Logo
Unionpedia
Communication
Get it on Google Play
New! Download Unionpedia on your Android™ device!
Free
Faster access than browser!
And Ads-free!

Hipparcos

Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. [1]

137 relations: Aberration of light, Acronym, Adriaan Blaauw, Age of the universe, Apparent magnitude, Ariane (rocket family), Ariane 4, Arianespace, Asteroseismology, Astrium, Astrometry, Astronomical seeing, Atmosphere, Axial precession, Binary star, Bremen, Bristol, British Aerospace, Brown dwarf, Carl Zeiss AG, Carte du Ciel, Cartesian coordinate system, Catalogues of Fundamental Stars, Celestial sphere, Center of mass, Centre de données astronomiques de Strasbourg, Cepheid variable, Chandler wobble, Charge-coupled device, CNES, Correlation and dependence, Delft, Delta Scuti variable, Doppler effect, Double star, EADS CASA, Earth, Earth's rotation, Ecliptic, Effective temperature, ELA-2, Epoch (astronomy), European Space Agency, European Space Operations Centre, Exoplanet, François Mignard, Friedrichshafen, Gaia (spacecraft), Galactic halo, Galaxy, ..., Galaxy rotation curve, Gamma-ray burst, General relativity, Geocentric orbit, Geostationary orbit, Geostationary transfer orbit, Globular cluster, Gothenburg, Gould Belt, Gravity, Guiana Space Centre, Gyroscope, HD 209458, Hipparchus, Hubble Space Telescope, Hyades (star cluster), Hydrazine, Ice age, Image dissector, Inertial frame of reference, Initial mass function, International Celestial Reference System, Karl G. Jansky Very Large Array, Kourou, Least squares, Leiden, Light, Lobbying, Lutz–Kelker bias, Madrid, Marseille, Matra Marconi Space, MERLIN, Millennium Star Atlas, Minute and second of arc, Monthly Notices of the Royal Astronomical Society, Netherlands Institute for Space Research, Neuchâtel, Newton (unit), Oberkochen, Observatory of Strasbourg, Oort constants, Oort limit, Parallax, Parameterized post-Newtonian formalism, Photometric system, Photomultiplier, Pleiades, Proper motion, Quasar, Radial velocity, Red giant, Rheinmetall Air Defence, RR Lyrae variable, RUAG Space, S band, Satellite, Schmidt camera, Search for extraterrestrial intelligence, Sloan Digital Sky Survey, Space observatory, Special relativity, Spectroscopy, Spiral galaxy, Springer Science+Business Media, Standard error, Star, Star formation, Star system, Stellar classification, Stellar evolution, Stellar kinematics, Stellar structure, Subdwarf, Thales Alenia Space, Trigonometry, Tycho-2 Catalogue, UBV photometric system, United States Naval Observatory, Vélizy-Villacoublay, Very-long-baseline interferometry, Vignetting, White dwarf, Wolf–Rayet star, Zürich, 2MASS, 3C 273. Expand index (87 more) »

Aberration of light

The aberration of light (also referred to as astronomical aberration or stellar aberration) is an astronomical phenomenon which produces an apparent motion of celestial objects about their locations dependent on the velocity of the observer.

New!!: Hipparcos and Aberration of light · See more »

Acronym

An acronym is an abbreviation, used as a word, which is formed from the initial components in a phrase or a word.

New!!: Hipparcos and Acronym · See more »

Adriaan Blaauw

Adriaan Blaauw (12 April 1914 – 1 December 2010) was a Dutch astronomer.

New!!: Hipparcos and Adriaan Blaauw · See more »

Age of the universe

In physical cosmology, the age of the universe is the time elapsed since the Big Bang.

New!!: Hipparcos and Age of the universe · See more »

Apparent magnitude

The apparent magnitude (m) of a celestial object is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere.

New!!: Hipparcos and Apparent magnitude · See more »

Ariane (rocket family)

Ariane is a series of a European civilian expendable launch vehicles for space launch use.

