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Radio astronomy

Index Radio astronomy

Radio astronomy is a subfield of astronomy that studies celestial objects at radio frequencies. [1]

121 relations: Active galactic nucleus, Analog signal, Angular resolution, Annals of the New York Academy of Sciences, Antenna (radio), Antony Hewish, Aperture synthesis, Astronomical interferometer, Astronomical object, Astronomy, Astrophysical maser, Atacama Large Millimeter Array, Atomic clock, Bell Labs, Big Bang, Black body, Black hole, British Army, Cambridge Interferometer, Cavendish Astrophysics Group, Channel 37, Coaxial cable, Constellation, Cosmic microwave background, David Forbes Martyn, Denmark, Department of Scientific and Industrial Research (New Zealand), Directional antenna, Earth, Edward Victor Appleton, Electricity, Electromagnetic interference, Electromagnetic radiation, Electron, Elizabeth Alexander (scientist), European VLBI Network, Flux, Fourier transform, Galactic Center, Galaxy, Galaxy cluster, Gamma-ray astronomy, George Clark Southworth, Goddard Space Flight Center, Grote Reber, Infrared astronomy, Interferometry, Ionosphere, J. A. Ratcliffe, James Clerk Maxwell, ..., James Stanley Hey, Jansky, Johannes Wilsing, Joseph Lade Pawsey, Julius Scheiner, Jupiter, Karl Guthe Jansky, Magnetism, Martin Ryle, Maxwell's equations, Milky Way, Millimetre, Minute and second of arc, Mosaic, Mullard Radio Astronomy Observatory, NASA, National Radio Astronomy Observatory, Norfolk Island, Objective (optics), Oliver Lodge, Optical fiber, Optical telescope, Pergamon Press, Phase (waves), Plasma oscillation, Pulsar, Quasar, Radar, Radar astronomy, Radio frequency, Radio galaxy, Radio Galaxy Zoo, Radio telescope, Roger Clifton Jennison, Ruby Payne-Scott, Sagittarius (constellation), Sagittarius A, Sagittarius A*, Second Cambridge Catalogue of Radio Sources, Serendipity, Shortwave radio, Sidereal time, Signal-to-noise ratio, Solar System, Springer Science+Business Media, Star, Sun, Sunspot, Supermassive black hole, Supernova remnant, Sydney, Synchrotron radiation, Telecommunications Research Establishment, Third Cambridge Catalogue of Radio Sources, Titan (computer), Transmission line, University of Cambridge, Vapor, Very high frequency, Very Large Array, Very Long Baseline Array, Very-long-baseline interferometry, Water, Wave, Wave interference, Waveguide, Wavelength, Waves (Juno), Wiley-VCH, World War II, X-ray astronomy. Expand index (71 more) »

Active galactic nucleus

An active galactic nucleus (AGN) is a compact region at the center of a galaxy that has a much higher than normal luminosity over at least some portion—and possibly all—of the electromagnetic spectrum, with characteristics indicating that the excess luminosity is not produced by stars.

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Analog signal

An analog signal is any continuous signal for which the time varying feature (variable) of the signal is a representation of some other time varying quantity, i.e., analogous to another time varying signal.

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Angular resolution

Angular resolution or spatial resolution describes the ability of any image-forming device such as an optical or radio telescope, a microscope, a camera, or an eye, to distinguish small details of an object, thereby making it a major determinant of image resolution.

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Annals of the New York Academy of Sciences

The Annals of the New York Academy of Sciences is an academic journal published by Wiley-Blackwell on behalf of the New York Academy of Sciences.

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Antenna (radio)

In radio, an antenna is the interface between radio waves propagating through space and electric currents moving in metal conductors, used with a transmitter or receiver.

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Antony Hewish

Antony Hewish (born 11 May 1924) is a British radio astronomer who won the Nobel Prize for Physics in 1974 (together with fellow radio-astronomer Martin Ryle) for his role in the discovery of pulsars.

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Aperture synthesis

Aperture synthesis or synthesis imaging is a type of interferometry that mixes signals from a collection of telescopes to produce images having the same angular resolution as an instrument the size of the entire collection.

