.
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General relativity
General relativity (GR, also known as the general theory of relativity or GTR) is the geometric theory of gravitation published by Albert Einstein in 1915 and the current description of gravitation in modern physics.
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George Ellery Hale
George Ellery Hale (June 29, 1868 – February 21, 1938) was an American solar astronomer, best known for his discovery of magnetic fields in sunspots, and as the leader or key figure in the planning or construction of several world-leading telescopes; namely, the 40-inch refracting telescope at Yerkes Observatory, 60-inch Hale reflecting telescope at Mount Wilson Observatory, 100-inch Hooker reflecting telescope at Mount Wilson, and the 200-inch Hale reflecting telescope at Palomar Observatory.
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Gravitational wave
Gravitational waves are the disturbance in the fabric ("curvature") of spacetime generated by accelerated masses and propagate as waves outward from their source at the speed of light.
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Gustav Kirchhoff
Gustav Robert Kirchhoff (12 March 1824 – 17 October 1887) was a German physicist who contributed to the fundamental understanding of electrical circuits, spectroscopy, and the emission of black-body radiation by heated objects.
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Harvard College Observatory
The Harvard College Observatory (HCO) is an institution managing a complex of buildings and multiple instruments used for astronomical research by the Harvard University Department of Astronomy.
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Harvard Computers
The Harvard Observatory, under the direction of Edward Charles Pickering (1877 to 1919) had a number of women working as skilled workers to process astronomical data.
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Helios
Helios (Ἥλιος Hēlios; Latinized as Helius; Ἠέλιος in Homeric Greek) is the god and personification of the Sun in Greek mythology.
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Helium
Helium (from lit) is a chemical element with symbol He and atomic number 2.
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Henry Draper Catalogue
The Henry Draper Catalogue (HD) is an astronomical star catalogue published between 1918 and 1924, giving spectroscopic classifications for 225,300 stars; it was later expanded by the Henry Draper Extension (HDE), published between 1925 and 1936, which gave classifications for 46,850 more stars, and by the Henry Draper Extension Charts (HDEC), published from 1937 to 1949 in the form of charts, which gave classifications for 86,933 more stars.
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Henry Draper Medal
The Henry Draper Medal is awarded every 4 years by the United States National Academy of Sciences "for investigations in astronomical physics".
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Hertzsprung–Russell diagram
The Hertzsprung–Russell diagram, abbreviated H–R diagram, HR diagram or HRD, is a scatter plot of stars showing the relationship between the stars' absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.
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High Energy Stereoscopic System
High Energy Stereoscopic System (H.E.S.S.) is a system of Imaging Atmospheric Cherenkov Telescopes (IACT) for the investigation of cosmic gamma rays in the photon energy range of 0.03 to 100 TeV.
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High-energy astronomy
High energy astronomy is the study of astronomical objects that release electromagnetic radiation of highly energetic wavelengths.
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Hubert Reeves
Hubert Reeves (born July 13, 1932), is a French Canadian astrophysicist and popularizer of science.
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Hydrogen
Hydrogen is a chemical element with symbol H and atomic number 1.
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IACT
IACT stands for Imaging Atmospheric (or Air) Cherenkov Telescope or Technique.
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Illustris project
The Illustris project is an ongoing series of astrophysical simulations run by an international collaboration of scientists.
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Inflation (cosmology)
In physical cosmology, cosmic inflation, cosmological inflation, or just inflation, is a theory of exponential expansion of space in the early universe.
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Infrared astronomy
Infrared astronomy is the branch of astronomy and astrophysics that studies astronomical objects visible in infrared (IR) radiation.
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Interstellar medium
In astronomy, the interstellar medium (ISM) is the matter and radiation that exists in the space between the star systems in a galaxy.
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Isaac Newton
Sir Isaac Newton (25 December 1642 – 20 March 1726/27) was an English mathematician, astronomer, theologian, author and physicist (described in his own day as a "natural philosopher") who is widely recognised as one of the most influential scientists of all time, and a key figure in the scientific revolution.
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James Edward Keeler
James Edward Keeler (September 10, 1857 – August 12, 1900) was an American astronomer.
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Joseph von Fraunhofer
Joseph Ritter von Fraunhofer (6 March 1787 – 7 June 1826) was a Bavarian physicist and optical lens manufacturer.
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Kent State University
Kent State University (KSU) is a large, primarily residential, public research university in Kent, Ohio, United States.
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Lambda-CDM model
The ΛCDM (Lambda cold dark matter) or Lambda-CDM model is a parametrization of the Big Bang cosmological model in which the universe contains a cosmological constant, denoted by Lambda (Greek Λ), associated with dark energy, and cold dark matter (abbreviated CDM).