New!!: Hipparcos and Ariane (rocket family) · See more »

Ariane 4

Ariane 4 was an expendable launch system, designed by the Centre National d'Etudes Spatiales and manufactured and marketed by its subsidiary Arianespace.

New!!: Hipparcos and Ariane 4 · See more »

Arianespace

Arianespace SA is a European multinational company founded in 1980 as the world's first commercial launch service provider.

New!!: Hipparcos and Arianespace · See more »

Asteroseismology

Asteroseismology (from Greek ἀστήρ, astēr, "star"; σεισμός, seismos, "earthquake"; and -λογία, -logia) also known as stellar seismology is the science that studies the internal structure of pulsating stars by the interpretation of their frequency spectra.

New!!: Hipparcos and Asteroseismology · See more »

Astrium

Astrium was an aerospace manufacturer subsidiary of the European Aeronautic Defence and Space Company (EADS) that provided civil and military space systems and services from 2006 to 2013.

New!!: Hipparcos and Astrium · See more »

Astrometry

Astrometry is the branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies.

New!!: Hipparcos and Astrometry · See more »

Astronomical seeing

Astronomical seeing refers to the blurring and twinkling of astronomical objects such as stars caused by turbulent mixing in the Earth's atmosphere varying the optical refractive index.

New!!: Hipparcos and Astronomical seeing · See more »

Atmosphere

An atmosphere (New Latin atmosphaera, 17th century, from Greek ἀτμός "vapor" and σφαῖρα "sphere") is a layer of gases surrounding a planet or other material body of sufficient mass that is held in place by the gravity of the body.

New!!: Hipparcos and Atmosphere · See more »

Axial precession

In astronomy, axial precession is a gravity-induced, slow, and continuous change in the orientation of an astronomical body's rotational axis.

New!!: Hipparcos and Axial precession · See more »

Binary star

A binary star is a star system consisting of two stars orbiting around their common center of mass.

New!!: Hipparcos and Binary star · See more »

Bremen

The City Municipality of Bremen (Stadtgemeinde Bremen) is a Hanseatic city in northwestern Germany.

New!!: Hipparcos and Bremen · See more »

Bristol

Bristol is a city, unitary authority and county in South West England with an estimated population of 442,500 in 2015.

New!!: Hipparcos and Bristol · See more »

British Aerospace

British Aerospace plc (BAe) was a British aircraft, munitions and defence-systems manufacturer.

New!!: Hipparcos and British Aerospace · See more »

Brown dwarf

Brown dwarfs are substellar objects not massive enough to sustain hydrogen-1 fusion reactions in their cores, unlike main-sequence stars.

New!!: Hipparcos and Brown dwarf · See more »

Carl Zeiss AG

Carl Zeiss is a German manufacturer of optical systems, industrial measurements and medical devices, founded in Jena, Germany in 1846 by optician Carl Zeiss.

New!!: Hipparcos and Carl Zeiss AG · See more »

Carte du Ciel

The Carte du Ciel (literally, 'Map of the Sky') and the Astrographic Catalogue (or Astrographic Chart) were two distinct but connected components of a massive international astronomical project, initiated in the late 19th century, to catalogue and map the positions of millions of stars as faint as 11th or 12th magnitude.

New!!: Hipparcos and Carte du Ciel · See more »

Cartesian coordinate system

A Cartesian coordinate system is a coordinate system that specifies each point uniquely in a plane by a pair of numerical coordinates, which are the signed distances from the point to two fixed perpendicular directed lines, measured in the same unit of length.

New!!: Hipparcos and Cartesian coordinate system · See more »

Catalogues of Fundamental Stars

The Catalogue of Fundamental Stars is a series of six astrometric catalogues of high precision positional data for a small selection of stars to define a celestial reference frame, which is a standard coordinate system for measuring positions of stars.

New!!: Hipparcos and Catalogues of Fundamental Stars · See more »

Celestial sphere

In astronomy and navigation, the celestial sphere is an imaginary sphere of arbitrarily large radius, concentric with Earth.