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Astronomical interferometer

An astronomical interferometer is an array of separate telescopes, mirror segments, or radio telescope antennas that work together as a single telescope to provide higher resolution images of astronomical objects such as stars, nebulas and galaxies by means of interferometry.

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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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Astronomy

Astronomy (from ἀστρονομία) is a natural science that studies celestial objects and phenomena.

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Astrophysical maser

An astrophysical maser is a naturally occurring source of stimulated spectral line emission, typically in the microwave portion of the electromagnetic spectrum.

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Atacama Large Millimeter Array

The Atacama Large Millimeter/submillimeter Array (ALMA) is an astronomical interferometer of radio telescopes in the Atacama Desert of northern Chile.

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Atomic clock

An atomic clock is a clock device that uses an electron transition frequency in the microwave, optical, or ultraviolet region of the electromagnetic spectrum of atoms as a frequency standard for its timekeeping element.

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Bell Labs

Nokia Bell Labs (formerly named AT&T Bell Laboratories, Bell Telephone Laboratories and Bell Labs) is an American research and scientific development company, owned by Finnish company Nokia.

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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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Black body

A black body is an idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence.

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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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British Army

The British Army is the principal land warfare force of the United Kingdom, a part of British Armed Forces.

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Cambridge Interferometer

The Cambridge Interferometer was a radio telescope interferometer built by Martin Ryle and Antony Hewish in the early 1950s to the west of Cambridge (between the Grange Road football ground and the current Cavendish Laboratory).

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Cavendish Astrophysics Group

The Cavendish Astrophysics Group (formerly the Radio Astronomy Group) is based at the Cavendish Laboratory at the University of Cambridge.

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Channel 37

Channel 37 is a purposefully unused UHF television broadcasting television channel in the United States, Canada and Mexico.

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Coaxial cable

Cross-sectional view of a coaxial cable Coaxial cable, or coax (pronounced), is a type of electrical cable that has an inner conductor surrounded by a tubular insulating layer, surrounded by a tubular conducting shield.

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Constellation

A constellation is a group of stars that are considered to form imaginary outlines or meaningful patterns on the celestial sphere, typically representing animals, mythological people or gods, mythological creatures, or manufactured devices.

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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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David Forbes Martyn

David Forbes Martyn FAA FRS (27 June 1906 – 5 March 1970) was a Scottish-born Australian physicist and radiographer.

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Denmark

Denmark (Danmark), officially the Kingdom of Denmark,Kongeriget Danmark,.

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Department of Scientific and Industrial Research (New Zealand)

The Department of Scientific and Industrial Research (DSIR) is a now-defunct government science agency in New Zealand, founded in 1926 and broken into Crown Research Institutes in 1992.

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Directional antenna

A directional antenna or beam antenna is an antenna which radiates or receives greater power in specific directions allowing increased performance and reduced interference from unwanted sources.

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Earth

Earth is the third planet from the Sun and the only astronomical object known to harbor life.

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Edward Victor Appleton

Sir Edward Victor Appleton (6 September 1892 – 21 April 1965) was an English physicist, Nobel Prize winner (1947) and pioneer in radiophysics.

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Electricity

Electricity is the set of physical phenomena associated with the presence and motion of electric charge.

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Electromagnetic interference

Electromagnetic interference (EMI), also called radio-frequency interference (RFI) when in the radio frequency spectrum, is a disturbance generated by an external source that affects an electrical circuit by electromagnetic induction, electrostatic coupling, or conduction.

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Electromagnetic radiation

In physics, electromagnetic radiation (EM radiation or EMR) refers to the waves (or their quanta, photons) of the electromagnetic field, propagating (radiating) through space-time, carrying electromagnetic radiant energy.

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Electron

The electron is a subatomic particle, symbol or, whose electric charge is negative one elementary charge.

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Elizabeth Alexander (scientist)

Frances Elizabeth Somerville Alexander (née Caldwell; 13 December 1908 – 15 October 1958) was a British geologist, academic, and physicist, whose wartime work with radar and radio led to early developments in radio astronomy and whose post-war work on the geology of Singapore is considered a significant foundation to contemporary research.