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Lawrence M. Krauss
Lawrence Maxwell Krauss (born May 27, 1954) is an American-Canadian theoretical physicist and cosmologist who is Foundation Professor of the School of Earth and Space Exploration at Arizona State University, and director of its Origins Project.
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List of astronomers
The following are list of astronomers, astrophysicists and other notable people who have made contributions to the field of astronomy.
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List of astronomical observatories
This is a list of astronomical observatories ordered by name, along with initial dates of operation (where an accurate date is available) and location.
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Luminosity
In astronomy, luminosity is the total amount of energy emitted per unit of time by a star, galaxy, or other astronomical object.
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MAGIC (telescope)
MAGIC (Major Atmospheric Gamma Imaging Cherenkov Telescopes) is a system of two Imaging Atmospheric Cherenkov telescopes situated at the Roque de los Muchachos Observatory on La Palma, one of the Canary Islands, at about 2200 m above sea level.
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Magnetar
A magnetar is a type of neutron star with an extremely powerful inferred magnetic field (\sim 10^ - 10^ G).
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Magnetohydrodynamics
Magnetohydrodynamics (MHD; also magneto-fluid dynamics or hydro­magnetics) is the study of the magnetic properties of electrically conducting fluids.
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Mathematical model
A mathematical model is a description of a system using mathematical concepts and language.
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Matter
In the classical physics observed in everyday life, matter is any substance that has mass and takes up space by having volume.
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Mechanics
Mechanics (Greek μηχανική) is that area of science concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effects of the bodies on their environment.
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Metallicity
In astronomy, metallicity is used to describe the abundance of elements present in an object that are heavier than hydrogen or helium.
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Microwave
Microwaves are a form of electromagnetic radiation with wavelengths ranging from one meter to one millimeter; with frequencies between and.
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Millennium
A millennium (plural millennia or, rarely, millenniums) is a period equal to 1000 years, also called kiloyears.
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Millisecond pulsar
A millisecond pulsar (MSP) is a pulsar with a rotational period in the range of about 1–10 milliseconds.
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Multiverse
The multiverse (or meta-universe) is a hypothetical group of multiple separate universes including the universe in which humans live.
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Nebula
A nebula (Latin for "cloud" or "fog"; pl. nebulae, nebulæ, or nebulas) is an interstellar cloud of dust, hydrogen, helium and other ionized gases.
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Neil deGrasse Tyson
Neil deGrasse Tyson (born October 5, 1958) is an American astrophysicist, author, and science communicator.
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Neutrino
A neutrino (denoted by the Greek letter ν) is a fermion (an elementary particle with half-integer spin) that interacts only via the weak subatomic force and gravity.
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Neutrino astronomy
Neutrino astronomy is the branch of astronomy that observes astronomical objects with neutrino detectors in special observatories.
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Norman Lockyer
Sir Joseph Norman Lockyer, KCB FRS (17 May 1836 – 16 August 1920), known simply as Norman Lockyer, was an English scientist and astronomer.
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Nuclear fusion
In nuclear physics, nuclear fusion is a reaction in which two or more atomic nuclei come close enough to form one or more different atomic nuclei and subatomic particles (neutrons or protons).
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Nuclear physics
Nuclear physics is the field of physics that studies atomic nuclei and their constituents and interactions.
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Nucleosynthesis
Nucleosynthesis is the process that creates new atomic nuclei from pre-existing nucleons, primarily protons and neutrons.
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Numerical analysis
Numerical analysis is the study of algorithms that use numerical approximation (as opposed to general symbolic manipulations) for the problems of mathematical analysis (as distinguished from discrete mathematics).
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Observable universe
The observable universe is a spherical region of the Universe comprising all matter that can be observed from Earth at the present time, because electromagnetic radiation from these objects has had time to reach Earth since the beginning of the cosmological expansion.
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Observational astronomy
Observational astronomy is a division of astronomy that is concerned with recording data about the observable universe, in contrast with theoretical astronomy, which is mainly concerned with calculating the measurable implications of physical models.
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Observatory
An observatory is a location used for observing terrestrial or celestial events.