New!!: Hipparcos and Celestial sphere · See more »

Center of mass

In physics, the center of mass of a distribution of mass in space is the unique point where the weighted relative position of the distributed mass sums to zero or the point where if a force is applied causes it to move in direction of force without rotation.

New!!: Hipparcos and Center of mass · See more »

Centre de données astronomiques de Strasbourg

The Centre de données astronomiques de Strasbourg (CDS; English translation: Strasbourg Astronomical Data Center) is a data hub which collects and distributes astronomical information.

New!!: Hipparcos and Centre de données astronomiques de Strasbourg · See more »

Cepheid variable

A Cepheid variable is a star that pulsates radially, varying in both temperature and diameter to produce brightness changes with a well-defined stable period and amplitude.

New!!: Hipparcos and Cepheid variable · See more »

Chandler wobble

The Chandler wobble is a small deviation in the Earth's axis of rotation relative to the solid earth, which was discovered by American astronomer Seth Carlo Chandler in 1891.

New!!: Hipparcos and Chandler wobble · See more »

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.

New!!: Hipparcos and Charge-coupled device · See more »

CNES

The Centre national d'études spatiales (CNES) (English: National Centre for Space Studies) is the French government space agency (administratively, a "public administration with industrial and commercial purpose").

New!!: Hipparcos and CNES · See more »

Correlation and dependence

In statistics, dependence is any statistical relationship between two random variables or two sets of data.

New!!: Hipparcos and Correlation and dependence · See more »

Delft

Delft is a city and a municipality in the Netherlands.

New!!: Hipparcos and Delft · See more »

Delta Scuti variable

A Delta Scuti variable (sometimes termed dwarf cepheid) is a variable star which exhibits variations in its luminosity due to both radial and non-radial pulsations of the star's surface.

New!!: Hipparcos and Delta Scuti variable · See more »

Doppler effect

The Doppler effect (or Doppler shift) is the change in frequency of a wave (or other periodic event) for an observer moving relative to its source.

New!!: Hipparcos and Doppler effect · See more »

Double star

In observational astronomy, a double star is a pair of stars that appear close to each other in the sky as seen from Earth when viewed through an optical telescope.

New!!: Hipparcos and Double star · See more »

EADS CASA

EADS CASA was a Spanish aircraft manufacturer, previously Construcciones Aeronáuticas SA (CASA).

New!!: Hipparcos and EADS CASA · See more »

Earth

Earth (also the world, in Greek: Gaia, or in Latin: Terra), is the third planet from the Sun, the densest planet in the Solar System, the largest of the Solar System's four terrestrial planets, and the only astronomical object known to accommodate life.

New!!: Hipparcos and Earth · See more »

Earth's rotation

Earth's rotation is the rotation of the planet Earth around its own axis.

New!!: Hipparcos and Earth's rotation · See more »

Ecliptic

The ecliptic is the apparent path of the Sun on the celestial sphere, and is the basis for the ecliptic coordinate system.

New!!: Hipparcos and Ecliptic · See more »

Effective temperature

The effective temperature of a body such as a star or planet is the temperature of a black body that would emit the same total amount of electromagnetic radiation.

New!!: Hipparcos and Effective temperature · See more »

ELA-2

ELA-2, short for Ensemble de Lancement Ariane 2 (French for Ariane Launch Area 2), was a launch pad at the Centre Spatial Guyanais in French Guiana.

New!!: Hipparcos and ELA-2 · See more »

Epoch (astronomy)

In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.

New!!: Hipparcos and Epoch (astronomy) · See more »

European Space Agency

The European Space Agency (ESA; Agence spatiale européenne, ASE; Europäische Weltraumorganisation) is an intergovernmental organisation dedicated to the exploration of space, with 22 member states.

New!!: Hipparcos and European Space Agency · See more »

European Space Operations Centre

The European Space Operations Centre (ESOC) serves as the main mission control centre for the European Space Agency (ESA) and is located in Darmstadt, Germany.