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European VLBI Network

The European very-long-baseline interferometry (VLBI) Network was formed in 1980 by a consortium of five of the major radio astronomy institutes in Europe (the European Consortium for VLBI).

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Flux

Flux describes the quantity which passes through a surface or substance.

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Fourier transform

The Fourier transform (FT) decomposes a function of time (a signal) into the frequencies that make it up, in a way similar to how a musical chord can be expressed as the frequencies (or pitches) of its constituent notes.

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Galactic Center

The Galactic Center is the rotational center of the Milky Way.

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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 cluster

A galaxy cluster, or cluster of galaxies, is a structure that consists of anywhere from hundreds to thousands of galaxies that are bound together by gravity with typical masses ranging from 1014–1015 solar masses.

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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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George Clark Southworth

George Clark Southworth (August 24, 1890 – July 6, 1972), who published as G. C. Southworth, was a prominent American radio engineer best known for his role in the development of waveguides in the early 1930s.

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Goddard Space Flight Center

The Goddard Space Flight Center (GSFC) is a major NASA space research laboratory located approximately northeast of Washington, D.C. in Greenbelt, Maryland, United States.

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Grote Reber

Grote Reber (December 22, 1911 – December 20, 2002) was a pioneer of radio astronomy, which combined his interests in amateur radio and amateur astronomy.

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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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Interferometry

Interferometry is a family of techniques in which waves, usually electromagnetic waves, are superimposed causing the phenomenon of interference in order to extract information.

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Ionosphere

The ionosphere is the ionized part of Earth's upper atmosphere, from about to altitude, a region that includes the thermosphere and parts of the mesosphere and exosphere.

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J. A. Ratcliffe

John Ashworth Ratcliffe CB OBE FRS (12 December 1902 – 25 October 1987), "JAR" or "Jack", was an influential British radio physicist.

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James Clerk Maxwell

James Clerk Maxwell (13 June 1831 – 5 November 1879) was a Scottish scientist in the field of mathematical physics.

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James Stanley Hey

James Stanley Hey FRS (3 May 1909 – 27 February 2000) was an English physicist and radio astronomer.

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Jansky

The jansky (symbol Jy) is a non-SI unit of spectral flux density, or spectral irradiance, used especially in radio astronomy.

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Johannes Wilsing

Johannes Wilsing (September 8, 1856 – December 23, 1943) was a German astronomer.

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Joseph Lade Pawsey

Joseph Lade Pawsey (14 May 1908 – 30 November 1962) was an Australian scientist, radiophysicist and radio astronomer.

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Julius Scheiner

Julius Scheiner (25 November 1858 – 20 December 1913) was a German astronomer, born in Cologne and educated at Bonn.

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Jupiter

Jupiter is the fifth planet from the Sun and the largest in the Solar System.

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Karl Guthe Jansky

Karl Guthe Jansky (October 22, 1905 – February 14, 1950) was an American physicist and radio engineer who in August 1931 first discovered radio waves emanating from the Milky Way.

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Magnetism

Magnetism is a class of physical phenomena that are mediated by magnetic fields.

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Martin Ryle

Sir Martin Ryle (27 September 1918 – 14 October 1984) was an English radio astronomer who developed revolutionary radio telescope systems (see e.g. aperture synthesis) and used them for accurate location and imaging of weak radio sources.

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Maxwell's equations

Maxwell's equations are a set of partial differential equations that, together with the Lorentz force law, form the foundation of classical electromagnetism, classical optics, and electric circuits.

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Milky Way

The Milky Way is the galaxy that contains our Solar System.

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Millimetre

The millimetre (International spelling as used by the International Bureau of Weights and Measures; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the metric system, equal to one thousandth of a metre, which is the SI base unit of length.

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Minute and second of arc

A minute of arc, arcminute (arcmin), arc minute, or minute arc is a unit of angular measurement equal to of one degree.

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Mosaic

A mosaic is a piece of art or image made from the assemblage of small pieces of colored glass, stone, or other materials.