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On Generation and Corruption
On Generation and Corruption (Περὶ γενέσεως καὶ φθορᾶς; De Generatione et Corruptione), also known as On Coming to Be and Passing Away) is a treatise by Aristotle. Like many of his texts, it is both scientific, part of Aristotle's biology, and philosophic. The philosophy is essentially empirical; as in all of Aristotle's works, the deductions made about the unexperienced and unobservable are based on observations and real experiences. The question raised at the beginning of the text builds on an idea from Aristotle's earlier work The Physics. Namely, whether things come into being through causes, through some prime material, or whether everything is generated purely through "alteration." Alteration concerned itself with the ability for elements to change based on common and uncommon qualities. From this important work Aristotle gives us two of his most remembered contributions. First, the Four Causes and also the Four Elements (earth, wind, fire and water). He uses these four elements to provide an explanation for the theories of other Greeks concerning atoms, an idea Aristotle considered absurd.
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Optical spectrometer
An optical spectrometer (spectrophotometer, spectrograph or spectroscope) is an instrument used to measure properties of light over a specific portion of the electromagnetic spectrum, typically used in spectroscopic analysis to identify materials.
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Optics
Optics is the branch of physics which involves the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it.
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Particle accelerator
A particle accelerator is a machine that uses electromagnetic fields to propel charged particles to nearly light speed and to contain them in well-defined beams.
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Particle physics
Particle physics (also high energy physics) is the branch of physics that studies the nature of the particles that constitute matter and radiation.
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Physical cosmology
Physical cosmology is the study of the largest-scale structures and dynamics of the Universe and is concerned with fundamental questions about its origin, structure, evolution, and ultimate fate.
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Physical law
A physical law or scientific law is a theoretical statement "inferred from particular facts, applicable to a defined group or class of phenomena, and expressible by the statement that a particular phenomenon always occurs if certain conditions be present." Physical laws are typically conclusions based on repeated scientific experiments and observations over many years and which have become accepted universally within the scientific community.
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Physical Review
Physical Review is an American peer-reviewed scientific journal established in 1893 by Edward Nichols.
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Plato
Plato (Πλάτων Plátōn, in Classical Attic; 428/427 or 424/423 – 348/347 BC) was a philosopher in Classical Greece and the founder of the Academy in Athens, the first institution of higher learning in the Western world.
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Polytrope
In astrophysics, a polytrope refers to a solution of the Lane–Emden equation in which the pressure depends upon the density in the form where is pressure, is density and is a constant of proportionality.
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Pulsar
A pulsar (from pulse and -ar as in quasar) is a highly magnetized rotating neutron star or white dwarf that emits a beam of electromagnetic radiation.
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Quantum mechanics
Quantum mechanics (QM; also known as quantum physics, quantum theory, the wave mechanical model, or matrix mechanics), including quantum field theory, is a fundamental theory in physics which describes nature at the smallest scales of energy levels of atoms and subatomic particles.
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Quasar
A quasar (also known as a QSO or quasi-stellar object) is an extremely luminous active galactic nucleus (AGN).
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Radcliffe College
Radcliffe College was a women's liberal arts college in Cambridge, Massachusetts, and functioned as a female coordinate institution for the all-male Harvard College.
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Radio astronomy
Radio astronomy is a subfield of astronomy that studies celestial objects at radio frequencies.
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Radio telescope
A radio telescope is a specialized antenna and radio receiver used to receive radio waves from astronomical radio sources in the sky in radio astronomy.
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Radio wave
Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light.
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Redshift
In physics, redshift happens when light or other electromagnetic radiation from an object is increased in wavelength, or shifted to the red end of the spectrum.
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René Descartes
René Descartes (Latinized: Renatus Cartesius; adjectival form: "Cartesian"; 31 March 1596 – 11 February 1650) was a French philosopher, mathematician, and scientist.
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Robert Bunsen
Robert Wilhelm Eberhard Bunsen (30 March 1811N1 – 16 August 1899) was a German chemist.
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Rose Center for Earth and Space
The Rose Center for Earth and Space is a part of the American Museum of Natural History in New York City.
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Rossi X-ray Timing Explorer
The Rossi X-ray Timing Explorer (RXTE) was a satellite that observed the time variation of astronomical X-ray sources, named after physicist Bruno Rossi.
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Royal Astronomical Society
The Royal Astronomical Society (RAS) is a learned society that began as the Astronomical Society of London in 1820 to support astronomical research (mainly carried on at the time by 'gentleman astronomers' rather than professionals).
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Scholarpedia
Scholarpedia is an English-language online wiki-based encyclopedia with features commonly associated with open-access online academic journals, which aims to have quality content.
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Science
R. P. Feynman, The Feynman Lectures on Physics, Vol.1, Chaps.1,2,&3.
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Science education
Science education is the field concerned with sharing science content and process with individuals not traditionally considered part of the scientific community.
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Space telescope
A space telescope or space observatory is an instrument located in outer space to observe distant planets, galaxies and other astronomical objects.