New!!: Hipparcos and European Space Operations Centre · See more »

Exoplanet

An exoplanet or extrasolar planet is a planet that orbits a star other than the Sun.

New!!: Hipparcos and Exoplanet · See more »

François Mignard

François Mignard (born 1949) is a French astronomer who is the director of CERGA (Centre de recherches en géodynamique et astrométrie) of the Observatoire de la Côte d'Azur.

New!!: Hipparcos and François Mignard · See more »

Friedrichshafen

Friedrichshafen is a university city on the eastern shoreline of Lake Constance (the Bodensee) in Southern Germany, near both the borders of Switzerland and Austria.

New!!: Hipparcos and Friedrichshafen · See more »

Gaia (spacecraft)

Gaia is a space observatory of the European Space Agency (ESA) designed for astrometry.

New!!: Hipparcos and Gaia (spacecraft) · See more »

Galactic halo

The galactic halo is an extended, roughly spherical component of a galaxy which extends beyond the main, visible component.

New!!: Hipparcos and Galactic halo · See more »

Galaxy

A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas and dust, and dark matter.

New!!: Hipparcos and Galaxy · See more »

Galaxy rotation curve

The rotation curve of a disc galaxy (also called a velocity curve) is a plot of the measured magnitude of the orbital velocities (i.e., the speeds) of visible stars or gas in that galaxy versus their radial distance from that galaxy's centre and typically rendered graphically as a plot.

New!!: Hipparcos and Galaxy rotation curve · See more »

Gamma-ray burst

Gamma-ray bursts (GRBs) are flashes of gamma rays associated with extremely energetic explosions that have been observed in distant galaxies.

New!!: Hipparcos and Gamma-ray burst · See more »

General relativity

General relativity, also known as the general theory of relativity, is the geometric theory of gravitation published by Albert Einstein in 1915 and the current description of gravitation in modern physics.

New!!: Hipparcos and General relativity · See more »

Geocentric orbit

A geocentric orbit involves any object orbiting the Earth, such as the Moon or artificial satellites.

New!!: Hipparcos and Geocentric orbit · See more »

Geostationary orbit

A geostationary orbit, geostationary Earth orbit or geosynchronous equatorial orbit (GEO) is a circular orbit above the Earth's equator and following the direction of the Earth's rotation.

New!!: Hipparcos and Geostationary orbit · See more »

Geostationary transfer orbit

A geosynchronous transfer orbit or geostationary transfer orbit (GTO) is a Hohmann transfer orbit used to reach geosynchronous or geostationary orbit using high thrust chemical engines.

New!!: Hipparcos and Geostationary transfer orbit · See more »

Globular cluster

A globular cluster is a spherical collection of stars that orbits a galactic core as a satellite.

New!!: Hipparcos and Globular cluster · See more »

Gothenburg

Gothenburg (Göteborg) is the second-largest city in Sweden and the fifth-largest in the Nordic countries.

New!!: Hipparcos and Gothenburg · See more »

Gould Belt

The Gould Belt is a partial ring of stars in the Milky Way, about 3000 light years across, tilted toward the galactic plane by about 16 to 20 degrees.

New!!: Hipparcos and Gould Belt · See more »

Gravity

Gravity or gravitation is a natural phenomenon by which all things with mass are brought towards (or 'gravitate' towards) one another including stars, planets, galaxies and even light and sub-atomic particles.

New!!: Hipparcos and Gravity · See more »

Guiana Space Centre

The Guiana Space Centre or, more commonly, Centre Spatial Guyanais (CSG) is a French and European spaceport near Kourou in French Guiana.

New!!: Hipparcos and Guiana Space Centre · See more »

Gyroscope

A gyroscope (from Greek γῦρος gûros, "circle" and σκοπέω skopéō, "to look") is a spinning wheel or disc in which the axis of rotation is free to assume any orientation.