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Mullard Radio Astronomy Observatory

Mullard Radio Astronomy Observatory (MRAO), near Cambridge, is home to a number of large aperture synthesis radio telescopes, including the One-Mile Telescope, 5-km Ryle Telescope, and the Arcminute Microkelvin Imager.

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NASA

The National Aeronautics and Space Administration (NASA) is an independent agency of the executive branch of the United States federal government responsible for the civilian space program, as well as aeronautics and aerospace research.

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National Radio Astronomy Observatory

The National Radio Astronomy Observatory (NRAO) is a Federally Funded Research and Development Center of the United States National Science Foundation operated under cooperative agreement by Associated Universities, Inc for the purpose of radio astronomy.

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Norfolk Island

Norfolk Island (Norfuk: Norf'k Ailen) is a small island in the Pacific Ocean located between Australia, New Zealand, and New Caledonia, directly east of mainland Australia's Evans Head, and about from Lord Howe Island.

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Objective (optics)

In optical engineering, the objective is the optical element that gathers light from the object being observed and focuses the light rays to produce a real image.

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Oliver Lodge

Sir Oliver Joseph Lodge, (12 June 1851 – 22 August 1940) was a British physicist and writer involved in the development of, and holder of key patents for, radio.

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Optical fiber

An optical fiber or optical fibre is a flexible, transparent fiber made by drawing glass (silica) or plastic to a diameter slightly thicker than that of a human hair.

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Optical telescope

An optical telescope is a telescope that gathers and focuses light, mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct view, or to make a photograph, or to collect data through electronic image sensors.

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Pergamon Press

Pergamon Press was an Oxford-based publishing house, founded by Paul Rosbaud and Robert Maxwell, which published scientific and medical books and journals.

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Phase (waves)

Phase is the position of a point in time (an instant) on a waveform cycle.

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Plasma oscillation

Plasma oscillations, also known as Langmuir waves (after Irving Langmuir), are rapid oscillations of the electron density in conducting media such as plasmas or metals in the ultraviolet region.

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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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Quasar

A quasar (also known as a QSO or quasi-stellar object) is an extremely luminous active galactic nucleus (AGN).

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Radar

Radar is an object-detection system that uses radio waves to determine the range, angle, or velocity of objects.

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Radar astronomy

Radar astronomy is a technique of observing nearby astronomical objects by reflecting microwaves off target objects and analyzing the reflections.

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Radio frequency

Radio frequency (RF) refers to oscillatory change in voltage or current in a circuit, waveguide or transmission line in the range extending from around twenty thousand times per second to around three hundred billion times per second, roughly between the upper limit of audio and the lower limit of infrared.

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Radio galaxy

Radio galaxies and their relatives, radio-loud quasars and blazars, are types of active galaxy that are very luminous at radio wavelengths, with luminosities up to 1039 W between 10 MHz and 100 GHz.

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Radio Galaxy Zoo

Radio Galaxy Zoo (RGZ) is an internet crowdsourced citizen science project that seeks to locate supermassive black holes in distant galaxies.

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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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Roger Clifton Jennison

Roger Clifton Jennison (18 December 1922 – 29 December 2006) worked as a radio astronomer at Jodrell Bank under the guidance of Robert Hanbury Brown.

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Ruby Payne-Scott

Ruby Violet Payne-Scott, BSc(Phys) MSc DipEd(Syd) (28 May 1912 – 25 May 1981) was an Australian pioneer in radiophysics and radio astronomy, and was the first female radio astronomer.

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Sagittarius (constellation)

Sagittarius is one of the constellations of the zodiac.

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Sagittarius A

Sagittarius A or Sgr A is a complex radio source at the center of the Milky Way.

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Sagittarius A*

Sagittarius A* (pronounced "Sagittarius A-star", standard abbreviation Sgr A*) is a bright and very compact astronomical radio source at the center of the Milky Way, near the border of the constellations Sagittarius and Scorpius.

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Second Cambridge Catalogue of Radio Sources

The Second Cambridge Catalogue of Radio Sources (2C) was published in 1955 by John R Shakeshaft and colleagues.

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Serendipity

Serendipity means an unplanned, fortuitous discovery.