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Spectroscopy
Spectroscopy is the study of the interaction between matter and electromagnetic radiation.
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Springer Science+Business Media
Springer Science+Business Media or Springer, part of Springer Nature since 2015, is a global publishing company that publishes books, e-books and peer-reviewed journals in science, humanities, technical and medical (STM) publishing.
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Stanford Encyclopedia of Philosophy
The Stanford Encyclopedia of Philosophy (SEP) combines an online encyclopedia of philosophy with peer-reviewed publication of original papers in philosophy, freely accessible to Internet users.
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Star
A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.
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Statistical mechanics
Statistical mechanics is one of the pillars of modern physics.
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Stellar classification
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
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Stellar dynamics
Stellar dynamics is the branch of astrophysics which describes in a statistical way the collective motions of stars subject to their mutual gravity.
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Stellar evolution
Stellar evolution is the process by which a star changes over the course of time.
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Stephen Hawking
Stephen William Hawking (8 January 1942 – 14 March 2018) was an English theoretical physicist, cosmologist, and author, who was director of research at the Centre for Theoretical Cosmology at the University of Cambridge at the time of his death.
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String theory
In physics, string theory is a theoretical framework in which the point-like particles of particle physics are replaced by one-dimensional objects called strings.
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Subrahmanyan Chandrasekhar
Subrahmanyan Chandrasekhar FRS (19 October 1910 – 21 August 1995) was an Indian American astrophysicist who spent his professional life in the United States.
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Sun
The Sun is the star at the center of the Solar System.
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Telescope
A telescope is an optical instrument that aids in the observation of remote objects by collecting electromagnetic radiation (such as visible light).
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Temperature
Temperature is a physical quantity expressing hot and cold.
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The Astrophysical Journal
The Astrophysical Journal, often abbreviated ApJ (pronounced "ap jay") in references and speech, is a peer-reviewed scientific journal of astrophysics and astronomy, established in 1895 by American astronomers George Ellery Hale and James Edward Keeler.
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Theoretical physics
Theoretical physics is a branch of physics that employs mathematical models and abstractions of physical objects and systems to rationalize, explain and predict natural phenomena.
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Theory of relativity
The theory of relativity usually encompasses two interrelated theories by Albert Einstein: special relativity and general relativity.
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Thermodynamics
Thermodynamics is the branch of physics concerned with heat and temperature and their relation to energy and work.
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Time travel
Time travel is the concept of movement between certain points in time, analogous to movement between different points in space by an object or a person, typically using a hypothetical device known as a time machine.
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Timeline of black hole physics
Timeline of black hole physics.
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Timeline of gravitational physics and relativity
Timeline of gravitational physics and general relativity.
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Timeline of knowledge about galaxies, clusters of galaxies, and large-scale structure
Timeline of galaxies, clusters of galaxies, and large-scale structure of the universe.
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Timeline of white dwarfs, neutron stars, and supernovae
Timeline of neutron stars, pulsars, supernovae, and white dwarfs Note that this list is mainly about the development of knowledge, but also about some supernovae taking place.
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Ultimate fate of the universe
The ultimate fate of the universe is a topic in physical cosmology, whose theoretical restrictions allow possible scenarios for the evolution and ultimate fate of the universe to be described and evaluated.
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Ultraviolet
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.
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Visible spectrum
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye.
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Visible-light astronomy
Visible-light astronomy encompasses a wide variety of observations via telescopes that are sensitive in the range of visible light (optical telescopes).
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Wavelength
In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.
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William Hyde Wollaston
William Hyde Wollaston (6 August 1766 – 22 December 1828) was an English chemist and physicist who is famous for discovering the chemical elements palladium and rhodium.
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Williamina Fleming
Williamina Paton Stevens Fleming (May 15, 1857 – May 21, 1911) was a Scottish-American astronomer.
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World Scientific
World Scientific Publishing is an academic publisher of scientific, technical, and medical books and journals headquartered in Singapore.
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Wormhole
A wormhole is a concept that represents a solution of the Einstein field equations: a non-trivial resolution of the Ehrenfest paradox structure linking separate points in spacetime.
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X-ray astronomy
X-ray astronomy is an observational branch of astronomy which deals with the study of X-ray observation and detection from astronomical objects.
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Astro physics, Astro-physics, Astrophysical, Astrophysical sciences, Astrophysicien, Astrophysicist, History of astrophysics, Stellar Physics, Stellar astrophysics, Stellar physics, Stellar theory, Theoretical astrophysicist, Theoretical astrophysics.
References
[1] https://en.wikipedia.org/wiki/Astrophysics