New!!: Hipparcos and Gyroscope · See more »

HD 209458

HD 209458 is an 8th magnitude star in the constellation Pegasus.

New!!: Hipparcos and HD 209458 · See more »

Hipparchus

Hipparchus of Nicaea (Ἵππαρχος, Hipparkhos), was a Greek astronomer, geographer, and mathematician.

New!!: Hipparcos and Hipparchus · See more »

Hubble Space Telescope

The Hubble Space Telescope (HST) is a space telescope that was launched into low Earth orbit in 1990, and remains in operation.

New!!: Hipparcos and Hubble Space Telescope · See more »

Hyades (star cluster)

The Hyades (Greek Ὑάδες, also known as Melotte 25 or Collinder 50) is the nearest open cluster to the Solar System and one of the best-studied of all star clusters.

New!!: Hipparcos and Hyades (star cluster) · See more »

Hydrazine

Hydrazine (systematically named diazane or tetrahydridodinitrogen(N—N)) is an inorganic compound with the chemical formula (also written). It is a colourless flammable liquid with an ammonia-like odor.

New!!: Hipparcos and Hydrazine · See more »

Ice age

An ice age is a period of long-term reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers.

New!!: Hipparcos and Ice age · See more »

Image dissector

An image dissector, also called a dissector tube, is a video camera tube in which photocathode emissions create an "electron image" which is then scanned to produce an electrical signal representing the visual image.

New!!: Hipparcos and Image dissector · See more »

Inertial frame of reference

In physics, an inertial frame of reference (also inertial reference frame or inertial frame or Galilean reference frame or inertial space) is a frame of reference that describes time and space homogeneously, isotropically, and in a time-independent manner.

New!!: Hipparcos and Inertial frame of reference · See more »

Initial mass function

In astronomy, the initial mass function (IMF) is an empirical function that describes the distribution of initial masses for a population of stars.

New!!: Hipparcos and Initial mass function · See more »

International Celestial Reference System

The International Celestial Reference System (ICRS) is the current standard celestial reference system adopted by the International Astronomical Union (IAU).

New!!: Hipparcos and International Celestial Reference System · See more »

Karl G. Jansky Very Large Array

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

New!!: Hipparcos and Karl G. Jansky Very Large Array · See more »

Kourou

Kourou is a commune in French Guiana, an overseas region and department of France located in South America.

New!!: Hipparcos and Kourou · See more »

Least squares

The method of least squares is a standard approach in regression analysis to the approximate solution of overdetermined systems, i.e., sets of equations in which there are more equations than unknowns.

New!!: Hipparcos and Least squares · See more »

Leiden

Leiden (in English and archaic Dutch also Leyden) is a city and municipality in the Dutch province of South Holland.

New!!: Hipparcos and Leiden · See more »

Light

Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum.

New!!: Hipparcos and Light · See more »

Lobbying

Lobbying (also lobby) is the act of attempting to influence decisions made by officials in a government, most often legislators or members of regulatory agencies.

New!!: Hipparcos and Lobbying · See more »

Lutz–Kelker bias

The Lutz–Kelker bias is a systematic bias that results from using the assumption that the number of observable stars increases with the square of the distance.

New!!: Hipparcos and Lutz–Kelker bias · See more »

Madrid

Madrid is a south-western European city and the capital and largest municipality of Spain.

New!!: Hipparcos and Madrid · See more »

Marseille

Marseille (locally:; Marselha), also known as Marseilles in English, is a city in France.

New!!: Hipparcos and Marseille · See more »

Matra Marconi Space

Matra Marconi Space (MMS) was a Franco-British aerospace company.

New!!: Hipparcos and Matra Marconi Space · See more »

MERLIN

The Multi-Element Radio Linked Interferometer Network (MERLIN) is an interferometer array of radio telescopes spread across England.

New!!: Hipparcos and MERLIN · See more »

Millennium Star Atlas

The Millennium Star Atlas was constructed as a collaboration between a team at Sky & Telescope led by Roger Sinnott, and the European Space Agency's Hipparcos project, led by Michael Perryman.