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Shortwave radio

Shortwave radio is radio transmission using shortwave radio frequencies.

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Sidereal time

Sidereal time is a timekeeping system that astronomers use to locate celestial objects.

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Signal-to-noise ratio

Signal-to-noise ratio (abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise.

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Solar System

The Solar SystemCapitalization of the name varies.

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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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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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Sun

The Sun is the star at the center of the Solar System.

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Sunspot

Sunspots are temporary phenomena on the Sun's photosphere that appear as spots darker than the surrounding areas.

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Supermassive black hole

A supermassive black hole (SMBH or SBH) is the largest type of black hole, on the order of hundreds of thousands to billions of solar masses, and is found in the centre of almost all currently known massive galaxies.

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Supernova remnant

A supernova remnant (SNR) is the structure resulting from the explosion of a star in a supernova.

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Sydney

Sydney is the state capital of New South Wales and the most populous city in Australia and Oceania.

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Synchrotron radiation

Synchrotron radiation (also known as magnetobremsstrahlung radiation) is the electromagnetic radiation emitted when charged particles are accelerated radially, i.e., when they are subject to an acceleration perpendicular to their velocity.

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Telecommunications Research Establishment

The Telecommunications Research Establishment (TRE) was the main United Kingdom research and development organization for radio navigation, radar, infra-red detection for heat seeking missiles, and related work for the Royal Air Force (RAF) during World War II and the years that followed.

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Third Cambridge Catalogue of Radio Sources

The Third Cambridge Catalogue of Radio Sources (3C) is an astronomical catalogue of celestial radio sources detected originally at 159 MHz, and subsequently at 178 MHz.

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Titan (computer)

Titan was the prototype of the Atlas 2 computer developed by Ferranti and the University of Cambridge Mathematical Laboratory in Cambridge, England.

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Transmission line

In communications and electronic engineering, a transmission line is a specialized cable or other structure designed to conduct alternating current of radio frequency, that is, currents with a frequency high enough that their wave nature must be taken into account.

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University of Cambridge

The University of Cambridge (informally Cambridge University)The corporate title of the university is The Chancellor, Masters, and Scholars of the University of Cambridge.

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Vapor

In physics a vapor (American) or vapour (British and Canadian) is a substance in the gas phase at a temperature lower than its critical temperature,R.

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Very high frequency

Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten to one meter.

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Very Large Array

The Karl G. Jansky Very Large Array (VLA) is a centimeter-wavelength radio astronomy observatory located in central New Mexico on the Plains of San Agustin, between the towns of Magdalena and Datil, ~50 miles (80 km) west of Socorro.

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Very Long Baseline Array

The Very Long Baseline Array (VLBA) is a system of ten radio telescopes which are operated remotely from their Array Operations Center located in Socorro, New Mexico, as a part of the (LBO).

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Very-long-baseline interferometry

Very-long-baseline interferometry (VLBI) is a type of astronomical interferometry used in radio astronomy.

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Water

Water is a transparent, tasteless, odorless, and nearly colorless chemical substance that is the main constituent of Earth's streams, lakes, and oceans, and the fluids of most living organisms.

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Wave

In physics, a wave is a disturbance that transfers energy through matter or space, with little or no associated mass transport.

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Wave interference

In physics, interference is a phenomenon in which two waves superpose to form a resultant wave of greater, lower, or the same amplitude.

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Waveguide

A waveguide is a structure that guides waves, such as electromagnetic waves or sound, with minimal loss of energy by restricting expansion to one dimension or two.

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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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Waves (Juno)

Waves is an experiment on the Juno spacecraft to study radio and plasma waves.

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Wiley-VCH

Wiley-VCH is a German publisher owned by John Wiley & Sons.

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World War II

World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although conflicts reflecting the ideological clash between what would become the Allied and Axis blocs began earlier.

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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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Redirects here:

Millimeter-wave astronomy, Radio Astronomer, Radio Astronomy, Radio and Radar Astronomy, Radio astronomer, Radio astronomy station, Radioastronomy.

References

[1] https://en.wikipedia.org/wiki/Radio_astronomy

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