New!!: Hipparcos and Millennium Star Atlas · See more »

Minute and second of arc

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

New!!: Hipparcos and Minute and second of arc · See more »

Monthly Notices of the Royal Astronomical Society

Monthly Notices of the Royal Astronomical Society (MNRAS) is a peer-reviewed scientific journal covering research in astronomy and astrophysics.

New!!: Hipparcos and Monthly Notices of the Royal Astronomical Society · See more »

Netherlands Institute for Space Research

SRON Netherlands Institute for Space Research is the Dutch expertise institute for space research.

New!!: Hipparcos and Netherlands Institute for Space Research · See more »

Neuchâtel

Neuchâtel, neu(f) "new" + chatel "castle" (château); lang; lang; lang)It was called Neuchâtel outre Joux too to make the difference with another Neuchâtel in Burgundy, now Neuchâtel-Urtière. is the capital of the Swiss canton of Neuchâtel on Lake Neuchâtel. The city has approximately 33,600 inhabitants (80,000 in the metropolitan area). The city is sometimes referred to historically by the German name, which has the same meaning, since it originally belonged to the Holy Roman Empire and later Prussia, which ruled the area until 1848. The official language of Neuchâtel is French. Neuchâtel is a pilot of the Council of Europe and the European Commission Intercultural cities programme.

New!!: Hipparcos and Neuchâtel · See more »

Newton (unit)

The newton (symbol: N) is the International System of Units (SI) derived unit of force.

New!!: Hipparcos and Newton (unit) · See more »

Oberkochen

Oberkochen is a town (officially a city, despite its size) in the Ostalbkreis, in Baden-Württemberg, in Germany, central Europe.

New!!: Hipparcos and Oberkochen · See more »

Observatory of Strasbourg

The Observatory of Strasbourg is an astronomical observatory in Strasbourg, France.

New!!: Hipparcos and Observatory of Strasbourg · See more »

Oort constants

The Oort constants (discovered by Jan Oort) A and B are empirically derived parameters that characterize the local rotational properties of our galaxy, the Milky Way, in the following manner: \begin & A.

New!!: Hipparcos and Oort constants · See more »

Oort limit

The Oort limit is a theoretical location at the outer limits of the Oort cloud, where the amount of comets and minor planets orbiting the Sun drops drastically, or drops entirely.

New!!: Hipparcos and Oort limit · See more »

Parallax

Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.

New!!: Hipparcos and Parallax · See more »

Parameterized post-Newtonian formalism

Post-Newtonian formalism is a calculational tool that expresses Einstein's (nonlinear) equations of gravity in terms of the lowest-order deviations from Newton's law of universal gravitation.

New!!: Hipparcos and Parameterized post-Newtonian formalism · See more »

Photometric system

In astronomy, a photometric system is a set of well-defined passbands (or filters), with a known sensitivity to incident radiation.

New!!: Hipparcos and Photometric system · See more »

Photomultiplier

Photomultiplier tubes (photomultipliers or PMTs for short), members of the class of vacuum tubes, and more specifically vacuum phototubes, are extremely sensitive detectors of light in the ultraviolet, visible, and near-infrared ranges of the electromagnetic spectrum.

New!!: Hipparcos and Photomultiplier · See more »

Pleiades

In astronomy, the Pleiades, or Seven Sisters (Messier 45 or M45), is an open star cluster containing middle-aged hot B-type stars located in the constellation of Taurus.

New!!: Hipparcos and Pleiades · See more »

Proper motion

Proper motion is the astronomical measure of the observed changes in apparent positions of stars in the sky as seen from the center of mass of the Solar System, as compared to the imaginary fixed background of the more distant stars.

New!!: Hipparcos and Proper motion · See more »

Quasar

Quasars or quasi-stellar radio sources are the most energetic and distant members of a class of objects called active galactic nuclei (AGN).

New!!: Hipparcos and Quasar · See more »

Radial velocity

The radial velocity of an object with respect to a given point is the rate of change of the distance between the object and the point.

New!!: Hipparcos and Radial velocity · See more »

Red giant

A red giant is a luminous giant star of low or intermediate mass (roughly 0.3–8 solar masses) in a late phase of stellar evolution.

New!!: Hipparcos and Red giant · See more »

Rheinmetall Air Defence

Rheinmetall Air Defence AG is a division of German armament manufacturer Rheinmetall, created when the company's Oerlikon Contraves unit was renamed on 1 January 2009 and integrated with Rheinmetall's other air-defence products.

New!!: Hipparcos and Rheinmetall Air Defence · See more »

RR Lyrae variable

RR Lyrae variables are periodic variable stars, commonly found in globular clusters, and are used as standard candles to measure (extra)galactic distances.

New!!: Hipparcos and RR Lyrae variable · See more »

RUAG Space

RUAG Space is the Space Division of the Swiss technology group RUAG.

New!!: Hipparcos and RUAG Space · See more »

S band

The S band is part of the microwave band of the electromagnetic spectrum.

New!!: Hipparcos and S band · See more »

Satellite

In the context of spaceflight, a satellite is an artificial object which has been intentionally placed into orbit.

New!!: Hipparcos and Satellite · See more »

Schmidt camera

A Schmidt camera, also referred to as the Schmidt telescope, is a catadioptric astrophotographic telescope designed to provide wide fields of view with limited aberrations.

New!!: Hipparcos and Schmidt camera · See more »

Search for extraterrestrial intelligence

The search for extraterrestrial intelligence (SETI) is the collective name for scientific activities undertaken to search for intelligent extraterrestrial life.

New!!: Hipparcos and Search for extraterrestrial intelligence · See more »

Sloan Digital Sky Survey

The Sloan Digital Sky Survey or SDSS is a major multi-filter imaging and spectroscopic redshift survey using a dedicated 2.5-m wide-angle optical telescope at Apache Point Observatory in New Mexico, United States.

New!!: Hipparcos and Sloan Digital Sky Survey · See more »

Space observatory

A space observatory is any instrument (such as a telescope) in outer space that is used for observation of distant planets, galaxies and other outer space objects.

New!!: Hipparcos and Space observatory · See more »

Special relativity

In physics, special relativity (SR, also known as the special theory of relativity or STR) is the generally accepted physical theory regarding the relationship between space and time.

New!!: Hipparcos and Special relativity · See more »

Spectroscopy

Spectroscopy is the study of the interaction between matter and electromagnetic radiation.

New!!: Hipparcos and Spectroscopy · See more »

Spiral galaxy

A spiral galaxy is a certain kind of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae(pp. 124–151) and, as such, forms part of the Hubble sequence.

New!!: Hipparcos and Spiral galaxy · See more »

Springer Science+Business Media

Springer Science+Business Media or Springer is a global publishing company that publishes books, e-books and peer-reviewed journals in science, technical and medical (STM) publishing.

New!!: Hipparcos and Springer Science+Business Media · See more »

Standard error

The standard error (SE) is the standard deviation of the sampling distribution of a statistic, most commonly of the mean.

New!!: Hipparcos and Standard error · See more »

Star

A star is a luminous sphere of plasma held together by its own gravity.

New!!: Hipparcos and Star · See more »

Star formation

Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as "stellar nurseries" or "star-forming regions", collapse to form stars.

New!!: Hipparcos and Star formation · See more »

Star system

A star system or stellar system is a small number of stars that orbit each other, bound by gravitational attraction.

New!!: Hipparcos and Star system · See more »

Stellar classification

In astronomy, stellar classification is the classification of stars based on their spectral characteristics.

New!!: Hipparcos and Stellar classification · See more »

Stellar evolution

Stellar evolution is the process by which a star changes during its lifetime.

New!!: Hipparcos and Stellar evolution · See more »

Stellar kinematics

Stellar kinematics is the study of the movement of stars without needing to understand how they acquired their motion.

New!!: Hipparcos and Stellar kinematics · See more »

Stellar structure

Stars of different mass and age have varying internal structures.

New!!: Hipparcos and Stellar structure · See more »

Subdwarf

A subdwarf, sometimes denoted by "sd", is a star with luminosity class VI under the Yerkes spectral classification system.

New!!: Hipparcos and Subdwarf · See more »

Thales Alenia Space

Thales Alenia Space is a Franco-Italian aerospace manufacturer formed after the Thales Group bought the participation of Alcatel in the two joint-ventures between Alcatel and Finmeccanica, Alcatel Alenia Space and Telespazio.

New!!: Hipparcos and Thales Alenia Space · See more »

Trigonometry

Trigonometry (from Greek trigōnon, "triangle" and metron, "measure") is a branch of mathematics that studies relationships involving lengths and angles of triangles.

New!!: Hipparcos and Trigonometry · See more »

Tycho-2 Catalogue

The Tycho-2 Catalogue is a catalogue of more than 2.5 million of the brightest stars.

New!!: Hipparcos and Tycho-2 Catalogue · See more »

UBV photometric system

UBV photometric system, also called the Johnson system (or Johnson-Morgan system), is a wide band photometric system for classifying stars according to their colors.

New!!: Hipparcos and UBV photometric system · See more »

United States Naval Observatory

The United States Naval Observatory (USNO) is one of the oldest scientific agencies in the United States, with a primary mission to produce Positioning, Navigation and Timing (PNT) for the United States Navy and the United States Department of Defense.

New!!: Hipparcos and United States Naval Observatory · See more »

Vélizy-Villacoublay

Vélizy-Villacoublay is a commune in the Yvelines department in the Île-de-France in north-central France.

New!!: Hipparcos and Vélizy-Villacoublay · See more »

Very-long-baseline interferometry

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

New!!: Hipparcos and Very-long-baseline interferometry · See more »

Vignetting

In photography and optics, vignetting (French: "vignette") is a reduction of an image's brightness or saturation at the periphery compared to the image center.

New!!: Hipparcos and Vignetting · See more »

White dwarf

A white dwarf, also called a degenerate dwarf, is a stellar remnant composed mostly of electron-degenerate matter.

New!!: Hipparcos and White dwarf · See more »

Wolf–Rayet star

Wolf–Rayet stars (often referred to as WR stars) are a heterogeneous set of stars with unusual spectra showing prominent broad emission lines of highly ionised helium and nitrogen or carbon.

New!!: Hipparcos and Wolf–Rayet star · See more »

Zürich

Zürich or Zurich (Zürich, Swiss German: Züri, Zurich, Zurigo, Turitg) is the largest city in Switzerland and the capital of the canton of Zürich.

New!!: Hipparcos and Zürich · See more »

2MASS

The Two Micron All-Sky Survey (2MASS) was a survey of the whole sky in three infrared wavebands around 2 micrometres (μm): J (1.25 μm), H (1.65 μm), and Ks (2.17 μm).

New!!: Hipparcos and 2MASS · See more »

3C 273

3C 273 is a quasar located in the constellation Virgo.

New!!: Hipparcos and 3C 273 · See more »

Redirects here:

HIP Catalog, HIP Catalogue, HIP catalog, HIP catalogue, HIPPARCOS, High Precision Parallax Collecting Satellite, Hipparcos Catalog, Hipparcos Catalogue, Hipparcos Input Catalogue, Hipparcos catalog, Hipparcos catalogue, Hipparcos objects, Hipparcos satellite, Hipparcos stars, Hippocarpos, Tycho Catalog, Tycho Catalogue, Tycho catalog, Tycho catalogue, Tycho-1, Tycho-1 Catalog, Tycho-1 Catalogue, Tycho-1 catalog, Tycho-1 catalogue.

References

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

OutgoingIncoming
Hey! We are on Facebook now! »